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China GJB 40Cr 火炮零件用无缝钢管规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 40Cr / 40Cr
Category Grade Standard Region/Area Standard Content
Metals 40Cr GJB 6483 China 火炮零件用无缝钢管规范

Chemical composition(mass fraction)(wt.%) of the 40Cr

Element Min Max Similar
C 0.3700 0.4400 -
Si 0.1700 0.3700 -
Mn 0.5000 0.8000 -
P - 0.0250 -
S - 0.0200 -
Cr 0.8000 1.1000 -
Ni - 0.3000 -
Mo - 0.1500 -
Cu - 0.2500 -

Mechanical Properties of steel grade 40Cr

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
569 (≥) 194 (≥) 14 14 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 40Cr

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
22 - -     0.42 -  
287 191 - 43.3 214   -  
762 - 33 33.2   411 433

Heat Treatment of steel grade 40Cr

Heat treated : 1497°C - 1262°C

Technological Curves of steel grade 40Cr

Cross Reference Table (Equivalent Grade) of 40Cr

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