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Russia GOST 51HFA Spring carbon and alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 51HFA / 51HFA
Category Grade Standard Region/Area Standard Content
Metals 51HFA GOST 14959 Russia Spring carbon and alloy steel bars. Specifications

Chemical composition(mass fraction)(wt.%) of the 51HFA

Element Min Max Similar
V 0.1500 0.2500 -
Si 0.1500 0.3000 -
S - 0.0350 -
P - 0.0350 -
Mn 0.3000 0.6000 -
Cr 0.7500 1.1000 -
C 0.4700 0.5500 -

Mechanical Properties of steel grade 51HFA

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)
746 (≥) 845 (≥) 23 44 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade 51HFA

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 - -     0.42 -  
655 283 - 12.3 111   -  
333 - 22 44.2   242 212

Heat Treatment of steel grade 51HFA

Heat treated : 1486°C - 1652°C

Technological Curves of steel grade 51HFA

Cross Reference Table (Equivalent Grade) of 51HFA

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