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Description

Japan JIS SKH40 Powder metallurgy high-speed tool steel and SKH40 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: SKH40
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy SKH40 JIS Japan Powder metallurgy high-speed tool steel
SKD62
SKD7
SKD8
SKT3
SKT4
SKT6
SKH2
SKH3
SKH4
SKH10

Chemical composition(mass fraction)(wt.%) of the SKH40

C(%) Si(%) Mn(%) Cr(%) Mo(%) V(%) W(%) Co(%)
1.23-1.33 Max 0.45 Max 0.40 3.80-4.50 4.70-5.30 2.70-3.20 5.70-6.70 8.00-8.80

Mechanical Properties of steel grade SKH40

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)
791 (≥) 542 (≥) 23 31 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade SKH40

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
41 - -     0.32 -  
941 265 - 42.3 334   -  
684 - 21 34.2   131 321

Heat Treatment of steel grade SKH40

Heat treated : 1397°C - 1147°C

Technological Curves of steel grade SKH40

Cross Reference Table (Equivalent Grade) of SKH40

Grade Standard Country Application
SKH40 JIS Japan Powder metallurgy high-speed tool steel

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