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55 S 2 GF

Bulgaria BDS 55S2GF Spring steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55S2GF / 55 S 2 GF
Category Grade Standard Region/Area Standard Content
Metals 55 S 2 GF BDS 6742 Bulgaria Spring steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 55 S 2 GF

Element Min Max Similar

Mechanical Properties of steel grade 55 S 2 GF

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)
639 (≥) 433 (≥) 33 41 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade 55 S 2 GF

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
42 - -     0.12 -  
277 418 - 42.3 114   -  
224 - 44 22.2   113 431

Heat Treatment of steel grade 55 S 2 GF

Heat treated : 1137°C - 1434°C

Technological Curves of steel grade 55 S 2 GF

Cross Reference Table (Equivalent Grade) of 55 S 2 GF

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