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Japan JIS A2 铁路机车车辆车轴 - 质量要求 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A2 / A2
Category Grade Standard Region/Area Standard Content
Metals A2 JIS E4502-1 Japan 铁路机车车辆车轴 - 质量要求

Chemical composition(mass fraction)(wt.%) of the A2

Element Min Max Similar
V - 0.0500 -
Si - 0.5000 -
S - 0.0400 -
P - 0.0400 -
Mo - 0.0800 -
Mn - 1.2000 -
Cu - 0.3000 -
Cr - 0.3000 -
C - 0.5000 -

Mechanical Properties of steel grade A2

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)
616 (≥) 156 (≥) 42 33 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade A2

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
34 - -     0.24 -  
889 771 - 12.3 242   -  
976 - 12 41.2   333 311

Heat Treatment of steel grade A2

Heat treated : 1388°C - 1464°C

Technological Curves of steel grade A2

Cross Reference Table (Equivalent Grade) of A2

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