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Japan JIS SKD4 合金工具钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKD4 / SKD 4
Category Grade Standard Region/Area Standard Content
Metals SKD 4 JIS G4404 Japan 合金工具钢

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

Element Min Max Similar

Mechanical Properties of steel grade SKD 4

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)
752 (≥) 552 (≥) 41 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical Properties of steel grade SKD 4

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
43 - -     0.14 -  
668 114 - 34.3 324   -  
919 - 12 44.2   443 232

Heat Treatment of steel grade SKD 4

Heat treated : 1659°C - 1585°C

Technological Curves of steel grade SKD 4

Cross Reference Table (Equivalent Grade) of SKD 4

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