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

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

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

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mn 0.9000 1.2000 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.5200 0.6000 -
B - - 0.0030

Mechanical Properties of steel grade 50 ChGR

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)
445 (≥) 937 (≥) 33 24 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade 50 ChGR

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
11 - -     0.34 -  
973 164 - 13.3 333   -  
464 - 41 24.2   211 323

Heat Treatment of steel grade 50 ChGR

Heat treated : 1888°C - 1659°C

Technological Curves of steel grade 50 ChGR

Cross Reference Table (Equivalent Grade) of 50 ChGR

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