USA UNS S21400
ASTM
Specification or Grade
XM-31
Corresponding Standard ASTM A959-2019
Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Classification Austenitic Stainless Steel
Properties Corrosion Resistance
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni N
Minimum Value - 0.3 14 - - 17 - 0.35
Maximum Value 0.12 1 16 0.045 0.03 18.5 1 -
• Unless otherwise indicated, a grade designation originally assigned by the American Iron and Steel Institute (AISI).

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