20Cr A20202 - GB /T 11251-2020

Grade	20Cr
China ISC	A20202
Corresponding Standard	GB /T 11251-2020 Alloy Structural Steel Plate and Strip
Classification	Alloy Steel
Properties	Machinability Carburizing Ability
Density	7.83 g/cm³

20Cr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.18	0.17	0.5	-	-	0.7	-	-	-
Maximum Value	0.24	0.37	0.8	0.03	0.03	1	0.3	0.3	0.1

• The composition shall comply with the provisions of GB/T 3077-2015

20Cr Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Annealing	400~650	≥20

• The surface Brinell hardness of steel plates delivered in a high-temperature tempered state shall comply with the provisions of GB/T 3077-2015

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

20Cr 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"!