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Poland PN P55A Steel for railway -- Tires for wheels sets of rail vehicles -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: P55A / P 55 A
Category Grade Standard Region/Area Standard Content
Metals P 55 A PN H84027-06 Poland Steel for railway -- Tires for wheels sets of rail vehicles -- Grades

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

Element Min Max Similar
C 0.5200 0.6000 -
Mn 0.6000 0.9000 -
P - 0.0400 -
S - 0.0400 -
Si 0.1500 0.4000 -
Ni - 0.3000 -
Cr - 0.3000 -
Mo - 0.0500 -
Cu - 0.3000 -
V - 0.0500 -
Al 0.0200 - -
Cr+Mo+Ni - 0.6000 -
Cr+Mo+Ni - 0.6000 -
Al 0.0200 - -
V - 0.0500 -
Si 0.1500 0.4000 -
S - 0.0400 -
P - 0.0400 -
Ni - 0.3000 -
Mo - 0.0500 -
Mn 0.6000 0.9000 -
Cu - 0.3000 -
Cr - 0.3000 -
C 0.5200 0.6000 -

Mechanical Properties of steel grade P 55 A

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)
917 (≥) 849 (≥) 32 43 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade P 55 A

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
33 - -     0.21 -  
247 748 - 42.3 443   -  
755 - 42 11.2   223 314

Heat Treatment of steel grade P 55 A

Heat treated : 1494°C - 1359°C

Technological Curves of steel grade P 55 A

Cross Reference Table (Equivalent Grade) of P 55 A

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