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Bulgaria BDS 50ChGA Spring steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 50ChGA / 50 ChGA
Category Grade Standard Region/Area Standard Content
Metals 50 ChGA BDS 6742 Bulgaria Spring steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 50 ChGA

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0250 -
P - 0.0250 -
Ni - 0.3000 -
Mn 0.8000 1.0000 -
Cu - 0.3000 -
Cr 0.9500 1.2000 -
C 0.4700 0.5200 -
B - - 0.0010

Mechanical Properties of steel grade 50 ChGA

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)
179 (≥) 277 (≥) 31 31 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade 50 ChGA

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
44 - -     0.12 -  
846 784 - 24.3 413   -  
167 - 42 22.2   443 412

Heat Treatment of steel grade 50 ChGA

Heat treated : 1972°C - 1547°C

Technological Curves of steel grade 50 ChGA

Cross Reference Table (Equivalent Grade) of 50 ChGA

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