A350 Grade LF3 Class 1 LF3 - ASTM A350/A350M-2018

Grade	A350 Grade LF3 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 LF3 Class 1 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Nb	More
Minimum Value	-	0.2	-	-	-	-	3.3	-	-	-	-	Cr+Mo≤ 0.32
Maximum Value	0.2	0.35	0.9	0.035	0.04	0.3	3.7	0.4	0.12	0.03	0.02	Cr+Mo≤ 0.32

A350 Grade LF3 Class 1 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
锻件	热处理	485~655	≥260	≥22	≥35	≤197
低温-101°C							≥20

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