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Japan JIS SCM4H 指定的淬透性结构钢带 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCM4H / SCM 4 H
Category Grade Standard Region/Area Standard Content
Metals SCM 4 H JIS G4052 Japan 指定的淬透性结构钢带

Chemical composition(mass fraction)(wt.%) of the SCM 4 H

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 0.3700 0.4400 -

Mechanical Properties of steel grade SCM 4 H

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)
665 (≥) 555 (≥) 41 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical Properties of steel grade SCM 4 H

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 - -     0.14 -  
321 433 - 33.3 313   -  
722 - 21 12.2   412 334

Heat Treatment of steel grade SCM 4 H

Heat treated : 1875°C - 1137°C

Technological Curves of steel grade SCM 4 H

Cross Reference Table (Equivalent Grade) of SCM 4 H

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