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Japan JIS SKH4 高速工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKH4 / SKH 4
Category Grade Standard Region/Area Standard Content
Metals SKH 4 JIS G4403 Japan 高速工具鋼鋼料

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

Element Min Max Similar
W 17.0000 19.0000 -
V 1.0000 1.5000 -
Si - 0.4500 -
S - 0.0300 -
P - 0.0300 -
Mn - 0.4000 -
Cu - 0.2500 -
Cr 3.8000 4.5000 -
Co 9.0000 11.0000 -
C 0.7300 0.8300 -

Mechanical Properties of steel grade SKH 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)
437 (≥) 536 (≥) 31 24 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade SKH 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
33 - -     0.13 -  
996 372 - 21.3 142   -  
395 - 23 34.2   341 114

Heat Treatment of steel grade SKH 4

Heat treated : 1563°C - 1923°C

Technological Curves of steel grade SKH 4

Cross Reference Table (Equivalent Grade) of SKH 4

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