Duplex 2205

UNS S32205 stainless
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Standard duplex (austenite + ferrite) stainless with twice the yield strength of 316L and excellent resistance to stress corrosion cracking. Widely used in offshore oil and gas and desalination.

Applicable Standards

  • ASTM A790
  • EN 1.4462
  • UNS S32205

Composition Ranges (wt %)

Element Min (%) Max (%) Typical Range
Fe 59.0 67.0 ~63.0
Cr 22.0 23.0 ~22.5
Ni 4.5 6.5 ~5.5
Mo 3.0 3.5 ~3.25
N 0.14 0.2 ~0.17
C — 0.03 ~0.01
Fe 59.0–67.0% Cr 22.0–23.0% Ni 4.5–6.5% Mo 3.0–3.5% N 0.14–0.2% C 0.0–0.03%

Typical Applications

  • Offshore pipelines
  • Desalination
  • Heat exchangers
  • Storage tanks
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