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International ISO A3 Railway rolling stock material - Part 3: Axles for tractive and trailing stock - Quality requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A3 / A3
Category Grade Standard Region/Area Standard Content
Metals A3 ISO 1005-3 International Railway rolling stock material - Part 3: Axles for tractive and trailing stock - Quality requirements

Chemical composition(mass fraction)(wt.%) of the A3

Element Min Max Similar

Mechanical Properties of steel grade A3

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)
944 (≥) 352 (≥) 13 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade A3

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 - -     0.21 -  
363 192 - 23.3 244   -  
346 - 43 42.2   443 131

Heat Treatment of steel grade A3

Heat treated : 1832°C - 1369°C

Technological Curves of steel grade A3

Cross Reference Table (Equivalent Grade) of A3

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