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S31803

Alias

UNS S31803
ASTM A812

Chemistry

Duplex Stainless Steel
Base Element Fe (Iron)

Element Min Max
C (carbon) 0.03%
Cr Chromium) 21% 23%
Mn (manganese) 2%
Mo (molybdenum) 2.5 3.5%
N (Nitrogen) 0.08% 0.2%
Ni (Nickel) 4.5% 6.5%
P (Phosphorus) 0.03%
S (Sulphur) 0.02%
Si(Silicon) 1%
Mechanical Properties Min Max
Ultimate Tensile Strength (UTS) 620 MPa
Yield Strength 420 MPa
Elongation 25%
Hardness(Brinell) 290HS
Reduction of Area 45%

Uses

Bolting
Commonly used in the Paramedical and biotechnological industries in chloride pitted environments, for its corrosion resistance.

Used in boilers and pressure vessels

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