New ferritic stainless steel with smart Nb alloying

Therma 4622Nb™
Enhanced high temperature creep resistance above 1 000 °C

Heat-resistant ferritic: Therma 4622Nb™

Now available from Outokumpu: Therma 4622Nb™ dual stabilized ferritic stainless steel, with enhanced high-temperature creep resistance above 1 000 °C due to alloying of niobium and silicon. Thanks to its high chromium content, Therma 4622Nb™ also offers improved resistance to corrosion.

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Victor Messerschmidt, Sales Development Manager at Outokumpu.

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Victor Messerschmidt
Sales Development Manager at Outokumpu
victor.messerschmidt (@)

Typical applications of Therma 4622Nb™

  • Energy production
  • Automotive
  • Exhaust systems
  • Furnaces
  • Annealing boxes
  • Air heaters
  • Burner nozzles

Therma 4622Nb™ is available as cold rolled coil and sheets and in thicknesses of 0.5 – 2 mm with widths up to 1250 mm.

Benefits of Therma 4622Nb™

Therma 4622Nb™ offers a wide performance range thanks to its unique characteristics. Discover the benefits.

Excellent high temperature properties

Performance in high temperatures: good stability against thermal fatigue and excellent high temperature creep resistance.

Competitive and stable price

Excellent cost stability compared to Ni-alloyed austenitic grades and Mo-alloyed acid proof grades.

Good corrosion resistance

Corrosion resistance comparable to common austenitic grades 304 and 304L.

Good formability

Thanks to the good material characteristics, all forming methods can be used.

Good weldability

Low risk of sensitization owing to stabilization. Less distortion than in austenitic grades due to higher heat transfer.

Good machinability

Lower work hardening than austenitic grades, enabling faster machining times and longer tooling life.

Outokumpu’s new high-temperature, price-stable Therma 4622Nb™ grade ready to roll

Introduced in early 2024, Therma 4622Nb™ is is ideal for price-sensitive applications that require excellent high-temperature properties and good corrosion resistance combined with good weldability, formability, and machinability. Find out more in our article.

Read more

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.

Contact us for a quote

Would you like to find out more about Therma 4622Nb™, or request a quote? Click below to contact our experts for a discussion.

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Meet Core 4622

Stabilized, nickel-free 21% chromium ferritic stainless steel: a competitive alternative to 304L/4307 in a wide range of applications.

Thank you for your interest in Outokumpu.

I will contact you as soon as possible.

Best wishes,
Victor Messerschmidt

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