Grade SA841 Grade B
Corresponding Standard ASME SA-841/SA-841M-2023
热机械控制工艺(TMCP)生产的压力容器用钢板
Classification Alloy Steel
SA841 Grade B Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Ni Cu Mo V Nb Al
t≤40mm Minimum Value - 0.15 0.7 - - - - - - - - 0.02
Maximum Value 0.15 0.5 1.35 0.03 0.025 0.25 0.6 0.35 0.3 0.06 0.03 -
  Component C Si Mn P S Cr Ni Mo V Nb Al
t>40mm Minimum Value - 0.15 1 - - - - - - - 0.02
Maximum Value 0.15 0.5 1.6 0.03 0.025 0.25 0.6 0.3 0.06 0.03 -
SA841 Grade B Mechanical Properties
thickness
t
mm
Mark
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
t≤40 Class 1 485~620 ≥345 L0=50mm:≥22
L0=200mm: ≥18
40<t≤65 Class 1 485~620 ≥345 L0=50mm:≥22
L0=200mm: ≥18
t>65 Class 1 450~585 ≥310 L0=50mm:≥22
L0=200mm: ≥18
t≤40 Class 2 550~690 ≥415 L0=50mm:≥22
40<t≤65 Class 2 550~690 ≥415 L0=50mm:≥22
t>65 Class 2 515~655 ≥380 L0=50mm:≥22

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