40Cr A20402 - GB /T 3077-2015

Grade	40Cr
China ISC	A20402
Corresponding Standard	GB /T 3077-2015 Alloy Structure Steels
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

40Cr 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=25	Quenching + Tempering	≥980	≥785	≥9	≥45	≤207	≥47

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"!