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Therma 22FC™
Ferritic stainless steel for SOFC and SOEC bipolar separator plates

Long-lasting choice for fuel cells and electrolyzers

Therma 22FC™ is Outokumpu's solution to the emerging solid oxide fuel cell (SOFC) and solid oxide electrolyzer cell (SOEC) technology. It’s a stabilized nickel-free, high-chromium ferritic stainless steel, offering a cost-effective solution for a long lifetime.

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Benefits of Therma 22FC™

Our customized high-chromium ferritic stainless steel grade offers a perfect match for the construction of both SOFC and SOEC systems.

Long-term durability

The durability of Therma 22FC™ ensures reliable operation over a long service life.

Creep resistance

Therma 22FC™ offers high creep resistance at high temperatures, suitable for cell stacks.

Low thermal expansion coefficient

Thermal expansion on similar level as the typical coating materials helps to minimize thermal stresses during the heating up and cooling down stages of the SOFC/SOEC.

Corrosion resistance in a dual atmosphere

Therma 22FC™ offers high resistance to hydrogen and other fuel gases such as methane.

Low and stable electrical resistivity

The fine-tuned chemical composition ensures stable and low electrical resistivity over the whole lifecycle.

Resistance to the evaporation of elements

High chromium Therma 22FC™ offers resistance to evaporation of elements like chromium.

Formability

Therma 22FC™ offers good forming properties and is easy to process in stack part production.

Reliable expert partner

Therma 22FC™ is produced with Outokumpu’s process knowhow that enables the alloying elements to be closely controlled to maintain the composition within strict limits.

Completing the hydrogen circle

Hydrogen Circle plays a central role in the transition toward a low-carbon economy, offering a clean alternative to fossil fuels across multiple sectors including transportation, industry, and energy storage.

At the heart of the hydrogen circle is green hydrogen, produced through electrolysis powered by renewable energy sources such as wind or solar. This process splits water into hydrogen and oxygen without emitting carbon dioxide, making it environmentally friendly. Unlike traditional low-temperature electrolysis, SOECs benefit from thermal energy, which can be sourced from industrial waste heat or renewable sources like concentrated solar power, making SOECs the most efficient technology for clean hydrogen production in such cases.

This makes SOECs ideal for integration into energy-intensive sectors aiming to decarbonize operations. Once produced, hydrogen can be stored in tanks or pipelines and transported to where it’s needed. Hydrogen is versatile in its applications. It can be used in fuel cells to generate electricity for vehicles, buildings, or grid support. In industrial processes, it serves as a clean feedstock for steel production, ammonia synthesis, and refining. When hydrogen is consumed in fuel cells, the only byproduct is water—completing the circle without harmful emissions.

Therma 22FC™ stainless steel: ready to power the hydrogen economy

Our comprehensive technical guide delves into the unique advantages of Therma 22FC™, including its increased electrical conductivity, compatibility with various coating systems, and excellent formability.

Learn how this high-chromium ferritic stainless steel can enhance your SOEC/SOFC stacks and support the growing hydrogen economy.

Download the guide now for valuable insights and technical specifications.

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Why choose Outokumpu?

We bring our expertise to the service of society at large, and that is realized by the capability and dedication of our people. A strong customer focus, sustainability and technical excellence are at the heart of everything we do. As a customer, you benefit from our extensive R&D and technical support throughout the entire product development process. We are constantly inspired by stainless steel and excited by its possibilities. We always will be.

Sustainable action for future generations

Global megatrends such as population growth, mobility and urbanization have resulted in unprecedented economic growth and prosperity. At the same time, these megatrends have resulted in massive problems related to increasing carbon emissions and overall climate change. Stainless steel has a crucial role in decarbonization. With the lowest carbon footprint in the industry, Outokumpu is dedicated to help customers reduce emission across their value chain.

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Would you like to find out more about the benefits of Therma 22FC™? Let us connect you with one of our experts.

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Outokumpu team

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