18CrMo4 - ISO 683-3-2019

Grade	18CrMo4
Corresponding Standard	ISO 683-3-2019 Heat-treatable steels,alloy steels and free-cutting steels--Part 3: Case-hardening steels
Classification	Alloy Steel

18CrMo4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo
Minimum Value	0.15	0.15	0.6	-	-	0.9	-	0.15
Maximum Value	0.21	0.4	0.9	0.025	0.035	1.2	0.4	0.25

1 Approximate Comparison Table Structural Alloy Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

European Standard

Russia

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

Numerical Grade

GOST

BS EN/BS

20CrMo
20CrMoH

A30202

SCM420

SCM420
SCM418
SCM418H

SCM420

4118
4120

G41180

18CrMo4

20CrMo5

1.7264

18CD4

18CrMo4

1.7243

20ХМ

CDS12

2 Approximate Comparison Table Structural Alloy Steel

Japan	International Organization for Standardization	Germany	France	European Standard		Russia	United Kingdom
JIS	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
SCM418	18CrMo4	18CrMo4	18CD4 18CrMo4	18CrMo4	1.7243	20KHM	708H20 708M20

3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
18CrMo4	18CrMo4	1.7243

18CrMo4 Corresponding Standards(Same grade name, different standards)

1	EN 10084-1998
	18CrMo4 1.7243
2	ISO 683-11-1987
	18CrMo4 18CrMo4H 7 18CrMo4HH 18CrMo4HL
3	EN 10263-3-2001
	18CrMo4 1.7243
4	EN 10250-3-1999
	18CrMo4 1.7243
5	DIN EN 10263-3-2018
	18CrMo4 1.7243
6	EN 10263-3-2017
	18CrMo4 1.7243
7	DIN EN ISO 683-3-2019
	18CrMo4
8	ISO 683-3-2019
	18CrMo4
9	DIN EN 10084-2008
	18CrMo4 1.7243
10	ISO 683-11-2012
	18CrMo4
11	ISO 4954-2018
	18CrMo4
12	UNI 8550-1984
	18CrMo4
13	NF EN 10084-2008
	18CrMo4 1.7243 (18CD4)
14	ISO 4954-1-2024
	18CrMo4

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