Grade A350 Grade LF2 Class 1
Other Names
Corresponding Standard ASTM A350/A350M-2018
Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
Classification Alloy Steel
A350 Grade LF2 Class 1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo V Nb * More
Minimum Value - 0.15 0.6 - - - - - - - - Cu+Ni+Cr+V+Mo≤ 1.00;Cr+Mo≤ 0.32
Maximum Value 0.3 0.3 1.35 0.035 0.04 0.3 0.4 0.4 0.12 0.08 0.02
A350 Grade LF2 Class 1 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
Impact Energy Absorption
KV2
J
Forging Heat Treatment 485~655 ≥250 ≥22 ≥30 ≤197
Low Temperature -46°C ≥20

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