4145 H H41450 - ASTM A304-2020

Grade	4145 H
USA UNS	H41450
Corresponding Standard	ASTM A304-2020 Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
Classification	Alloy Steel

4145 H Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^①	Cu ^①	Mo
Minimum Value	0.42	0.15	0.65	-	-	0.75	-	-	0.15
Maximum Value	0.49	0.35	1.1	0.035	0.04	1.2	0.25	0.35	0.25

NoTE：Standard \"H\" Steels can be produced with a lead range of 0.15 to 0.35 %. Such steels are identified by inserting the letter \"L\" between the second and third numerals of the grade designation, for example, 41L40 H. Lead is generally reported as a range of 0.15 to 0.35 %.

① Residual Elements.

4145H Corresponding Standards(Same grade name, different standards)

1	SAE J 1268-2010
	4145H H41450 4145H
2	ASTM A304-2016
	4145 H H41450
3	ASTM A304-2020
	4145 H H41450

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