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Japan JIS SKS21 合金工具钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SKS21 / SKS 21
Category Grade Standard Region/Area Standard Content
Metals SKS 21 JIS G4404 Japan 合金工具钢

Chemical composition(mass fraction)(wt.%) of the SKS 21

Element Min Max Similar

Mechanical Properties of steel grade SKS 21

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)
199 (≥) 438 (≥) 32 11 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade SKS 21

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
11 - -     0.22 -  
816 356 - 43.3 113   -  
334 - 43 22.2   414 233

Heat Treatment of steel grade SKS 21

Heat treated : 1223°C - 1537°C

Technological Curves of steel grade SKS 21

Cross Reference Table (Equivalent Grade) of SKS 21

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