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Brazil NBR CFQ250 Thin coils and sheets of hot rolled carbon steel for structural use - Specification and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: CFQ250 / CFQ250
Category Grade Standard Region/Area Standard Content
Metals CFQ250 ABNT NBR 6650 Brazil Thin coils and sheets of hot rolled carbon steel for structural use - Specification

Chemical composition(mass fraction)(wt.%) of the CFQ250

Element Min Max Similar
C - 0.2000 -
Mn - 1.0000 -
P - 0.0350 -
S - 0.0300 -
Si - 0.4000 -
Al 0.0100 - -
CEV - 0.5500 -

Mechanical Properties of steel grade CFQ250

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)
466 (≥) 318 (≥) 42 42 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade CFQ250

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
31 - -     0.43 -  
982 831 - 32.3 212   -  
788 - 42 12.2   214 321

Heat Treatment of steel grade CFQ250

Heat treated : 1692°C - 1933°C

Technological Curves of steel grade CFQ250

Cross Reference Table (Equivalent Grade) of CFQ250

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