SCr420 SCr 22 - JIS G 4104-1979

Grade	SCr420
Old Grade
Corresponding Standard	JIS G 4104-1979 Chromium Steels
Classification	Alloy Steel

SCr420 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.18	0.15	0.6	-	-	0.9	-	-
Maximum Value	0.23	0.35	0.85	0.03	0.03	1.2	0.25	0.3

SCr420 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
Double Quenching and Tempering	≥834	≥14	≥35	235~321	≥49

New and Old Grade Replacement List

Corresponding Standard	Grade
JIS G 4104-1979	Grade Old Grade
JIS G 4053-2003	Grade
JIS G 4053-2016	Grade

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

20Cr
20CrH

A20202

SCr420

SCr420
SCr420H
SCR420HRCH

SCr420

5120

G51200

20Cr4

1.7027

18C3

20Cr4

1.7027

20Х

527A20

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		Japan	United States	International Organization for Standardization
YB	GB	JIS	ASTM	ISO
QML20Cr	ML20Cr	SCr420	5120	20Cr4

SCr420 Corresponding Standards(Same grade name, different standards)

1	JIS
	SCr420
2	JIS G 4053-2003
	SCr420
3	JIS G 4053-2016
	SCr420
4	JIS G 4104-1979
	SCr420 (SCr 22)

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