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40 SiNiCr 250

Romania STAS 40SiNiCr250 Heat resisting steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 40SiNiCr250 / 40 SiNiCr 250
Category Grade Standard Region/Area Standard Content
Metals 40 SiNiCr 250 STAS 11523 Romania Heat resisting steels

Chemical composition(mass fraction)(wt.%) of the 40 SiNiCr 250

Element Min Max Similar

Mechanical Properties of steel grade 40 SiNiCr 250

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)
174 (≥) 973 (≥) 21 44 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade 40 SiNiCr 250

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
32 - -     0.42 -  
423 127 - 14.3 313   -  
368 - 43 32.2   313 313

Heat Treatment of steel grade 40 SiNiCr 250

Heat treated : 1357°C - 1629°C

Technological Curves of steel grade 40 SiNiCr 250

Cross Reference Table (Equivalent Grade) of 40 SiNiCr 250

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