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58 SiMo 8 KU

Italy UNI 58SiMo8KU Hot rolled or forged finished steel products for tools. Special alloyed steel qualities for cold working and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 58SiMo8KU / 58 SiMo 8 KU
Category Grade Standard Region/Area Standard Content
Metals 58 SiMo 8 KU UNI 2955-3 Italy Hot rolled or forged finished steel products for tools. Special alloyed steel qualities for cold working

Chemical composition(mass fraction)(wt.%) of the 58 SiMo 8 KU

Element Min Max Similar
Si 1.7000 2.1000 -
S - 0.0300 -
P - 0.0300 -
Mo 0.2500 0.4500 -
Mn 0.7000 0.9000 -
Cr - 0.3000 -
C 0.5000 0.6500 -

Mechanical Properties of steel grade 58 SiMo 8 KU

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)
195 (≥) 146 (≥) 43 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade 58 SiMo 8 KU

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
43 - -     0.13 -  
583 877 - 22.3 414   -  
499 - 22 13.2   322 311

Heat Treatment of steel grade 58 SiMo 8 KU

Heat treated : 1998°C - 1897°C

Technological Curves of steel grade 58 SiMo 8 KU

Cross Reference Table (Equivalent Grade) of 58 SiMo 8 KU

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