Whether it is hot rolled C-beam or cold-formed C-beam is a kind of C-beam, but due to the different uses of steel, the rolling of steel is mainly divided into hot rolling and cold rolling. At present, hot rolled C-beam is widely used, and the second cold rolling is only used to produce small section steel and thin plate. Is there anything else you don't need?
First of all, the reason of producing residual stress is different between hot-rolled C-beam and cold-rolled C-beam, so the distribution of residual stress on section is also very different. The distribution of residual stress on cold-formed thin-walled steel section is bending type, while that on hot-rolled or welded steel section is film type.
Secondly, the torsion resistance of hot-rolled C-beam is different from that of cold-formed C-beam. The free torsion stiffness of hot-rolled section steel is higher than that of cold-rolled section steel, so the torsion resistance of hot-rolled section steel is better than that of cold-rolled section steel.
Then, the cross section of hot-rolled C-beam is different from that of cold-formed C-beam. Local buckling is allowed in the section of cold-rolled formed steel, which can make full use of the bearing capacity after buckling; Local buckling is not allowed in hot rolled section.
The above is all about the "difference between hot rolled C-beam and cold-formed C-beam". We also know so much, finding out the C-beam manufacturer is the key.