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Japan JIS SKH55 高速工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKH55 / SKH 55
Category Grade Standard Region/Area Standard Content
Metals SKH 55 JIS G4403 Japan 高速工具鋼鋼料

Chemical composition(mass fraction)(wt.%) of the SKH 55

Element Min Max Similar

Mechanical Properties of steel grade SKH 55

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)
444 (≥) 342 (≥) 32 31 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade SKH 55

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
23 - -     0.13 -  
956 422 - 33.3 112   -  
717 - 34 13.2   343 114

Heat Treatment of steel grade SKH 55

Heat treated : 1133°C - 1839°C

Technological Curves of steel grade SKH 55

Cross Reference Table (Equivalent Grade) of SKH 55

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