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China GB U71Mn 铁路用热轧钢轨 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: U71Mn / U71Mn
Category Grade Standard Region/Area Standard Content
Metals U71Mn GB 2585 China 铁路用热轧钢轨

Chemical composition(mass fraction)(wt.%) of the U71Mn

Element Min Max Similar

Mechanical Properties of steel grade U71Mn

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)
741 (≥) 824 (≥) 31 42 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade U71Mn

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 - -     0.41 -  
358 185 - 43.3 442   -  
857 - 22 33.2   423 223

Heat Treatment of steel grade U71Mn

Heat treated : 1292°C - 1698°C

Technological Curves of steel grade U71Mn

Cross Reference Table (Equivalent Grade) of U71Mn

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