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Duplex
Duplex (1.4462 / UNS S31803) has a two-phase microstructure of ferrite and austenite. This makes the material extremely strong and highly resistant to stress corrosion cracking and pitting. Super Duplex (1.4410) offers even higher performance for extremely aggressive environments.
Key Properties
- Twice the yield strength of 316 SS
- Excellent resistance to stress corrosion cracking
- Good weldability and machinability
- High fatigue resistance
Industrial Applications
Duplex stainless steel combines the best properties of ferritic and austenitic stainless steel. It is twice as strong as 316 stainless steel.
Oil & Gas Industry
Paper & Pulp Industry
Chemical Tankers
Bridges & Constructions
Frequently Asked Questions
What is the difference between Duplex and Super Duplex?
Super Duplex has a higher chromium, molybdenum, and nitrogen content, resulting in even higher corrosion resistance (PREN > 40) and strength than standard Duplex.
Is Duplex magnetic?
Yes, unlike austenitic stainless steel (like 304/316), Duplex is magnetic due to the ferritic portion in the structure.
Can you produce Duplex to specification?
We produce specials and turned parts in Duplex and Super Duplex (1.4462 / 1.4410) to your specification.
Need Duplex Stainless Steel?
For the toughest conditions, Duplex and Super Duplex are a frequently requested choice. Send us your drawing or specification, then we will produce your part to order.
