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Bulgaria BDS 55 Constructional high grade carbon steel. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55 / 55
Category Grade Standard Region/Area Standard Content
Metals 55 BDS 5785 Bulgaria Constructional high grade carbon steel. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 55

Element Min Max Similar

Mechanical Properties of steel grade 55

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)
838 (≥) 314 (≥) 31 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade 55

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 - -     0.22 -  
538 912 - 24.3 244   -  
621 - 14 21.2   412 114

Heat Treatment of steel grade 55

Heat treated : 1619°C - 1352°C

Technological Curves of steel grade 55

Cross Reference Table (Equivalent Grade) of 55

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