20CrMo A30202 - GB /T 3077-2015

Grade	20CrMo
China ISC	A30202
Corresponding Standard	GB /T 3077-2015 Alloy Structure Steels
Classification	Alloy Steel
Properties	Good Forgability Good Machinability Good Weldability High Hardenability Carburizing Capability
Density	7.85 g/cm³

20CrMo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.17	0.17	0.4	-	-	0.8	-	-	0.15
Maximum Value	0.24	0.37	0.7	0.03	0.03	1.1	0.3	0.3	0.25

20CrMo Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d=15	Quenching + Tempering	≥885	≥685	≥12	≥50	≤197	≥78

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

China	France
GB	NF EN/NF
20CrMo	18CrMo4

20CrMo Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	20CrMo A30202
2	GB /T 3077-2015
	20CrMo A30202
3	GB /T 3078-2019
	20CrMo
4	GB /T 37601-2019
	20CrMo

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