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France AFNOR NF AF50S Railway transport equipment. Recommended steels for railway rolling-stock construction. V : unalloyed forging steels suitable for heat treatment and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: AF50S / AF 50 S
Category Grade Standard Region/Area Standard Content
Metals AF 50 S NF F 80-105 France Railway transport equipment. Recommended steels for railway rolling-stock construction. V : unalloyed forging steels suitable for heat treatment

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

Element Min Max Similar

Mechanical Properties of steel grade AF 50 S

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)
783 (≥) 737 (≥) 42 11 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade AF 50 S

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
14 - -     0.21 -  
843 376 - 41.3 233   -  
368 - 22 42.2   434 432

Heat Treatment of steel grade AF 50 S

Heat treated : 1832°C - 1713°C

Technological Curves of steel grade AF 50 S

Cross Reference Table (Equivalent Grade) of AF 50 S

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