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Japan JIS A3 铁路机车车辆车轴 - 质量要求 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A3 / A3
Category Grade Standard Region/Area Standard Content
Metals A3 JIS E4502-1 Japan 铁路机车车辆车轴 - 质量要求

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

Element Min Max Similar
V - 0.1000 -
Si - 0.5000 -
S - 0.0400 -
P - 0.0400 -
Mo - 0.4000 -
Mn - 1.6000 -
Cu - 0.3000 -
Cr - 0.5000 -
C - 0.4000 -

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)
792 (≥) 421 (≥) 44 42 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

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
43 - -     0.41 -  
947 416 - 43.3 121   -  
231 - 41 34.2   242 343

Heat Treatment of steel grade A3

Heat treated : 1872°C - 1269°C

Technological Curves of steel grade A3

Cross Reference Table (Equivalent Grade) of A3

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