A350 Grade LF2 Class 1 LF2 - ASTM A350/A350M-2026(a)

Grade	A350 Grade LF2 Class 1
Other Names
Corresponding Standard	ASTM A350/A350M-2026(a) 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	Cu+Ni+Cr+V+Mo≤ 1.00；Cr+Mo≤ 0.32

* By agreement, the limit for niobium (columbium) may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.

A350 Grade LF2 Class 1 Mechanical Properties

	Test Temperature	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
Forging		Heat Treatment	485~655	≥250	≥22	① ≥30	≤197
Standard Size [10 by 10 mm] Specimens								≥20

① For round specimens only

A350GradeLF2Class1 Corresponding Standards(Same grade name, different standards)

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