A320 L7M - ASTM A320/A320M-2021

Grade	A320 L7M
Corresponding Standard	ASTM A320/A320M-2021 Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
Classification	Alloy Steel

A320 L7M Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.38	0.15	0.75	-	-	0.8	0.15
Maximum Value	0.48	0.35	1	0.035	0.04	1.1	0.25

A320 L7M Mechanical Properties

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
Quenching and tempering, minimum tempering temperature 620°C	≥690	≥550	≥18	≥50	≤235

A320L7M Corresponding Standards(Same grade name, different standards)

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