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Description

Japan JIS SKD8 Hot-work die steel and SKD8 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: SKD8
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy SKD8 JIS Japan Hot-work die steel
SKD2
SKD10
SKD11
SKD12
SKD4
SKD5
SKD6
SKD61
SKD62
SKD7

Chemical composition(mass fraction)(wt.%) of the SKD8

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Mo(%) V(%) W(%) Co(%)
0.35-0.45 0.15-0.50 0.20-0.50 Max 0.030 Max 0.020 4.00-4.70 0.30-0.50 1.70-2.10 3.80-4.50 4.00-4.50

Mechanical Properties of steel grade SKD8

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)
261 (≥) 251 (≥) 11 24 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade SKD8

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
44 - -     0.14 -  
431 856 - 13.3 343   -  
727 - 33 42.2   333 223

Heat Treatment of steel grade SKD8

Heat treated : 1672°C - 1487°C

Technological Curves of steel grade SKD8

Cross Reference Table (Equivalent Grade) of SKD8

Grade Standard Country Application
SKD8 JIS Japan Hot-work die steel

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