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China YB U77MnCr 起重机用钢轨 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: U77MnCr / U77MnCr
Category Grade Standard Region/Area Standard Content
Metals U77MnCr YB/T 5055 China 起重机用钢轨

Chemical composition(mass fraction)(wt.%) of the U77MnCr

Element Min Max Similar
S - 0.0250 -
P - 0.0350 -
Cr 0.2500 0.4000 -
Mn 0.8000 1.1000 -
Si 0.1000 0.5000 -
C 0.7200 0.8200 -

Mechanical Properties of steel grade U77MnCr

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)
826 (≥) 634 (≥) 33 23 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade U77MnCr

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
21 - -     0.24 -  
223 627 - 11.3 241   -  
999 - 23 23.2   421 122

Heat Treatment of steel grade U77MnCr

Heat treated : 1659°C - 1732°C

Technological Curves of steel grade U77MnCr

Cross Reference Table (Equivalent Grade) of U77MnCr

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