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Bulgaria BDS 40Ch Alloyed constructional steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 40Ch / 40 Ch
Category Grade Standard Region/Area Standard Content
Metals 40 Ch BDS 6354 Bulgaria Alloyed constructional steels. Designations and technical requirements

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

Element Min Max Similar
W - 0.2000 -
V - 0.0500 -
Ti - 0.0300 -
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mo - 0.1500 -
Mn 0.5000 0.8000 -
Cu - 0.3000 -
Cr 0.8000 1.1000 -
C 0.3600 0.4400 -

Mechanical Properties of steel grade 40 Ch

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)
841 (≥) 695 (≥) 44 13 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade 40 Ch

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
12 - -     0.34 -  
915 396 - 41.3 113   -  
429 - 41 43.2   234 213

Heat Treatment of steel grade 40 Ch

Heat treated : 1785°C - 1376°C

Technological Curves of steel grade 40 Ch

Cross Reference Table (Equivalent Grade) of 40 Ch

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