G41400 - ASTM A29/A29M-2012

USA UNS	G41400
ASTM Specification or Grade	4140
Corresponding Standard	ASTM A29/A29M-2012 Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification	Alloy Steel
Properties	Strength Impact Toughness Quench Hardness

Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni ^②	Cu ^②	Mo	More
Minimum Value	0.38	0.15	0.75	-	-	0.8	-	-	0.15	③
Maximum Value	0.43	0.35	1	0.035	0.04	1.1	0.25	0.35	0.25	③

Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
t=25	Quenching + Tempering ≥1080	Quenching + Tempering ≥930	Quenching + Tempering ≥12	HB ≤217

1 Approximate Comparison Table Structural Alloy Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

European Standard

Sweden

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

Numerical Grade

SS₁₄

BS EN/BS

42CrMo

A30422

SCM440

SCM440
SCM440H

SCM440

4140
4142

G41400
G41420

42CrMo4

1.7225

42CD4

42CrMo4

1.7225

2244

708M40

2 Approximate Comparison Table Cold Heading Steel

China		United States		International Organization for Standardization	Germany		France
GB	ISC	ASTM/AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF
ML42CrMo	A30424	4140 A320ML7M	G41400	42CrMo4E (C32)	42CrMo4	1.7225	42CD4

3 Approximate Comparison Table Alloy Steel for Quenching and Tempering

United States	International Organization for Standardization	Germany	France	European Standard
ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade
4140	42CrMoS4	42CrMoS4	42CD4u	42CrMoS4	1.7227

4 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

5 Approximate Comparison Table Structural Alloy Steel

Japan	United States		Germany		France	European Standard	Russia	United Kingdom
JIS	ASTM/AISI	UNS	DIN EN/DIN	W-Nr.	NF EN/NF	EN	GOST	BS EN/BS
SCM440	4140 4142 6135	G41400	41CrMo4	1.7223	42CD4TS	41CrMo	40ХФА 40KHFA	3111-5/1 42CrMo4 708M40

6 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	Japan	United States	International Organization for Standardization	European Standard
GB	JIS	ASTM	ISO	EN
ML40CrMo	SCM440	4140	42CrMo4	42CrMo4

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