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China GB Q420qE 桥梁用结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q420qE / Q420q E
Category Grade Standard Region/Area Standard Content
Metals Q420q E GB/T 714 China 桥梁用结构钢

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

Element Min Max Similar

Mechanical Properties of steel grade Q420q E

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)
722 (≥) 477 (≥) 44 34 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade Q420q E

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
33 - -     0.43 -  
249 171 - 34.3 124   -  
857 - 34 13.2   412 342

Heat Treatment of steel grade Q420q E

Heat treated : 1523°C - 1982°C

Technological Curves of steel grade Q420q E

Cross Reference Table (Equivalent Grade) of Q420q E

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