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China CNS SK7 碳工具鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SK7 / SK 7
Category Grade Standard Region/Area Standard Content
Metals SK 7 CNS G 3058 China 碳工具鋼鋼料

Chemical composition(mass fraction)(wt.%) of the SK 7

Element Min Max Similar
Si - 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn - 0.5000 -
Cu - 0.2500 -
Cr - 0.3000 -
C 0.6000 0.7000 -

Mechanical Properties of steel grade SK 7

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)
784 (≥) 595 (≥) 12 32 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade SK 7

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 - -     0.14 -  
145 179 - 23.3 321   -  
733 - 43 24.2   111 233

Heat Treatment of steel grade SK 7

Heat treated : 1572°C - 1393°C

Technological Curves of steel grade SK 7

Cross Reference Table (Equivalent Grade) of SK 7

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