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Japan JIS SCM418 Chromium molybdenum steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCM418 / SCM 418
Category Grade Standard Region/Area Standard Content
Metals SCM 418 JIS G4105 Japan Chromium molybdenum steels

Chemical composition(mass fraction)(wt.%) of the SCM 418

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mo 0.1500 0.2500 -
Mn 0.6000 0.9000 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.1600 0.2100 -
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mo 0.1500 0.3000 -
Mn 0.6000 0.8500 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.1600 0.2100 -

Mechanical Properties of steel grade SCM 418

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)
772 (≥) 485 (≥) 11 31 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade SCM 418

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
31 - -     0.12 -  
636 795 - 12.3 342   -  
294 - 21 42.2   341 244

Heat Treatment of steel grade SCM 418

Heat treated : 1944°C - 1325°C

Technological Curves of steel grade SCM 418

Cross Reference Table (Equivalent Grade) of SCM 418

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