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Japan JIS SCM421 Chromium molybdenum steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCM421 / SCM 421
Category Grade Standard Region/Area Standard Content
Metals SCM 421 JIS G4105 Japan Chromium molybdenum steels

Chemical composition(mass fraction)(wt.%) of the SCM 421

Element Min Max Similar

Mechanical Properties of steel grade SCM 421

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)
735 (≥) 782 (≥) 12 14 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade SCM 421

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 - -     0.31 -  
492 885 - 23.3 222   -  
927 - 31 11.2   342 433

Heat Treatment of steel grade SCM 421

Heat treated : 1753°C - 1222°C

Technological Curves of steel grade SCM 421

Cross Reference Table (Equivalent Grade) of SCM 421

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