The difference between hot-rolled tubes and cold-drawn tubes: When making cold-rolled tubes, its cross section can be bent to a certain extent, and bending is beneficial to the bearing capacity of cold-rolled tubes. However, when making hot-rolled tubes, its cross section cannot have local bending, which will affect its service life.
The difference between hot-rolled tubes and cold-drawn tubes: Due to the difference in the production process of cold-rolled tubes and hot-rolled tubes, their dimensional accuracy and surface finish are also different. Generally speaking, cold-rolled tubes are more accurate than hot-rolled tubes, and the surface finish is much better.
The difference between hot-rolled tubes and cold-drawn tubes: During the cold rolling process, the cooled hot-rolled steel passes through another series of rollers at room temperature. Since the material is no longer hot and ductile, significantly higher pressure is required to compress it into the desired shape. The hot rolling process starts with a large rectangular metal plate called a billet. First, the billet is heated and compressed into a large coil. While still hot, it passes through a series of rotating rollers to reach the desired size. In sheet metal production operations, the rolled steel is rolled into coils and cooled.
The fourth difference between hot-rolled tubes and cold-drawn tubes: The cross-sectional distribution of cold-rolled tubes and hot-rolled tubes is also somewhat different. This is because the causes of residual stress during molding are different. This leads to some bending of the residual stress in the cross section of the cold-rolled tube, while the residual stress of the hot-rolled tube is of the film type.
In fact, there is not much difference between hot-rolled tubes and cold-rolled tubes after molding, and their mechanical properties are also similar.
Carbon Hot Rolled Steel pipe
