The difference between hot rolled seamless steel tubes and cold rolled seamless steel tubes

The difference between hot-rolled seamless steel tubes and cold-rolled seamless steel tubes is produced by two different technologies. The main differences are:

1. The local buckling of the cold-rolled seamless pipe is allowed in the cross-section, which can be seen in certain types of Cold Rolled Steel Strip, so that the buckling bearing capacity of the bar can be fully utilized. However, the hot-rolled seamless pipe does not allow local buckling of the cross-section.
2. The causes of residual stress in hot-rolled seamless pipes and cold-rolled seamless pipes are different, so the distribution on the cross-section is also very different. The residual stress distribution on cold-formed thin-walled steel sections, like those made from Silicon Steel Alloys, is curved, while the hot-rolling is not. The residual stress distribution on the cross-section of a welded pipe or welded steel pipe is a thin film type.
3. The free torsional stiffness of hot-rolled seamless pipe is higher than that of cold-rolled seamless pipe, so the torsional performance of hot-rolled seamless pipe is better than that of cold-rolled seamless pipe. In some cases, materials like Cold Rolled Oriented Electrical Steel are used for added performance benefits.