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Grade A707 Grade L5 Class2
Corresponding Standard ASTM A707/A707M-2019
Forged Carbon and Alloy Steel Flanges for Low- Temperature Service
Classification Alloy Steel
A707 Grade L5 Class2 Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Ni Cu Mo V Nb
熔炼分析 Minimum Value - - 0.4 - - 0.6 0.7 1 0.15 - -
Maximum Value 0.07 0.35 0.7 0.025 0.025 0.9 1 1.3 0.25 0.05 0.03
  Component C Si Mn P S Cr Ni Cu Mo V Nb
成品分析 Minimum Value - - 0.35 - - 0.56 0.67 0.95 0.14 - -
Maximum Value 0.09 0.37 0.75 0.03 0.035 0.94 1.03 1.35 0.28 0.06 0.02
A707 Grade L5 Class2 Mechanical Properties
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
≥455 ≥360 ≥22 ≥40 149~217 -80°F (-62°C)
Average of 3 samples: ≥54
Single sample: ≥43

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