18CrMo4 1.7243 - DIN EN 10084-2008

Grade	18CrMo4
Germany W-Nr.	1.7243
Corresponding Standard	DIN EN 10084-2008 Case Hardening Steels – Technical Delivery Conditions
Classification	Alloy Steel

18CrMo4 Chemical Element Composition Content (%)

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

18CrMo4 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
All product shapes	Soft Annealing (+A)	≤207
Bar, wire, flat steel, forging	Processed to a Certain Hardness (+TH)	156~207
Bar, forging	Processed to Ferrite-Perlite Structure (+FP)	140~187

New and Old Grade Replacement List

1 Approximate Comparison Table Hardenability Guaranteed Structural Steel

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Russia

United Kingdom

ISC

CNS

JIS

ASTM

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

20CrMnH

A30205

SCM420H

4118H

H41180

18CrMo4H

18CrMo4

1.7243

18CrMo4
(20CD4)

20ХМ

18CrMo4

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

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

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