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Description

Japan JIS SKS81 Alloy tool steel - Tool steel and SKS81 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: SKS81
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy SKS81 JIS Japan Alloy tool steel - Tool steel
TC70
SK65
SK7
SK60
SKS11
SKS2
SKS21
SKS5
SKS51
SKS7

Chemical composition(mass fraction)(wt.%) of the SKS81

C(%) Si(%) Mn(%) P(%) S(%) Cr(%)
1.10-1.30 Max 0.35 Max 0.50 Max 0.030 Max 0.030 0.20-0.50

Mechanical Properties of steel grade SKS81

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 (≥) 429 (≥) 33 42 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade SKS81

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 - -     0.11 -  
774 112 - 44.3 331   -  
614 - 12 31.2   441 241

Heat Treatment of steel grade SKS81

Heat treated : 1471°C - 1788°C

Technological Curves of steel grade SKS81

Cross Reference Table (Equivalent Grade) of SKS81

Grade Standard Country Application
SKS81 JIS Japan Alloy tool steel - Tool steel
SKS81M JIS Japan Cold rolled special steel strip

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