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China GB Q235qD 桥梁用结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q235qD / Q235q D
Category Grade Standard Region/Area Standard Content
Metals Q235q D GB/T 714 China 桥梁用结构钢

Chemical composition(mass fraction)(wt.%) of the Q235q D

Element Min Max Similar
C - 0.1800 -
Si - 0.3000 -
Mn 0.5000 0.8000 -
S - 0.0250 -
P - 0.0250 -
Si - 0.3500 -
S - 0.0250 -
P - 0.0250 -
Ni - 0.3000 -
N - 0.0120 -
Mn - 1.4000 -
Cu - 0.3000 -
Cr - 0.3000 -
C - 0.1700 -
Al 0.0150 - -

Mechanical Properties of steel grade Q235q D

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)
746 (≥) 767 (≥) 43 24 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade Q235q D

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
32 - -     0.14 -  
935 535 - 31.3 414   -  
594 - 34 34.2   313 441

Heat Treatment of steel grade Q235q D

Heat treated : 1398°C - 1928°C

Technological Curves of steel grade Q235q D

Cross Reference Table (Equivalent Grade) of Q235q D

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