USA UNS S31655
Corresponding Standard ASTM A249/A249M-2018
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
Classification Austenitic Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo N
Minimum Value - - - - - 19.5 8 - 0.5 0.14
Maximum Value 0.03 1 2 0.045 0.015 21.5 9.5 1 1.5 0.25
Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
Solutioning Temperature 1040℃ ≥635 ≥310 ≥35 HRB
≤100

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