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China GB Q690FTD 风力发电塔用结构钢板 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q690FTD / Q690FTD
Category Grade Standard Region/Area Standard Content
Metals Q690FTD GB/T 28410 China 风力发电塔用结构钢板

Chemical composition(mass fraction)(wt.%) of the Q690FTD

Element Min Max Similar
V - 0.1500 -
Ti - 0.0500 -
Si - 0.6000 -
S - 0.0100 -
P - 0.0200 -
Ni - 0.8000 -
Nb - 0.0700 -
N - 0.0120 -
Mo - 0.5000 -
Mn - 1.8000 -
Cu - 0.8000 -
Cr - 0.8000 -
CEV - 0.5000 -
C - 0.2000 -
Al 0.0150 - -

Mechanical Properties of steel grade Q690FTD

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)
152 (≥) 398 (≥) 44 22 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade Q690FTD

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
44 - -     0.44 -  
523 848 - 42.3 444   -  
945 - 13 42.2   433 422

Heat Treatment of steel grade Q690FTD

Heat treated : 1464°C - 1327°C

Technological Curves of steel grade Q690FTD

Cross Reference Table (Equivalent Grade) of Q690FTD

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