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Poland PN St90PA Steel for railway -- Rails for normal width rail-track -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: St90PA / St 90 PA
Category Grade Standard Region/Area Standard Content
Metals St 90 PA PN H84027-07 Poland Steel for railway -- Rails for normal width rail-track -- Grades

Chemical composition(mass fraction)(wt.%) of the St 90 PA

Element Min Max Similar
C 0.6000 0.8000 -
Mn 0.8000 1.3000 -
P - 0.0400 -
S - 0.0400 -
Si 0.1000 0.5000 -
Si 0.1000 0.5000 -
S - 0.0400 -
P - 0.0400 -
Mn 0.8000 1.3000 -
C 0.6000 0.8000 -
Si 0.1000 0.5000 -
S - 0.0400 -
P - 0.0400 -
Mn 0.8000 1.3000 -
C 0.6000 0.8000 -

Mechanical Properties of steel grade St 90 PA

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)
669 (≥) 393 (≥) 42 33 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade St 90 PA

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
42 - -     0.32 -  
485 713 - 24.3 234   -  
119 - 12 34.2   434 242

Heat Treatment of steel grade St 90 PA

Heat treated : 1148°C - 1237°C

Technological Curves of steel grade St 90 PA

Cross Reference Table (Equivalent Grade) of St 90 PA

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