What is the difference between Cold-rolled and hot-rolled ?

1. cold rolled steel cross-section to allow local buckling occurs , which can take advantage of the bearing capacity after buckling bars ; hot-rolled steel cross-section don't allowed the occurrence of local buckling ..
2. Hot-rolled steel and cold-rolled steel from residual stress for different reasons , so the distribution of the cross section is also a great difference . Residual Stress on cold-formed steel cross-sectional profile is curved , and hot rolled steel or steel welding residual stress distribution in the cross section is a thin film type .
3. Hot rolled steel  higher than cold rolled type just free torsional rigidity , so torsional performance is better than hot-rolled steel cold-rolled steel

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