STS7

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STS7

Korea KS STS7 Carbide for cutting tools and STS7 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Category Type Steel Grade Standard Country Application
Steel Grades Tool Steel And Hard Alloy STS7 KS Korea Carbide for cutting tools
STS11
STS2
STS2
STS21
STS21
STS5
STS5
STS51
STS51
STS7


Chemical composition(mass fraction)(wt.%) of the STS7

C(％) Si(％) Mn(％) Cr(％) V(%) W(%)
1.10-1.20 ≤0.35 ≤0.50 0.20-0.50 ＜0.20 2.00-2.50



Mechanical Properties of steel grade STS7

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)
277 (≥) 848 (≥) 13 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade STS7

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 – –     0.12 –  
993 791 – 12.3 331   –  
156 – 24 33.2   412 443

Heat Treatment of steel grade STS7

Heat treated : 1859°C – 1273°C

Technological Curves of steel grade STS7

Cross Reference Table (Equivalent Grade) of STS7

Grade Standard Country Application
STS7 KS Korea Carbide for cutting tools
STS7 KS Korea Carbide for cutting tools