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China JB Q345D 风力发电塔架 法兰锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q345D / Q345D
Category Grade Standard Region/Area Standard Content
Metals Q345D JB/T 11218 China 风力发电塔架 法兰锻件

Chemical composition(mass fraction)(wt.%) of the Q345D

Element Min Max Similar
Al - 0.0150 -
Cu - 0.3000 -
Ti - 0.2000 -
Ni - 0.7000 -
Nb - 0.0600 -
V - 0.1500 -
Mo - 0.0100 -
Cr - 0.3000 -
S - 0.0200 -
P - 0.0250 -
Si - 0.5500 -
Mn 1.0000 1.6000 -
C - 0.1800 -

Mechanical Properties of steel grade Q345D

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)
999 (≥) 184 (≥) 11 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade Q345D

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
34 - -     0.31 -  
956 292 - 32.3 323   -  
873 - 44 14.2   434 131

Heat Treatment of steel grade Q345D

Heat treated : 1112°C - 1145°C

Technological Curves of steel grade Q345D

Cross Reference Table (Equivalent Grade) of Q345D

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