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Korea KS STF8 合金工具钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STF8 / STF 8
Category Grade Standard Region/Area Standard Content
Metals STF 8 KS D 3753 Korea 合金工具钢

Chemical composition(mass fraction)(wt.%) of the STF 8

Element Min Max Similar

Mechanical Properties of steel grade STF 8

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)
125 (≥) 939 (≥) 41 23 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade STF 8

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
13 - -     0.11 -  
696 324 - 42.3 241   -  
733 - 11 23.2   142 314

Heat Treatment of steel grade STF 8

Heat treated : 1285°C - 1139°C

Technological Curves of steel grade STF 8

Cross Reference Table (Equivalent Grade) of STF 8

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