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China YB U78CrV 起重机用钢轨 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: U78CrV / U78CrV
Category Grade Standard Region/Area Standard Content
Metals U78CrV YB/T 5055 China 起重机用钢轨

Chemical composition(mass fraction)(wt.%) of the U78CrV

Element Min Max Similar
S - 0.0300 -
P - 0.0350 -
V 0.0400 0.1200 -
Cr 0.3000 0.5000 -
Mn 0.7000 1.0500 -
Si 0.5000 0.8000 -
C 0.7200 0.8200 -

Mechanical Properties of steel grade U78CrV

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)
645 (≥) 715 (≥) 33 41 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade U78CrV

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 - -     0.12 -  
328 221 - 11.3 441   -  
498 - 41 23.2   331 221

Heat Treatment of steel grade U78CrV

Heat treated : 1821°C - 1513°C

Technological Curves of steel grade U78CrV

Cross Reference Table (Equivalent Grade) of U78CrV

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