Grade 40Cr
China ISC A20402
Corresponding Standard GB /T 3077-2015
Alloy structure steels
Classification Alloy Steel
Properties Low-Temperature Toughness Machinability Quench Hardness
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
σb
Mpa
Yield Point
σs
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
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS14 BS EN/BS
40Cr A20402 SCr440 SCr440
SCr440H
SCr440 5140 G51400 41Cr4 41Cr4 1.7035 42C4 41Cr4 1.7035 40Х 2245 530A40
530M40

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