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Japan JIS SNCM240 镍铬钼钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SNCM240 / SNCM 240
Category Grade Standard Region/Area Standard Content
Metals SNCM 240 JIS G4103 Japan 镍铬钼钢

Chemical composition(mass fraction)(wt.%) of the SNCM 240

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni 0.4000 0.7000 -
Mo 0.1500 0.3000 -
Mn 0.7000 1.0000 -
Cu - 0.3000 -
Cr 0.4000 0.6000 -
C 0.3800 0.4300 -
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni 0.4000 0.7000 -
Mo 0.1500 0.3000 -
Mn 0.7000 1.0000 -
Cr 0.4000 0.6500 -
C 0.3800 0.4300 -

Mechanical Properties of steel grade SNCM 240

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)
646 (≥) 646 (≥) 44 13 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade SNCM 240

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
32 - -     0.23 -  
956 369 - 14.3 322   -  
159 - 31 14.2   211 414

Heat Treatment of steel grade SNCM 240

Heat treated : 1577°C - 1584°C

Technological Curves of steel grade SNCM 240

Cross Reference Table (Equivalent Grade) of SNCM 240

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