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UNS S31803


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%


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

Used in boilers and pressure vessels

Information is given for illustrative purposes only. Tachart accepts no responsibility for the accuracy of the data contained within or the use of the data by any other party.
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