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STF8

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STF8 STS5
#STF8

Description

Korea KS STF8 Carbide for cutting tools and STF8 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: 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

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 of steel 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)
367 (≥) 223 (≥) 24 33 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade STF8

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
24 - -     0.22 -  
686 768 - 23.3 214   -  
344 - 32 24.2   414 412

Heat Treatment of steel grade STF8

Heat treated : 1153°C - 1751°C

Technological Curves of steel grade STF8

Cross Reference Table (Equivalent Grade) of STF8

Grade Standard Country Application
STF8 KS Korea Carbide for cutting tools
STF8 KS Korea Carbide for cutting tools
STF8 STS5
Available Suppliers
Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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