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USA UNS S31200
Corresponding Standard ASTM A240/240M-2018
Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and General Applications
Classification Duplex Stainless Steel
Properties Corrosion Resistance
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N
Minimum Value - - - - - 24 5.5 1.2 0.14
Maximum Value 0.03 1 2 0.045 0.03 26 6.5 2 0.2
Mechanical Properties
condition Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Thick plates, thin plates, strip products ≥690 ≥450 ≥25 HBW: ≤293
HRC: ≤31
Approximate Comparison Table Austenitic-Ferritic Stainless Steel
China United States International Organization for Standardization Germany France European Standard
GB ISC UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade
022Cr25Ni6Mo2N S22553 S31200 X3CrNiMoN 27-5-2 4460-312-00-I X3CrNiMoN 27-5-2 1.4460 X3CrNiMoN 27-5-2 X3CrNiMoN 27-5-2 1.4460

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