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STS21

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STS21 STS5
#STS21

Description

Korea KS STS21 Carbide for cutting tools and STS21 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: STS21
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy STS21 KS Korea Carbide for cutting tools
STC5
STC6
STC6
STC7
STC7
STS11
STS11
STS2
STS2
STS21

Chemical composition(mass fraction)(wt.%) of the STS21

C(％) Si(％) Mn(％) Cr(％) V(%) W(%)
1.00-1.10 ≤0.35 ≤0.50 0.20-0.50 0.10-0.25 0.50-1.00

Mechanical Properties of steel grade STS21

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)
491 (≥) 392 (≥) 33 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade STS21

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
33 - -     0.22 -  
221 854 - 21.3 333   -  
578 - 21 42.2   223 312

Heat Treatment of steel grade STS21

Heat treated : 1512°C - 1277°C

Technological Curves of steel grade STS21

Cross Reference Table (Equivalent Grade) of STS21

Grade Standard Country Application
STS21 KS Korea Carbide for cutting tools
STS21 KS Korea Carbide for cutting tools
STS21 STS5
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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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