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China GB 55Q 热轧轻轨 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55Q / 55Q
Category Grade Standard Region/Area Standard Content
Metals 55Q GB/T 11264 China 热轧轻轨

Chemical composition(mass fraction)(wt.%) of the 55Q

Element Min Max Similar

Mechanical Properties of steel grade 55Q

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)
441 (≥) 247 (≥) 44 44 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade 55Q

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 - -     0.44 -  
667 431 - 42.3 313   -  
298 - 24 21.2   143 132

Heat Treatment of steel grade 55Q

Heat treated : 1191°C - 1262°C

Technological Curves of steel grade 55Q

Cross Reference Table (Equivalent Grade) of 55Q

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