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Russia GOST 55HGR Spring carbon and alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55HGR / 55HGR
Category Grade Standard Region/Area Standard Content
Metals 55HGR GOST 14959 Russia Spring carbon and alloy steel bars. Specifications

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

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Mn 0.9000 1.2000 -
Cr 0.9000 1.2000 -
C 0.5200 0.6000 -
B 0.0010 0.0030 -

Mechanical Properties of steel grade 55HGR

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)
245 (≥) 694 (≥) 31 24 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical Properties of steel grade 55HGR

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
22 - -     0.14 -  
261 131 - 12.3 234   -  
996 - 13 43.2   132 112

Heat Treatment of steel grade 55HGR

Heat treated : 1889°C - 1527°C

Technological Curves of steel grade 55HGR

Cross Reference Table (Equivalent Grade) of 55HGR

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