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ASTM A240/A240M Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Duplex (Austenitic-Ferritic) steel
UNS Designation : S31803
Chemical Composition Requirements, %
C: ≤0.030
Mn: ≤2.00
P: ≤0.030
S: ≤0.020
Si: ≤1.00
Cr: 21.0-23.0
Ni: 4.5-6.5
Mo: 2.5-3.5
N: 0.08-0.20
Mechanical Test Requirements
Tensile Strength: ≥620Mpa
Yield Strength: ≥450MPa
Elongation in 2 in. or 50 mm: ≥25%
Hardness:
Brinell: ≤293
Rockwell (C scale): ≤31
Cold bend: not required
Contact Person: Mr. Sam Cui
Tel: +86 130 3189 1590
