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

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

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

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 1.0000 1.4000 -
Mo - 0.1500 -
Mn 0.5000 0.8000 -
Cu - 0.3000 -
Cr 0.4500 0.7500 -
C 0.3600 0.4400 -

Mechanical Properties of steel grade 40 ChN

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)
659 (≥) 129 (≥) 11 23 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical Properties of steel grade 40 ChN

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
41 - -     0.24 -  
441 182 - 32.3 423   -  
474 - 43 21.2   211 211

Heat Treatment of steel grade 40 ChN

Heat treated : 1411°C - 1592°C

Technological Curves of steel grade 40 ChN

Cross Reference Table (Equivalent Grade) of 40 ChN

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