Grade SA204 Grade A
Corresponding Standard ASME SA-204/SA-204M-2023
Pressure Vessel Plates, Alloy Steel, Molybdenum
Classification Alloy Steel
SA204 Grade A Chemical Element Composition Content (%)
  Component C Si Mn P S Mo
板厚t<25 Minimum Value - 0.15 - - - 0.45
Maximum Value 0.18 0.4 0.9 0.025 0.025 0.6
  Component C Si Mn P S Mo
25<t≤50 Minimum Value - 0.15 - - - 0.45
Maximum Value 0.21 0.4 0.9 0.025 0.025 0.6
  Component C Si Mn P S Mo
50<t≤100 Minimum Value - 0.15 - - - 0.45
Maximum Value 0.23 0.4 0.9 0.025 0.025 0.6
  Component C Si Mn P S Mo
t>100 Minimum Value - 0.15 - - - 0.45
Maximum Value 0.25 0.4 0.9 0.025 0.025 0.6
SA204 Grade A Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
450~585 ≥255 L0=200mm: ≥19
L0=50mm: ≥23

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