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Japan JIS SKH40 高速工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKH40 / SKH 40
Category Grade Standard Region/Area Standard Content
Metals SKH 40 JIS G4403 Japan 高速工具鋼鋼料

Chemical composition(mass fraction)(wt.%) of the SKH 40

Element Min Max Similar
W 5.7000 6.7000 -
V 2.7000 3.2000 -
Si - 0.4500 -
S - 0.0300 -
P - 0.0300 -
Mo 4.7000 5.3000 -
Mn - 0.4000 -
Cu - 0.2500 -
Cr 3.8000 4.5000 -
Co 8.0000 8.8000 -
C 1.2300 1.3300 -

Mechanical Properties of steel grade SKH 40

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)
388 (≥) 287 (≥) 41 44 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade SKH 40

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
42 - -     0.43 -  
975 698 - 11.3 234   -  
273 - 22 31.2   413 324

Heat Treatment of steel grade SKH 40

Heat treated : 1433°C - 1936°C

Technological Curves of steel grade SKH 40

Cross Reference Table (Equivalent Grade) of SKH 40

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