USA UNS S31730
Corresponding Standard ASTM A213/A213M-2019
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
Classification Austenitic Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo N
Minimum Value - - - - - 17 15 4 3 -
Maximum Value 0.03 1 2 0.04 0.01 19 16.5 5 4 0.045
Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
≥480 ≥175 ≥35 HRB
≤90

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