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France AFNOR NF C40R 淬火和回火钢 - 第1部分:一般交货技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: C40R / C 40 R
Category Grade Standard Region/Area Standard Content
Metals C 40 R NF EN 10083-1 France 淬火和回火钢 - 第1部分:一般交货技术条件

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

Element Min Max Similar
Si - 0.4000 -
S 0.0200 0.0400 -
P - 0.0300 -
Ni - 0.4000 -
Mo - 0.1000 -
Mn 0.5000 0.8000 -
Cr+Mo+Ni - 0.6300 -
Cr - 0.4000 -
C 0.3700 0.4400 -

Mechanical Properties of steel grade C 40 R

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)
789 (≥) 184 (≥) 31 12 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade C 40 R

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
14 - -     0.14 -  
776 759 - 22.3 241   -  
683 - 42 23.2   233 414

Heat Treatment of steel grade C 40 R

Heat treated : 1714°C - 1857°C

Technological Curves of steel grade C 40 R

Cross Reference Table (Equivalent Grade) of C 40 R

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