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Japan JIS SK70 碳工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SK70 / SK 70
Category Grade Standard Region/Area Standard Content
Metals SK 70 JIS G4401 Japan 碳工具鋼鋼料

Chemical composition(mass fraction)(wt.%) of the SK 70

Element Min Max Similar

Mechanical Properties of steel grade SK 70

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)
935 (≥) 373 (≥) 13 14 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade SK 70

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 - -     0.31 -  
391 388 - 11.3 244   -  
789 - 11 42.2   421 241

Heat Treatment of steel grade SK 70

Heat treated : 1286°C - 1377°C

Technological Curves of steel grade SK 70

Cross Reference Table (Equivalent Grade) of SK 70

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