Duplex Stainless Steel
Duplex Stainless Steel, also known as austenitic-ferritic stainless steel, combines the best of both worlds with equal proportions of ferrite and austenite. This unique microstructure leads to higher strength and exceptional resistance to stress corrosion cracking. Chromium, nitrogen, and molybdenum work together to provide excellent protection against both local and uniform corrosion. Additionally, duplex stainless steel offers excellent weldability.
Discover the Three Groups of Modern Duplex Stainless Steels:
- Lean Duplex such as LDX2101, an economical alternative to 300 series stainless steels.
- Standard Duplex such as 2205, the go-to grade for over 80% of duplex applications.
- Super Duplex like Ferralium 255, Zeron 100, and 2507, ideal for corrosive environments like offshore and marine applications.
Duplex 2205 is the most popular of all the duplex grades, but for extreme corrosive conditions like offshore and marine, super duplex steel 2507 and Zeron 100 are the way to go. If you’re looking for a budget-friendly option, go for Lean Duplex 2101 which is a cost-effective alternative to the 300 family stainless steels.
Duplex Steel 2205
Duplex 2205 / UNS S31803 & UNS S32205 / W.Nr. 1.4462
Duplex Stainless steel 2205 is not just austenitic, like 304 stainless, nor purely ferritic, like 430 stainless, it’s a perfect blend of both, making it a versatile choice for various applications.
Super Duplex 2507
Duplex 2507 / UNS UNS S32750 / W.Nr. 1.4410
Super Duplex Stainless Steel 2507 is an alloy with exceptional strength and resistance to corrosion. With a composition of 25% chromium, 4% molybdenum, and 7% nickel, it offers resistance to chloride pitting and crevice corrosion.