A320 L7 - ASTM A320/A320M-2024(a)

Grade	A320 L7
Corresponding Standard	ASTM A320/A320M-2024(a) Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
Classification	Alloy Steel

A320 L7 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

* Typical steel compositions used for this grade include 4140, 4142, 4145, 4140H, 4142H, and 4145H.

A320 L7 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Quenching and Tempering, Minimum Tempering Temperature 593℃	≥860	≥725	≥16	≥50	HBW：≤321 or HRC：≤35

A320L7 Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!