Duplex 2205

UNS S31803, S32205

Alloy 2205 gets the name Duplex because it is composed of two different types of grains. 40-50% of its grain structure is austenite and 50-60% of it is ferrite. It is closely related to, but much more popular than Alloy 255. In most environments, it surpasses 317L in crevice corrosion resistance. Alloy 2205 excels in chloride environments and resists hydrogen sulfide. Alloy 2205 has almost twice the strength of 316L. Due to the lower nickel and molybdenum content, it is less costly than Alloy C276. Among the places where Alloy 2205 is used include pressure vessels, heat exchangers and scrubbing systems.

Alloy 2205 Fasteners


  • Plate: ASTM A240
  • Bar: ASTM A276

Material Properties

Material Properties: 2205 Stainless Steel

Technical Data Sheet

Industries & Applications

Ready to order or have questions?

What Our Customers Are Saying About Nickel Systems