4140 H H41400 - ASTM A304-2016

Grade	4140 H
USA UNS	H41400
Corresponding Standard	ASTM A304-2016 Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
Classification	Alloy Steel

4140 H Chemical Element Composition Content (%)

Component	C	Si	Mn	Cr	Ni ^①	Cu ^①	Mo
Minimum Value	0.37	0.15	0.65	0.75	-	-	0.15
Maximum Value	0.44	0.35	1.1	1.2	0.25	0.35	0.25

Note: Standard H Steels can be produced with a lead range of 0.15-0.35 %. Such steels are identified by inserting the letter L between the second and third numerals of the grade designation, for example, 40L40 H. Lead is generally reported as a range of 0.15-0.35 %.

Approximate Comparison Table Hardenability Guaranteed Structural Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Russia

Sweden

United Kingdom

ISC

CNS

JIS

ASTM

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

42CrMoH

A30425

SCM440H

4140H

H41400

42CrMo4H

42CrMo4

1.7225

42CrMo4
(40CD4)

≈38ХМ

2244

42CrMo4

4140H Corresponding Standards(Same grade name, different standards)

1	ASTM A 304-2004
	4140H H41400
2	SAE J 1268-2010
	4140H H41400
3	ASTM A304-2016
	4140 H H41400

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