STF8

This page provides STF8 datasheet, STF8 mechanical properties, chemical element STF8, technical specifications of STF8 steel material properties. STF8 performance specifications.

KS STF8
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy STF8 KS Korea Carbide for cutting tools
STD61
STD62
STD62
STF3
STF3
STF4
STF4
STF7
STF7
STF8
Datasheet for:Steel Grades:Tool Steel And Hard Alloy:STF8

Chemical composition(mass fraction)(wt.%) of the STF8

C(%) Si(%) Mn(%) Cr(%) Mo(%) V(%) W(%) Co(%)
0.35-0.45 ≤0.50 ≤0.60 4.00-4.70 0.30-0.50 3.80-4.50 3.80-4.50 3.80-4.50

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of grade STF8

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)
683 (≥) 833 (≥) 33 43 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 211
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
44 - -     0.44 -  
759 564 - 43.3 234   -  
944 - 31 32.2   212 411
Heat treated : 1979°C - 1519°C
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
STF8 KS Korea
Carbide for cutting tools
STF8 KS Korea
Carbide for cutting tools
STF8

Haihong International Trade (HK) CO., Limited

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STF8 can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe, steel billet, steel ingot, steel wire rods. electroslag, forged ring/ block,etc.
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