40Cr A20402 - GB /T 11251-2020

Grade	40Cr
China ISC	A20402
Corresponding Standard	GB /T 11251-2020 Alloy Structural Steel Plate and Strip
Classification	Alloy Steel
Properties	Low-Temperature Resistance Good Machinability High Hardenability
Density	7.85 g/cm³

40Cr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.37	0.17	0.5	-	-	0.8	-	-	-
Maximum Value	0.44	0.37	0.8	0.03	0.03	1.1	0.3	0.3	0.1

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

40Cr Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Annealing	550~800	≥16

• 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

Sweden

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

Numerical Grade

GOST

SS₁₄

BS EN/BS

40Cr

A20402

SCr440

SCr440
SCr440H

SCr440

5140

G51400

41Cr4

1.7035

42C4

41Cr4

1.7035

40Х

2245

530A40
530M40

40Cr Corresponding Standards(Same grade name, different standards)

1	GB
	40Cr
2	GB /T 3077-1999
	40Cr A20402
3	GB /T 17107-1997
	40Cr
4	GB /T 3077-2015
	40Cr A20402
5	Q/BQB 517-2018
	40Cr
6	GB /T 3078-2019
	40Cr
7	Q/BQB 135-2009
	40Cr
8	JB /T 6396-2006
	40Cr
9	Q/ASB 234-2018
	40Cr
10	JB /T 6908-2020
	40Cr A20402
11	GB /T 37601-2019
	40Cr
12	GB /T 11251-2020
	40Cr A20402

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