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Grade A517 Grade B
Corresponding Standard ASTM A517/A517M-2017(R2023)
Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered
Classification Alloy Steel
A517 Grade B Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Mo Ti V B
熔炼 Minimum Value 0.15 0.15 0.7 - - 0.4 0.15 0.01 0.03 0.0005
Maximum Value 0.21 0.35 1 0.025 0.025 0.65 0.25 0.04 0.08 0.005
  Component C Si Mn P S Cr Mo Ti V B
成品 Minimum Value 0.13 0.13 0.64 - - 0.36 0.12 0.01 0.02 0.0005
Maximum Value 0.23 0.37 1.1 0.025 0.025 0.69 0.28 0.05 0.09 0.005
A517 Grade B Mechanical Properties
thickness
t
mm		 Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
t≤65 795~930 ≥690 L0=50mm: ≥16 ≥35 (Rectangular)
≥45 (Circular)
65＜t≤150 725~930 ≥620 L0=50mm: ≥14 ≥45 (Circular)

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