4142 - ASTM A519/A519M-2024

Grade	4142
Corresponding Standard	ASTM A519/A519M-2024 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
Classification	Alloy Steel

4142 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu ^*	Mo
Minimum Value	0.4	0.15	0.75	-	-	0.8	-	-	0.15
Maximum Value	0.45	0.35	1	0.04	0.04	1.1	0.25	0.35	0.25

1 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
42CrMo	SCM440H	4140 4142	42CrMo4	42CrMo4	42CD4	42CrMo4	1.7225	35KHM 38KHM	2244	708M40 CFS11

2 Approximate Comparison Table Structural Alloy Steel

3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		United States	International Organization for Standardization	European Standard
YB	GB	ASTM	ISO	EN
QML42CrMo	ML40CrMo	4142	42CrMo4	42CrMo4

4142 Corresponding Standards(Same grade name, different standards)

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