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China GB Q345qC 桥梁用结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q345qC / Q345q C
Category Grade Standard Region/Area Standard Content
Metals Q345q C GB/T 714 China 桥梁用结构钢

Chemical composition(mass fraction)(wt.%) of the Q345q C

Element Min Max Similar
C - 0.2000 -
Si - 0.6000 -
Mn 1.0000 1.6000 -
S - 0.0350 -
P - 0.0350 -
V - 0.0800 -
Ti - 0.0300 -
Si - 0.5500 -
S - 0.0250 -
P - 0.0300 -
Ni - 0.5000 -
Nb - 0.0600 -
N - 0.0120 -
Mo - 0.2000 -
Mn 0.9000 1.7000 -
Cu - 0.5500 -
Cr - 0.8000 -
C - 0.2000 -
Al 0.0150 - -

Mechanical Properties of steel grade Q345q 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)
543 (≥) 896 (≥) 11 43 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade Q345q 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
12 - -     0.21 -  
768 549 - 41.3 433   -  
827 - 32 41.2   211 412

Heat Treatment of steel grade Q345q C

Heat treated : 1493°C - 1266°C

Technological Curves of steel grade Q345q C

Cross Reference Table (Equivalent Grade) of Q345q C

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