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Description

Japan JIS SKH51 W-phase system high-speed tool steel and SKH51 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: SKH51
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy SKH51 JIS Japan W-phase system high-speed tool steel
SKD8
SKT3
SKT4
SKT6
SKH2
SKH3
SKH4
SKH10
SKH40
SKH50

Chemical composition(mass fraction)(wt.%) of the SKH51

C(%) Si(%) Mn(%) Cr(%) Mo(%) V(%) W(%)
0.80-0.88 Max 0.45 Max 0.40 3.80-4.50 4.70-5.20 1.70-2.10 5.90-6.70

Mechanical Properties of steel grade SKH51

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)
354 (≥) 468 (≥) 43 31 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade SKH51

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
42 - -     0.13 -  
876 769 - 14.3 341   -  
577 - 14 24.2   442 413

Heat Treatment of steel grade SKH51

Heat treated : 1962°C - 1728°C

Technological Curves of steel grade SKH51

Cross Reference Table (Equivalent Grade) of SKH51

Grade Standard Country Application
SKH51 JIS Japan W-phase system high-speed tool steel

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