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China GB Q420qC 桥梁用结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q420qC / Q420q C
Category Grade Standard Region/Area Standard Content
Metals Q420q C GB/T 714 China 桥梁用结构钢

Chemical composition(mass fraction)(wt.%) of the Q420q C

Element Min Max Similar

Mechanical Properties of steel grade Q420q C

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)
897 (≥) 876 (≥) 24 13 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade Q420q C

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
44 - -     0.24 -  
929 638 - 12.3 133   -  
294 - 14 31.2   111 423

Heat Treatment of steel grade Q420q C

Heat treated : 1381°C - 1696°C

Technological Curves of steel grade Q420q C

Cross Reference Table (Equivalent Grade) of Q420q C

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