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A25 Class U

America ASTM A25ClassU 电气化铁路服务锻钢轮 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A25ClassU / A25 Class U
Category Grade Standard Region/Area Standard Content
Metals A25 Class U ASTM A25 America 电气化铁路服务锻钢轮

Chemical composition(mass fraction)(wt.%) of the A25 Class U

Element Min Max Similar

Mechanical Properties of steel grade A25 Class U

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)
339 (≥) 974 (≥) 24 12 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade A25 Class U

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
13 - -     0.41 -  
681 656 - 33.3 243   -  
169 - 21 43.2   133 141

Heat Treatment of steel grade A25 Class U

Heat treated : 1998°C - 1379°C

Technological Curves of steel grade A25 Class U

Cross Reference Table (Equivalent Grade) of A25 Class U

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