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Japan JASO SCM420H Steel for automotive structural uses and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCM420H / SCM420H
Category Grade Standard Region/Area Standard Content
Metals SCM420H JASO M106 Japan Steel for automotive structural uses

Chemical composition(mass fraction)(wt.%) of the SCM420H

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mo 0.1500 0.3500 -
Mn 0.5500 0.9000 -
Cu - 0.3000 -
Cr 0.8500 1.2500 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade SCM420H

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)
239 (≥) 843 (≥) 12 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade SCM420H

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
21 - -     0.11 -  
952 153 - 13.3 122   -  
635 - 14 13.2   333 234

Heat Treatment of steel grade SCM420H

Heat treated : 1638°C - 1882°C

Technological Curves of steel grade SCM420H

Cross Reference Table (Equivalent Grade) of SCM420H

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