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China GB Q345qD 桥梁用结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q345qD / Q345q D
Category Grade Standard Region/Area Standard Content
Metals Q345q D GB/T 714 China 桥梁用结构钢

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

Element Min Max Similar
Pcm - 0.2000 -
CEV - 0.4000 -
CEV - 0.3800 -
CEV - - -
CEV - 0.4300 -
CEV - 0.4500 -
Nb+V+Ti - 0.2200 -
N - 0.0080 -
Cu - 0.3000 -
Ni - 0.3000 -
Cr - 0.3000 -
Al 0.0100 0.0450 -
Ti 0.0060 0.0300 -
V 0.0100 0.0800 -
Nb 0.0100 0.0900 -
Mn 0.9000 1.6000 -
Si - 0.5500 -
C - 0.1400 -
H - 0.0002 -
B - 0.0005 -
S - 0.0200 -
P - 0.0250 -
Nb+V+Ti - 0.2200 -
N - 0.0080 -
Cu - 0.3000 -
Ni - 0.3000 -
Cr - 0.3000 -
Al 0.0100 0.0450 -
Ti 0.0060 0.0300 -
V 0.0100 0.0800 -
Nb 0.0050 0.0600 -
Mn 0.9000 1.6000 -
Si - 0.5500 -
C - 0.1800 -

Mechanical Properties of steel grade Q345q 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)
867 (≥) 189 (≥) 32 21 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade Q345q 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
21 - -     0.24 -  
398 998 - 42.3 431   -  
626 - 14 44.2   334 424

Heat Treatment of steel grade Q345q D

Heat treated : 1636°C - 1858°C

Technological Curves of steel grade Q345q D

Cross Reference Table (Equivalent Grade) of Q345q D

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