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Japan JIS SK90 碳工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SK90 / SK 90
Category Grade Standard Region/Area Standard Content
Metals SK 90 JIS G4401 Japan 碳工具鋼鋼料

Chemical composition(mass fraction)(wt.%) of the SK 90

Element Min Max Similar
Si 0.1000 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn 0.1000 0.5000 -
Cu - 0.2500 -
Cr - 0.3000 -
C 0.8500 0.9500 -

Mechanical Properties of steel grade SK 90

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)
562 (≥) 538 (≥) 31 33 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical Properties of steel grade SK 90

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
14 - -     0.11 -  
397 449 - 43.3 222   -  
331 - 43 23.2   243 233

Heat Treatment of steel grade SK 90

Heat treated : 1928°C - 1347°C

Technological Curves of steel grade SK 90

Cross Reference Table (Equivalent Grade) of SK 90

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