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Russia GOST 50HFA Spring carbon and alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 50HFA / 50HFA
Category Grade Standard Region/Area Standard Content
Metals 50HFA GOST 14959 Russia Spring carbon and alloy steel bars. Specifications

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

Element Min Max Similar
V 0.1000 0.2000 -
Si 0.1700 0.3700 -
S - 0.0250 -
P - 0.0250 -
Mn 0.5000 0.8000 -
Cr 0.8000 1.1000 -
C 0.4600 0.5400 -

Mechanical Properties of steel grade 50HFA

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)
666 (≥) 997 (≥) 44 12 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade 50HFA

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 -  
422 615 - 14.3 314   -  
723 - 31 22.2   431 232

Heat Treatment of steel grade 50HFA

Heat treated : 1356°C - 1164°C

Technological Curves of steel grade 50HFA

Cross Reference Table (Equivalent Grade) of 50HFA

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