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Canada CSA 700QT General requirements for rolled or welded structural quality steel / Structural quality steel and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 700QT / 700QT
Category Grade Standard Region/Area Standard Content
Metals 700QT G40.20/G40.21 Canada General requirements for rolled or welded structural quality steel / Structural quality steel

Chemical composition(mass fraction)(wt.%) of the 700QT

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0300 -
Mn - 1.5000 -
C - 0.2000 -
B 0.0005 0.0050 -

Mechanical Properties of steel grade 700QT

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)
281 (≥) 142 (≥) 42 14 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 113

Physical Properties of steel grade 700QT

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
23 - -     0.44 -  
615 114 - 24.3 342   -  
551 - 44 31.2   134 112

Heat Treatment of steel grade 700QT

Heat treated : 1675°C - 1295°C

Technological Curves of steel grade 700QT

Cross Reference Table (Equivalent Grade) of 700QT

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