metals | Metal's

Deformation through stainless steel stamping: what it is and how to use it in your projects

Stainless steel stamping is a process that allows the metal to be shaped into a specific form. It is possible to create geometric profiles, even complex ones, without excessive material waste, while maintaining all the valuable properties of stainless steel.

To perform stamping, advanced machinery is required, along with a deep understanding of the metal and its processing. Each case must be evaluated individually to determine the best options for meeting the specific needs of the target market.

In this article, we will explain in more detail what stainless steel stamping is, its characteristics, advantages, applications, and the differences between hot and cold working processes.

What is stainless steel stamping?

As mentioned earlier, stainless steel stamping is a process that allows the metal to be deformed and/or shaped to achieve a predetermined form through the use of suitable molds, the application of press forces, and the use of other tools applied to the molds (such as punches, for example, which are useful for creating holes, engravings, and embossments).
Stainless steel stamping is carried out on objects of both large and small dimensions, including machine parts or components with varying thicknesses. Cold stamping is often associated with deep drawing, a specific press-working technique that gives the stainless steel sheet a box-like or cup-shaped form.

The advantages of stamping

Stamping allows for the versatile and cost-effective production of semi-finished products, components, and complex assemblies in large quantities, ensuring speed and efficiency. Precision work avoids material waste, thus also reducing the final costs of the entire product transformation process.

Why use it specifically on stainless steel? Because stainless steel is a resistant, durable, and robust metal, well-suited for this type of process. It enables accurate creations that can be adapted to a wide variety of markets, production needs, and customizations.

Sectors of application

Stamping is a rigorous and precise process used in various sectors, including food, automotive, petrochemical, and chemical industries, to name just a few. These are fields where stainless steel is chosen for its undeniable characteristics, such as strength, mechanical resistance, and durability.

Hot and cold stainless steel stamping: what are the differences?

Typically, stainless steel stamping involves several processing stages, including:

the creation of a mold that meets the design and shape agreed upon with the client;
the installation of the mold onto the machine (along with any accessories);
the loading of the steel sheet;
the start of the process, which can take place either hot or cold.

In particular, during hot stamping, the metal sheet is subjected to high temperatures. There are various methods to carry out this process. For example, direct hot stamping involves heating the sheet, transferring it onto a cold mold, and then processing it. In indirect hot stamping, the stainless steel undergoes a “heating” process both before and after stamping. This option is primarily used for creating complex geometries or, with the deep-drawing technique, for deep processes such as making ice cream tubs.
On the other hand, with cold stamping, the material is processed at room temperature. Specifically, when hydraulic machines are used, the stainless steel is placed between the punch and the mold, subjecting the material to the deforming force of the presses, achieving even significant depths. This is a faster process, mainly chosen for the production of small components, in series or with varying thicknesses.o soprattutto per la produzione di componenti di piccole dimensioni, in serie o con spessori differenti.

Stainless steel stamping: is cold or hot stamping better?

The choice between these two types of processing can vary depending on whether simple or complex shapes need to be produced. However, it is crucial that this process is performed with precision and expertise. The creation of the mold, in particular, is essential to ensure that every operation is carried out correctly, preventing issues such as production stoppages, waste, and defects in the metal.

Stainless steel stamping: the art of shaping and customizing a component

Thanks to stainless steel stamping, it is possible to create customized components, even in large quantities, with precision and maximum reliability. As mentioned earlier, different machines are used for this process, both hot and cold, and not all companies working with steel have all the necessary equipment to complete every stage of the process.

At Metal’s, however, we have a machine park equipped for stainless steel stamping. Our hydraulic machines boast a pressing power of 1,000 tons, while our mechanical machines can reach up to 400 tons. These are important features that, if necessary, allow us to perform deeper, more precise, and extensive deep-drawing operations without damaging the material (such as causing bends or cracks).

These advanced and professional technologies enable us to meet the growing demands of clients who require specific designs or custom needs. For example, companies operating in the food industry, producing ovens, dishwashers, and other professional equipment for the catering sector. Regarding the preparation and creation of molds, we can work on existing projects—perhaps suggesting possible improvements and implementations—or develop new ones in collaboration with the client and our team of technicians, optimizing costs and streamlining the process.

Stainless steel stamping is typically suited to large-scale production, and once the deep-drawing molds are agreed upon, the process moves swiftly. In this regard, custom molds allow for the production of high-quality, flawless components, significantly speeding up production.

Additionally, the client can opt for other treatments such as pickling and passivation (to remove impurities and improve corrosion resistance), or surface treatments like shot peening and satin finishing (to enhance aesthetics), along with final surface cleaning. These processes can be optional or necessary. For the medical sector, for instance, it is essential that surfaces are treated with brushing, a finish that ensures greater hygienic safety (as indicated in decree no. 269 of December 12, 2007).

This approach is ideal for offering safe products that comply with the regulations in the target market and meet all the client’s requirements. At Metal’s, we can evaluate and agree on these treatments together to achieve all the set goals, optimizing the entire process.

Want to learn more?

Discover why you should rely on our professionals for stainless steel stamping. Request our consultation and evaluate the benefits you can gain for your processes.

Case history Metal’s: welding, an ISO 3834-2 certified automated process

welding a robotized certified process case study

At Metal’s, we can carry out certified welding orders to meet our clients’ specific needs.

We have an extensive machine park, complete with automated systems that allow us to certify specific processes, as well as improve production and speed up operations to always meet agreed deadlines.

As your sole point of contact, we meticulously manage every detail and suggest actionable steps to optimize a project, both in terms of production and cost and logistics. One of our key goals is to streamline the entire process, making each phase increasingly sustainable, including transportation.

In this case study, we explain how we can provide you with welded semi-finished products and complex assemblies, complete with certification. We also highlight the advantages of a fully planned and organized system.

Certified welded products and meticulous logistics management: a Metal’s case history

Every project is realized after an evaluation by our technical department, even starting from an idea proposed by the client. This way, we can assess its production feasibility and identify any potential issues, all while maintaining an active and collaborative relationship. If necessary, we suggest possible improvements to reduce costs, improve production timelines, or ensure greater sustainability in transportation.
This was the case, for example, with a major client in the Food Processing sector who required a certified solution.

The case and the solution in brief: the need to eliminate gaps

A renowned German company with international distribution asked us to create an oven with sealed welding zones, free of gaps, in three different sizes.
The goal? To prevent the accumulation of cooking residues in hard-to-clean areas (such as the spaces between two components, corners, or small crevices that trigger material oxidation) and to extend the product’s lifespan.

Our proposal: targeted, certified robotic welding

To meet the buyer’s requests — including continuous production of around 6,000 units per year — we proposed a robotic internal welding process.This precise operation focuses on the functional areas of the oven components, allowing us to seal the gaps between the joints (i.e., the empty spaces that can form between parts, where dirt or cooking residues may accumulate).

Testing and prototypes for an excellent result

Before starting mass production, as with every project, tests and prototypes are necessary, carried out on the selected material (in this case, food-grade stainless steel). This allows us to meet the client’s requirements, fine-tuning processes, speeding them up, and avoiding waste.

For the production of gap-free ovens, in addition to a series of verification tests conducted at Metal’s, the client also independently performed external durability tests in a specialized laboratory. This allowed the client to simulate the product’s lifespan based on its intended use, considering factors such as operating conditions, saturation environment, humidity, and salinity.

Production launch

After passing the preliminary checks, we moved forward with the development of the entire industrialization phase. In this stage, we created the molds for the three different types of ovens, as well as the bending and welding equipment. Once the entire welding process configuration was set up, we focused on optimizing the cleaning process through pickling and localized passivation. The result? A smooth-surfaced product, capable of preventing contamination and featuring an additional protective anti-corrosion layer.

The importance of certifications

One of the key requirements for this project concerns certifications. At Metal’s, we hold both certifications for welding quality (EN ISO 3834-2:2021) and for welders (UNI EN ISO 9606-1:2017).

“In projects like these, with specific and detailed requirements, the testing and prototyping phase is essential to ensure that we’re on the right track. It takes time to develop the industrialization process, create the molds, the equipment, and configure the processes in the best possible way, improving production times and creating a perfect product. Even when the client has a clear vision of the goals to achieve, an external perspective can be useful to reach a better result. It’s a lengthy process in its initial stages, but one that must be refined in every aspect to meet the client’s demands, while also keeping an eye on sustainability.” – Luca Regazzo, Technical Sales Manager

Supply, warehouse, and logistics: a key element for an efficient and sustainable process

At Metal’s, we offer a complete supply chain management service, from raw material procurement to product shipment. In the context of sustainable management, those who rely on us as their sole point of contact can also count on the organization of supplies, warehouse, and transportation.

We contact suppliers to obtain the materials needed for production, prepare a safety stock, and coordinate with the client on deadlines for goods delivery, ensuring the supply chain remains active and can handle possible downtime or emergencies.

With this in mind – and to avoid overloading production – we manufacture semi-finished products well in advance, assembling them only as the agreed delivery date approaches. This allows us to work ahead of time, provide warehousing services for our clients, and ship on schedule.

We offer our expertise to find the right packaging to prevent product damage during container shipping or ground transportation. Additionally, we plan shipments by optimizing space (and the associated costs). To this end, we prefer to send products in full-load shipments, devising effective and sustainable solutions to reduce costs and waste, also considering safe material stacking.

Rapid solutions in case of emergencies

When it comes to transportation, it’s essential to consider that assemblies and semi-finished products are bulky yet very lightweight.

For the German client, we arranged shipments to Europe and China, proposing two different solutions. For Europe, we opted for a system of stacking two oven models within the same container. For storage in China, our technical department designed an attachment to be applied to the product to enable shipping three pieces instead of two in the same space.
This option had to be quickly replanned because the carrier provided different container measurements. Even in emergencies, just before a shipment, we quickly readjusted to reorganize the space and ensure the order was shipped on time, while making sure the goods were well-packaged and protected. This solution allowed us to minimize the number of shipments, reduce costs, and have a lower environmental impact.

Market diversification: the importance of supply chain

Managing a company’s supply chain for market diversification and business growth aims at optimizing and streamlining all activities, from production to logistics. It is a complex, dynamic process designed to achieve a set goal, involving various professionals who are coordinated for efficient, tailored management. This is crucial for companies operating in multiple sectors and producing new products for different markets, diversifying them.

Let’s explore what the supply chain is, why it should be applied, and the method Metal’s uses in this area.

What is a supply chain, and how it can make a difference

A supply chain refers to all the coordination activities adopted by a company to manage and optimize the stages of the entire production chain, from sourcing materials to delivering the finished product. These steps can vary by sector, but typically include:

technical consulting;
design;
selection and purchase of raw materials;
supplier coordination;
production;
logistics;
shipping.

The goal of this planning is to provide the client with a high-quality, customized product by enhancing every phase of the process. To achieve this and increase competitiveness in the market, multiple specialized figures are involved within the company’s ecosystem, from the technical office to product quality control managers.

Supply chain links

Within this process, three key phases, also known as “supply chain links,” ensure a complete and continuous flow:

sourcing: focused on acquiring the necessary raw materials to meet specific business needs (ensuring quality and the right price);
production: where raw materials are processed, semi-finished goods are assembled, and manual and mechanical interventions are made on the products, adhering to agreed standards;
distribution: delivering the requested product to the client, ensuring safety, speed, and compliance with customs regulations (if shipping abroad).

To gain the most benefits, each phase requires proactive and timely actions, making the right decisions, and interpreting varying needs.ità.

What does the supply chain process involve?

The supply chain consists of a series of activities that involve multiple roles and sectors. These include:

Planning: Understanding the market and client needs helps plan material sourcing and inventory to meet or reduce costs, avoid waste, and prevent interruptions in the production chain.
Acquisition: Choosing and managing suppliers effectively helps build and maintain trusting relationships.
Production: All phases of product creation are involved, where specialized personnel and cutting-edge machinery—often automated—are closely coordinated to optimize performance under fair and safe working conditions.

Logistics: From packaging to shipping, everything is designed to streamline operations while fully complying with regulations (choosing the best transport method and providing necessary documentation for customs).petto delle normative (valutando il sistema migliore di trasporto e offrendo la documentazione necessaria da presentare alle Dogane).

Supply chain benefits

Managing the supply chain effectively offers several advantages:

optimizing time;
ensuring maximum performance and smooth production flow;
enhancing partner and supplier selection (focusing on those committed to sustainability);
minimizing waste and costs by aligning supply with demand.

Additionally, overseeing and coordinating all supply chain stages helps prevent and quickly resolve potential risks or issues, avoiding production and logistics slowdowns. Resilience is vital in the supply chain, as it allows quick solutions when, for example, a supplier experiences delays or lacks essential components. We demonstrated how we sourced materials and components during a crisis in a dedicated case history.

Supply chain for market diversification: what’s essential today

Speed, flexibility, precision, and efficiency are key for market diversification in 2024. To remain competitive and enter new sectors – whether complex assemblies, components, or semi-finished goods – high-performing, high-quality products must be delivered, with attention to every detail, even after production. It is also important to guarantee clients on-time production while mitigating risks (such as sourcing raw materials) by always offering a viable alternative.

Coordinating relationships with multiple raw material suppliers, offering diverse and precise production in short timeframes, testing product quality, and planning logistics are fundamental to standing out in the market. Additionally, there is a growing need for a sustainable and responsible supply chain that aims to minimize environmental impact (in line with the Corporate sustainability due diligence directive, also known as the Supply Chain Act).

Metal’s approach to supply chain for market diversification

As we’ve seen, a well-designed supply chain offers many benefits. At Metal’s, this process allows us to serve as the sole point of contact for project management.

We handle the entire supply chain, offering a comprehensive service that includes technical consulting, design, supplier coordination, raw material procurement, lean production, assembly, and final testing. We serve various industrial sectors with tailored solutions that meet every expectation and request, verticalizing supply chains.

We also manage logistics and handling—storing even large goods in our warehouses—and deliver orders to the client’s facility, providing safe and customized packaging if needed. Regarding shipping, we can deliver orders both in Italy and abroad, handling all bureaucratic (and customs) procedures with maximum efficiency.
This way, our clients can focus on their core business, leaving the coordination of production and logistics to us.

Want to learn more?

Looking for a reliable partner for the full management of your projects? Rely on Metal’s and find out what we can do for you!

Stainless steel in products: how to increase its longevity

increase longevity complex stainless steel assemblies

Increasing the longevity of products and complex assemblies made from stainless steel is crucial for those aiming to offer high-quality products that withstand wear and time.

Steel is composed of varying amounts of metals such as iron and carbon, in addition to nickel and chromium. Chromium, in particular, creates a protective layer (also known as the “passive layer”), which is essential against corrosion. Despite stainless steel being a durable material that does not deteriorate easily, improper maintenance, incorrect cleaning, or an accident can damage the passive layer, ruin the surface, and lead to rust, stains, and even oxidation.

Therefore, it is ideal to act in two phases. The first is preventive, by scheduling one or more targeted and specific treatments during production based on the final use of the product. The second phase concerns post-sales. In this case, the end customer must take care of the stainless steel surface by always performing proper maintenance to make it last longer.

Throughout this article, we will understand the different possibilities for increasing the longevity of stainless steel. Let’s explore them together.

What can compromise the longevity of stainless steel?

Before answering this question, it is important to highlight that stainless steel is an alloy that is:

durable;
lightweight;
easy to clean;
low maintenance;
highly bacteria-resistant.

These characteristics make it an excellent option for producing high-quality stainless steel products and complex assemblies for various sectors, from the food industry to the pharmaceutical industry.

But how can such a durable alloy be compromised? Various factors can affect its robustness and damage the protective layer. Specifically, there are four different situations to consider:

Chemical contamination: Occurs when certain substances (found in chemical products like chlorides, for example, or through contact with saltwater) damage the protective shield of stainless steel, making it susceptible to corrosion.
Ferrous contamination: Occurs due to contamination with iron. Iron particles present on a surface or tool can deposit on the stainless steel, triggering galvanic corrosion.
Temperature and pollution: High temperatures can affect the quality of the metal and create darker areas on the outermost layer. Additionally, polluted air can contain substances that damage the protective layer and initiate corrosion.
Scratches and damages: During maintenance and cleaning, it is always advisable to use suitable products and materials to avoid scratching the protection provided by chromium.

Treatments to increase the longevity of stainless steel

To prolong the life of products and complex assemblies made with stainless steel, specific treatments can be considered to enhance stainless steel resistance and integrity.

Depending on various needs, different surface treatments for steel can be chosen, such as:

Galvanization: To protect metals from galvanic corrosion.
Metallization: To add a layer of material (and extra protection).
Anti-corrosion coatings and painting: To improve the resistance and robustness of the alloy with specific treatments and products.

At Metal’s, we can perform localized treatments that maintain the surface characteristics of the steel, which would otherwise be susceptible to erosion. However, these processes are carried out only upon explicit customer request or if required by law. For example, there are specific application sectors, such as the food and medical fields, where certain treatments – like galvanization and pickling by immersion (a localized electrochemical process) – are mandated by regulations.

In particular, complex assemblies designed for the HORECA sector require both brushing and pickling. For example, slicer welds for deli counters need cleaning and pickling in visible areas. However, the customer can request additional product assurance by pickling even the non-visible areas.

The benefits of stainless steel treatments

Whether required by law or requested by the customer, surface treatments on stainless steel offer numerous benefits. Besides increasing durability and resistance to corrosion and oxidation, they help to:

uniform the surface;
improve the aesthetics of the product;
eliminate imperfections, shadows, and other marks;
remove impurities.

The importance of routine maintenance to increase stainless steel longevity

Surface treatments on stainless steel are a crucial preventive phase that can extend the life of the stainless steel and the product.

The essential step is to always start with a good base product by evaluating only high-quality types of stainless steel. Once the product is manufactured and sold to the end customer, are there still measures to take to prevent potential damage?

Certainly, regular routine maintenance of the product is fundamental, inspecting the product periodically to detect any imperfections, signs of rust, or indications of corrosion. This allows for timely intervention before the material suffers more severe damage.

Additionally, regular deep cleaning of stainless steel surfaces is advisable, which may vary depending on the destination sector (i.e., with specific products and more or less frequent schedules). The recommendation is to use only non-abrasive cleaners and soft cloths to keep the metal surface intact, avoiding scratches as much as possible. It is also crucial to protect stainless steel from contact with corrosive substances (such as chlorides and aggressive chemicals) that can damage it and undermine its resistance and durability.

Want to know more?

Do you want to increase the longevity of your complex stainless steel assemblies and products? Discover how we can assist you: rely on our professionals and evaluate the benefits you can obtain for your processes.

Metal’s ecological footprint and the next steps for the environment

The environment is a topic close to our hearts. That’s why in 2024 at Metal’s we have decided to expand our Green Mission by initiating two new sustainability projects:

Measuring the Carbon Footprint to calculate the direct and indirect amount of carbon dioxide (CO2) we emit into the atmosphere daily.
Developing an LCA tool (Life Cycle Assessment) to understand the environmental impact of Metal’s products throughout their lifecycle.

These ambitious goals were detailed during the presentation of our biennial sustainable development plan, and they will help us offer maximum transparency to our customers and partners regarding our daily activities at Metal’s. In this article, we present the initial results from the Carbon Footprint analysis. The data pertain to the 2023 emissions and are essential for drafting the sustainability plan. Let’s take a look.

Metal’s commitment to sustainability: carbon footprint measurement results

As mentioned, the Carbon Footprint allows us to precisely determine the CO2 emissions of our organization for the year 2023. The calculation is based on the international “Greenhouse Gas Protocol” (GHGP) standard, a recognized standardized method in the “Corporate Standard” that classifies corporate emissions into 3 categories:

Scope 1: Direct emissions of the company, where all energy bill data or purchase invoices are analyzed to calculate the emissions generated by the organization through production processes and the corporate fleet.
Scope 2: Indirect emissions where supply contracts and GSE reports (used in photovoltaic systems) are compared to determine emissions originating from an external supplier.
Scope 3: Includes all other indirect CO2 emission sources related to the company’s business category (including the entire supply chain, goods transportation, business travel, investments).

Let’s examine the data that emerged for Metal’s, one by one.

Metal's sustainability results 2023
Category: Corporate

Scope 1: CO2 emissions produced by Metal’s in 2023

The data processing for 2023 revealed that our company emitted 153 tons of CO2. Specifically:

120 tons of natural gas
18 tons of gasoline for vehicles
15 tons of diesel for vehicles

Thus, natural gas, used for heating, contributes 78% to Scope 1 CO2 emissions.

Scope 2: What are the energy consumptions for 2023?

Two different approaches were used to measure the exact value for Scope 2:

Location-Based Approach: A traditional method considering the emissions of the energy mix of the region where the company is located (the mix can come from renewable sources, as well as nuclear, gas, or coal). This approach correctly represents the energy actually drawn from the grid.
Market-Based Approach: An alternative that considers only the electricity mix of the company’s supplier, not the regional electric grid mix. This approach accounts for the type of energy purchased, considering the potential purchase of renewable energy.

The first methodology best represents the source of energy drawn from the grid but doesn’t highlight alternative and renewable sources; conversely, the second calculation system showcases the company’s efforts towards a green alternative but isn’t exhaustive regarding the regional sources used. For a more complete result, it is best to consider both.

For Metal’s, the Carbon Footprint analysis for Scope 2 revealed the following 2023 emissions:

441 tons of CO2 (Location-Based Approach)
411 tons of CO2 (Market-Based Approach)

Scope 3: The purchase of raw materials is impactful

As anticipated, Scope 3 is based on parameters that vary according to the type of company. For Metal’s, the calculations were divided into two macro-categories:

Upstream Emissions: indirect emissions related to the purchase of goods or services (considering transport, waste, production scraps, leased assets, business travel, and commuting).
Downstream Emissions: focused on the emissions of sold products (including the transport of finished products to customers, product use, disposal, and investments).

For our organization, the analysis focused on these categories:

Purchased goods or services
Capital goods
Fuel- and energy-related activities
Upstream transportation and distribution
Waste and production scraps
Employee commuting
Downstream transportation and distribution

From the results, the Upstream category impacts Scope 3 emissions the most (with 99.6%). Here are the detailed percentages:

Purchased goods or services: 89% (mainly due to the purchase of raw materials like steel and auxiliary materials for producing semi-finished and complex assemblies)
Upstream transportation and distribution: 6%
Employee commuting: 3%
Waste and production scraps, fuel- and energy-related activities: 2%

The Downstream category, considering only the activities of transporting and distributing goods produced by Metal’s to the customer, stands at 0.4%.

Focusing on the analysis of Upstream category data:

The purchase of raw materials (particularly stainless steel) generated 3010 tons of CO2 (about 82%)
Packaging and auxiliary materials (such as paper, cardboard, wood for pallets, plastic for packaging, components for assemblies, abrasives for steel brushing, as well as financial, insurance, management services, maintenance, marketing, and outsourced work) impact 3% and 7% of the emissions linked to purchased materials.

What are the total emissions produced by Metal’s in 2023?

Summing up Scope 1, 2, and 3, Metal’s total CO2 emissions for 2023 are 4,716 tons. How should these numbers be interpreted, and what can be done to improve? Here are some plausible hypotheses, subject to technical feasibility evaluations in the sustainability plan to be drafted by the end of the year.

1. Finding New Solutions to Reduce Natural Gas Usage

Analyzing Scope 1 emission values (primarily from natural gas for heating and, to a lesser extent, from company vehicles) reveals that this data is relatively low compared to the total (120 tons of CO2 out of 4,716 tons total, including Scopes 1, 2, and 3).

To improve efficiency, we can consider other ecological heating systems to reduce emissions, such as using electric heat pumps and implementing an electric or hybrid vehicle fleet.

2. Focusing on renewable resources

Scope 2 emissions calculated with the two methods – Location-Based Approach and Market-Based Approach – show that the energy mix of the electricity supplier is already better than that of the national electric grid.

It is still possible to further reduce electricity-related emissions by installing new photovoltaic systems (in addition to those already existing at Metal’s) or purchasing more energy from renewable sources

3. Evaluating the purchase of more sustainable raw materials

For our company, the major source of CO2 emissions is Scope 3. In this case, steel purchase impacts the final percentage. For raw material procurement, Metal’s already relies on European suppliers and other entities sensitive to sustainability (reflecting our Green Mission). Our goal is to reduce the values identified in the Carbon Footprint. To achieve this, we will work on two fronts:

Collaborating with our suppliers to identify products with the lowest environmental impact.
Working with our customers to understand the importance of low-emission steel and evaluate their willingness to pay a premium for a sustainable, planet-friendly product.

A final note on waste and production scraps (a category identified within Scope 3). The emission percentage is very low (2%), but this category is strategic. By investing in scrap material, we can produce recycled steel to reduce emissions and increase product circularity.

In conclusion, every action will be decided by the end of the year during the drafting of the sustainability plan.

Want to know more?

If you care about the planet like we do and seek a serious partner already committed to developing sustainable practices, trust Metal’s. We can realize your projects, find out how!

Food-Grade Stainless Steel: What Types?

When talking about food-grade stainless steel, we refer to a particular alloy of stainless steel used in the beverage and food industry. It is primarily employed in this field because it prevents contamination and offers other significant advantages. But how many types of food-grade stainless steel exist, what are their characteristics, and how do they differ from other materials? In this article, we will answer all these questions.

Food-grade stainless steel: how to recognize it

Various types of stainless steel are available on the market, each suitable for specific industrial processes. In particular, the Centro Inox (Italian Association for the Development of Stainless Steels) identifies two major families:

Martensitic Stainless Steel: Durable, but with modest corrosion resistance (recommended for fasteners, cutting tools, and various machinery);
Austenitic Stainless Steel: Versatile, heat, and corrosion-resistant (used in the food and medical fields, such as for making stovetops);

Within these broad categories, there are further types of stainless steel that differ in their characteristics and specific properties. To recognize them, the AISI (American Iron and Steel Institute) designation, a nomenclature composed of three digits, is used. Specifically, the first digit determines the class of resistance, and the remaining digits indicate the materials used in the alloy.

Why this classification is necessary? This subdivision is necessary because not all stainless steel is the same. Each variety is characterized by specific properties that make it perfect for certain uses. Additionally, some industrial sectors, such as the food industry, must meet specific requirements. Let’s explore what these are in more detail.

The best types of food-grade stainless steel

When referring to the food and beverage sector, we talk about food-grade stainless steel, a colloquial term used to identify all materials that meet the very high hygiene standards required for these processes. Specifically, two alloys are used in this sector: AISI 316 and AISI 304. Here are the main characteristics and differences.

Food-grade stainless steel AISI 316

AISI 316 is an austenitic stainless steel that contains molybdenum, a transition metal that, when combined with steel, increases its hardenability, hardness, mechanical strength at high temperatures, and corrosion resistance (even when using acids and chlorides such as salt). It is a highly valuable material and withstands temperatures significantly higher than those required during food preparation.

Food-grade stainless steel AISI 304

AISI 304 refers to a stainless steel characterized by a chromium content ranging from 18% to 20% and a nickel content between 8% and 11%. Cheaper than AISI 316, it is often used in the food and beverage sector because it is compatible with most food products (it is better to avoid very acidic and corrosive ones). Additionally, it is notable for its resistance and its ability to withstand both high and low temperatures.

Are there differences between stainless steel and other types of steel?

What distinguishes stainless steel from other types of steel is the presence of chromium. Specifically, to be classified as stainless steel, it must contain at least 10.5% of this valuable chemical element. Its characteristic? Chromium creates a thin, transparent protective layer that enhances the stainless steel’s resistance compared to other steels available on the market.

This is why stainless steel is a more:

tough;
lightweight and easy to work with (even with laser technologies);
corrosion-resistant;
heat-resistant;
easy to clean and requires low maintenance (capable of ensuring the necessary hygiene for those working daily in the food sector).

Moreover, it does not require additional protective coatings (essential for some steel materials) and has high bacterial removability, preventing and avoiding food contamination through contact with the material.

How to choose the right food-grade stainless steel?

As we have seen, stainless steel is the best alloy for food processing. However, choosing the most suitable type depends entirely on your needs and the final use of the product. Therefore, it is necessary to evaluate, between AISI 316 and 304 stainless steels, which one meets all the necessary requirements. This includes considering the chemical composition of the food (paying attention to potentially corrosive elements) and the temperatures required during heating or refrigeration.

Regarding processing, at Metal’s, we have a constantly updated and state-of-the-art machine park that allows us to successfully complete any project, satisfying all functional, aesthetic, cost, and quality objectives set by the customer. Additionally, we specialize in particular processes such as brushing, essential for eliminating scratches and preserving the hygiene of the material.

At Metal’s, we specialize in processing stainless steel, including food-grade stainless steel. We have chosen to work exclusively with stainless steel to avoid contamination from foreign metals and to offer products that are safe for all food markets. Moreover, when projects involve working with different materials, we operate in separate processing environments to prevent any compromise of the stainless steel’s integrity.

Would you like to know more?

Discover how we can assist you in processing food-grade stainless steel. Trust our professionals and evaluate the benefits you can achieve for your operations.

Metal’s commitment: a biennial plan for sustainable development

At Metal’s, commitment to sustainability and the environment remains a top priority throughout 2024. Respect for the planet – and the community in which we operate – is a topic we deeply care about, and there are several projects we intend to undertake to further develop our Green Mission.

Furthermore, in recent years, attention towards these aspects has been very high, both in European and non-European markets. For example, some regulations have been introduced (such as the European directives CSRD and CSDDD to promote responsible corporate behavior towards the environment and human rights), which are pushing companies to move increasingly towards clear and transparent communication regarding environmental, social, and governance issues. Equally important, even the most attentive and demanding customers are interested in the environmental impact of production and the product itself.

For this reason, we have planned a series of initiatives aimed at developing an effective path for sustainable development. A path that we want to embark on from now on, even in the absence of a legal obligation, because we want to anticipate the times, provide our customers with increasingly precise and updated data on our activities, but above all because we want to set concrete goals in terms of ESG development.

The first project we have decided to undertake is aimed at measuring our current environmental impact. This is a fundamental operation to define the starting point for future actions and establish tangible improvement objectives.

So, we started with the calculation of our organization’s CO2 emissions, as well as the development of a tool that calculates the emissions required for the production of our clients’ products.

Metal’s and the environment: commitment for 2024

Indeed, there will be two significant projects in our green journey for the first half of 2024: measuring the company’s Carbon Footprint – started in January 2024 – and developing an LCA tool. All these activities will be carried out with the support of external companies specialized in this field. Let’s see how.

1. Measurement of the company’s Carbon Footprint

The measurement of the Carbon Footprint allows us to calculate the exact amount of carbon dioxide (CO2), both direct and indirect, that we release into the atmosphere every day.
The calculation of company emissions adheres to the international standard ‘Greenhouse Gas Protocol’ (GHGP), a global framework for the measurement and management of greenhouse gas (GHG) emissions derived from the operations of public or private entities. Everything is based on a standardized method – contained in the ‘Corporate Standard‘ guide – that classifies company emissions into categories:

Scope 1: corresponds to direct emissions generated by the company through production processes and the company fleet. To obtain the data, we analyze, for example, energy bills, various company invoices, consumption monitoring systems, also evaluating fuel usage and travel distances.
Scope 2: represents the data for indirect emissions, generated by an external supplier (both for electricity and thermal energy). To extract the necessary information to calculate it, we compare bills and supply contracts, or proceed with meter readings, inverter readings, and GSE reports (if there are photovoltaic systems).
Scope 3: considers all other forms of indirect emissions not included in Scope 2, such as: purchased goods, freight transport, business travel, investments. There are a total of 15 Scope 3 categories, to be evaluated based on the type of business.

The calculation therefore involves all areas of our operations and also involves our suppliers. Therefore, it requires a few months of development, but the results are expected by the end of this month (May 2024).

2. Development of an LCA (Life Cycle Assessment) tool for the products we produce

During the same period, we will also focus on the development of an LCA tool (Life Cycle Assessment). What is it? It’s a very important tool that will allow us to understand the impact of every product created at Metal’s throughout its entire life cycle, from the extraction of steel for semi-finished products (and any other raw materials associated with complex assemblies) to production, transportation, and delivery to our customer.

This way, we will be able to provide our customers with accurate and specific information for each product sold. To calculate the CO2 emissions of each item produced, a series of data will be analyzed. In particular, the tool will evaluate:

The type of steel and other materials used;
Internal and external manufacturing processes;
Transportation of raw materials to our facility;
Modes and transportation to our customers.

Again, to ensure the most accurate measurements possible, some operations will directly involve our suppliers.

Sustainability is a topic that we care deeply about

What we have just described is only the beginning of a long journey towards sustainability that we have decided to undertake some time ago and is part of our Green Mission. The real challenge, in the coming years, will be to implement all the necessary measures and interventions to further improve our performance in terms of ESG, namely environmental, social, and governance programs.

Today, at Metal’s, we can be satisfied with our path towards sustainability. In particular, we have:

Implemented an environmental management system (in accordance with the guidelines provided by ISO 14001 standards) to ensure constant monitoring of the environmental impact of our activities;
Upgraded our machinery park with increasingly efficient equipment;
Installed photovoltaic panels to utilize more energy from renewable sources;
Launched a new plant for nitrogen self-production.

In the social sphere, in addition to various welfare tools already in place to support workers and achieve a better work-life balance, we obtained ISO 45001 certification in 2018, which pertains to management systems for occupational health and safety.

But this is not enough for us: as long as there is room for improvement, at Metal’s, we will seek to adopt all necessary practices to do so, involving all stakeholders, both internal and external, with a comprehensive assessment of risks and opportunities in mind.

Do you want to know more?

If you care about sustainability like we do and are looking for a reliable partner already committed to developing good sustainable practices, trust Metal’s to bring your projects to life.

Metal’s case study: how we improved production with automated processing

At Metal’s, we manufacture assemblies, semi-finished products, parts and components in stainless steel, both simple and complex. We not only process stainless steel but also take care of the design and technical phases, advising our clients on potential improvements to optimize processing times or reduce production costs, obviously without affecting quality. Our work is full of challenges; we go beyond fulfilling our client’s orders and cover the entire logistical process. We always keep to the agreements, the budget and produce (or assemble) the desired quantities on time. In some cases, we even intervene ourselves, suggesting improvements to the client’s project to maximize production efficiency, thus limiting costs and accelerating delivery times.

Improved production efficiency through automated processing: a Metal’s case study

With a view to continuous improvement, whenever possible, we also propose improvements in the production process.

In particular, in the case outlined in this article, you can see how we can intervene to optimize the processing of a product, reducing working times and costs.

The case and the suggestion in brief: a significant modification to the production process to reduce costs and time

For a major client in the food industry, who has been relying on Metal’s for years to manufacture fryers and ovens, we evaluated a change in the welding process.
Prior to the innovation we proposed, this process was artisanal and involved human intervention. Therefore, we suggested a new type of processing that also met the customer’s need to improve the final product, while reducing costs and time.

Our proposal: choosing laser robot welding to reduce time and costs

Our engineering department proposed standardizing the processing by replacing manual labor with faster and cheaper robotic laser welding, and opting for a new interlocking system.

In fact, laser welding does not overheat surfaces as manual welding does, is more precise as it operates on a specific area, and is faster— a superior method for manufacturing fryers and ovens, two products with delicate stress requirements.

Know-how and technology

Having accepted the suggestion, the client was able to enjoy the benefits of choosing an innovative production process without additional investments, resulting in improved products both aesthetically and in terms of functionality.

Testing and prototypes to verify product quality

Before suggesting the automated processing option in this project, our engineering department evaluated all the actual benefits of the proposed solution by simulating different conditions. Through a series of tests, technicians confirmed the production benefits, discarding less convincing options and also evaluating the best choices to be adopted to reduce working time.

Confirmation that the new production process did not alter the appearance or quality of the already marketed products came only with the prototyping of the product. The prototype allowed the client to test the quality of the proposed solution, evaluating its aesthetics, functionality, and stability. Furthermore, we demonstrated that automated processing was faster, reducing potential material waste.

“For this particular project, our technical department took the initiative to show the client the advantages of automation, suggesting the transformation of the current manual process into an automated one. First, we explained to the client the benefits they could gain, both in terms of costs and production speed. The initial concern about this change, driven by uncertainty about the aesthetics and quality of the product, was quickly overcome by creating a prototype that demonstrated the product met all expected standards. The prototype was also useful for verifying the usability of the product, in addition to its robustness and functionality.” – Luca Regazzo, Technical Sales Manager.”

The benefits of automated processing

All modifications – whether requested by the client or proposed by Metal’s technical department – never affect the production process. When evaluating the introduction of a new processing method – as in this case study – or improvements to optimize costs, production, and processes, the processes proceed quickly to always meet the agreed timelines.

In this case, in particular, thanks to automation, times were even improved, and our client was able to benefit from the advantages of automated processing. Laser technology, in particular, offers accuracy, speed, and high processing performance, adapting well to complex surface treatments. Incorporating laser welding into this project allowed us to speed up the entire process, benefiting from more precise processing and reduced material waste, optimizing work quality and costs.

Today, at Metal’s, the machine park is equipped with state-of-the-art equipment, always operational, 24/7. The machine park continues to expand because our goal is to refine processing and provide our clients with the best opportunities in the market. In this case study, we’ve presented an example of what we can do for you with our knowledge and technologies to help you grow and improve your production.

Collaborative robots in the field of mechanical machining

Collaborative robots (or cobots) are designed to promote interaction between machines and humans in the production environment.

Conceived in the late 1990s by two professors from Northwestern University, J. Edward Colgate and Michael Peshkin, cobots have become increasingly efficient and safe. The Danish company Universal Robots introduced them to the market in the 2000s, selling the first product in 2008 and thereby paving the way for smart manufacturing.

But how does the collaboration between humans and machines take place? How do they differ from traditional robots? And can they truly enhance production? In this article, we will address all these questions.

Cobot Robot: what they are, differences from robots, and main characteristics

Collaborative cobots are innovative robots designed to facilitate cooperation and interaction between workers and machines. They can lighten the operator’s workload and support them in more risky and heavy tasks.

This collaboration is made possible by some fundamental characteristics that differentiate cobots from traditional robots, such as lightweight design and innovative features including safety sensors. On one hand, these features ease the integration of the machine into the workplace, and on the other hand, they enhance its (artificial) intelligence to improve and maximize productivity by automating almost all operations.

The main differences from traditional robots

Cobots differ from traditional robots in terms of flexibility and lightweight design. Traditional robots are typically massive, heavy, and stationed at a fixed position. They occupy large spaces, and people need to maintain a proper distance from them, respecting the boundaries set by safety barriers.

Collaborative robots, on the other hand, represent a true revolution in the world of industrial robotics. They are light, compact, and designed with an anthropomorphic design that mirrors some human features. For example, some cobots trace the features of the arm in their shapes, even copying its movements.

Cobots, furthermore, involve sharing space with people when the work areas allow it. They have been designed to enable workers to perform various operations in close proximity to the machine, and, following a risk analysis, in most cases, they are implemented without protective barriers, ensuring total safety.

As for productivity, traditional robots excel in handling large volumes but are characterized by high rigidity. Cobots, on the other hand, are flexible and easy to deploy even on different tasks.

The characteristics that make cobots unique

Collaborative robots can be integrated into a work environment more easily compared to traditional robots, which require specific spaces along with the protective barriers we have already mentioned. They are versatile and programmable to perform various tasks, especially strenuous ones, in challenging environments, automating tedious and repetitive operations for the worker.

The proximity between humans and machines is also a plus because it allows combining the worker’s experience with the precision and endurance of the cobot. Both will work on the same components but with different tasks, thereby increasing production and reducing error rates.

Moreover, these mechanical arms, thanks to their compact size, do not alter the production layout and are quick to install. They do not require special electrical modifications. Additionally, thanks to the simple and intuitive programming interface, cobots can seamlessly integrate into an existing production line, and all workers (even those without previous experience in collaborative robotics) can quickly set up their functions.

Finally, cobots consume minimal energy, minimizing waste.

In summary, cobots offer:

Innovative design
Flexibility
Lightweight structure and movements
Ease of programming
Increased safety
Compact size
Collaboration with workers

All these features make them unique and excellent allies for increasing productivity.

The “Safety Issue”

The safety of cobots is a topic that deserves further exploration. As mentioned earlier, most collaborative robots do not require the installation of barriers, but precautions are still necessary to ensure the absolute safety of personnel.

One of these precautions is speed limitation, as outlined in the Technical Standard UNI EN ISO 10218-2:2011, included in the Machinery Directive 2006/42/EC. The standard dictates that the cobot should be designed to modify its actions and movements based on human presence. This allows the machine to reduce its speed as soon as a person enters the workspace, returning to normal operation after the person exits.

All of this is made possible by sophisticated and reliable sensors and motion control systems that accurately and promptly detect human presence (and other obstacles) in the work area.
Furthermore, some cobots are equipped with additional safety features, such as a sensitive surface that immediately stops upon contact with people and restrictions on the orientation of tools in case an operator enters a risky area.

Collaborative robotics and industry: what future holds?

The industrial sector is becoming increasingly aware of the positive impact that cobots and, more broadly, collaborative robotics can offer in the workplace.

The collaboration between humans and machines can relieve workers from certain heavy, repetitive, and risky tasks, allowing them to focus on other activities. Additionally, cobots can be implemented in various projects to reduce overall time and costs, not to mention the energy savings in general consumption.

Equipped with highly sensitive sensors, cobots ensure maximum precision in all stages of the manufacturing process, guaranteeing quality and accuracy in production.

This is why the adoption of these new intelligent machines is a growing trend. The Interact Analysis Global Collaborative Robot Market – 2023 study estimates that “the size of the global collaborative robot market is expected to reach $10.8 billion by 2028, with a year-over-year growth of 40.1%.”

Why use cobot robots in the mechanical and metallurgical industries

As highlighted, integrating cobots into the machinery can improve and innovate production, with a primary focus on assisting operators in hazardous or heavy tasks.

Collaborative robotics can be easily employed in various sectors, including mechanical and metallurgical industries. This innovation aligns optimally with the needs of smart manufacturing, facilitating intelligent management of processes and human resources. Moreover, it allows companies to stay abreast of the times, offering products capable of meeting the evolving demands of the market.

In particular, in the mechanical and metallurgical sectors, cobots can enhance the precision of machining, minimizing the risks of errors. They are useful in the following phases:

Assembly: for assembling parts made of metal, plastic, and other materials; screwing and fastening various components.
Welding: for safely welding components using various methods (including laser technology)
Handling: to automate the loading and unloading of materials.

Collaborative robots are, therefore, cutting-edge technology that can improve business performance and the production process, not by replacing humans but by enhancing and refining their work.

In Metal’s, we are finalizing projects that involve the application of cobots to automate various phases of our process, particularly for performing operations such as:

MIG and TIG welding
Laser welding
Brushing
Capacitor discharge

Collaborative robotics can perfectly integrate into the existing production line to handle complex tasks requiring a high level of precision and quality. They can relieve operators from more strenuous tasks, improve finishes by increasing precision, and enhance consistency in production, further innovating our machinery.

Would you like to know more?

Rely on Metal’s for your projects: we produce and assemble systems, machines, and complete devices according to your plans, using state-of-the-art machinery to ensure production within agreed timelines.

On the way to Internorga

We’re thrilled to announce that starting tomorrow, we’ll be attending the renowned Internorga Trade Fair in Hamburg!

Internorga is the ultimate meeting point for the hospitality and food service industry, bringing together innovators, experts, and enthusiasts from around the globe.
From March 8th to March 12th, we’ll be welcoming visitors at Hall B7, Booth 516.
It will be a great opportunity for us to connect with industry leaders, explore emerging trends in the world of hospitality but above all to highlight how we can support businesses in the production of stainless steel components, assemblies and machine parts.

If you’re attending Internorga, stop by our booth!

See you in Hamburg!