Grade S2 629-590 Cat2
Corresponding Standard BS 3059-2-1990
Steel Boiler and Superheater Tubes - Part 2. Specification For Carbon, Alloy and Austenitic Stainlesssteel Tubes with Specified Elevated Temperature Properties
Classification Alloy Steel
Density 7.73 g/cm3
S2 629-590 Cat2 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni * Cu * Mo Al Sn *
Minimum Value - 0.25 0.3 - - 8 - - 0.9 - -
Maximum Value 0.15 1 0.6 0.03 0.03 10 0.3 0.25 1.1 0.02 0.03
S2 629-590 Cat2 Mechanical Properties
condition Test Temperature Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Steel pipe Room Temperature 590~740 ≥400 ≥18
Steel pipe Normalizing + Tempering Rp0.2≥322
Steel pipe Normalizing + Tempering Rp0.2≥316
Steel pipe Normalizing + Tempering Rp0.2≥311
Steel pipe Normalizing + Tempering Rp0.2≥290
Steel pipe Normalizing + Tempering Rp0.2≥235

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