The difference between Hot Rolled Steel Pipe and Cold Drawn Steel Pipes 1:
In the production of cold rolled pipe, its cross-section can have a certain degree of bending, bending is conducive to the bearing capacity of cold rolled pipe. In the production of hot-rolled tube, its cross-section is not allowed to have a localized bending phenomenon, which will affect its service life.
Hot rolled tube and cold drawn tube difference 2:
As the cold rolled tube and hot rolled tube production process is different, so it leads to their dimensional accuracy precision surface finish is not the same. Generally speaking, the cold rolled tube is higher than the precision of the hot rolled tube, the surface finish is also much better.
Difference between hot rolled pipe and cold drawn pipe 3:
The production process of cold rolled pipe and hot rolled pipe is different. Cold rolled pipe in the production of molding, need to bear grudge process, heating treatment, piercing technology, hot rolling process, beating treatment, pickling works, phosphating treatment, cold drawing process, annealing treatment, straightening treatment, pipe cutting process, as well as inspection of the finished product, packing treatment.
While the hot rolled pipes need to carry out the pipe grudge process, heating treatment, piercing and forming, rolling treatment, sizing treatment, cold bed treatment, straightening treatment, switching treatment, as well as the final inspection and packing treatment. From these introductions can be seen in their process procedures have certain differences.
Hot rolled pipe and cold drawn pipe difference 4:
Cold rolled pipe and hot rolled pipe cross-section distribution is also somewhat different, this is because in the production of molding, the residual stress is generated by different reasons. This leads to the cold rolled tube cross-section of the residual stress has some bending, while the residual stress of the hot rolled tube is a thin film type.
Hot rolled pipe and cold drawn pipe difference 5:
Because the production process of hot rolled pipe and cold rolled pipe is different, so the hot rolled pipe sold on the market is divided into hot rolled seamless steel pipe as well as hot rolled welded steel pipe; while cold rolled pipe can be divided into cold rolled seamless steel pipe and cold rolled welded steel pipe, cold rolled seamless steel pipe can be divided into round and shaped tube of these two kinds of pipe. In fact, hot rolled pipe and cold rolled pipe in the molding, the difference is not very big, at the same time their mechanical properties are similar.
They can also be distinguished according to the following:
Production process: hot rolled pipe is rolled billet molding at high temperature, while cold drawn pipe is drawn and molded by mechanical equipment at room temperature.
Dimensional accuracy and surface finish: Cold-drawn tubes usually have higher dimensional accuracy and better surface finish because the cold-drawing process provides finer control and higher machining accuracy.
Mechanical Properties: The tensile strength of cold-drawn tubes is usually greater than that of hot-rolled tubes, but the elongation is less. This is due to the plastic deformation that occurs during the cold-drawing process, which results in the strengthening of the material.
Applicable fields: Because cold-drawn tubes have higher dimensional accuracy and surface finish, they are commonly used in fields with high requirements for dimensional accuracy, surface quality and mechanical properties, such as precision machinery, automotive parts and industrial equipment. Hot rolled tubes, on the other hand, are commonly used for structural purposes under general requirements due to their lower cost and adequate mechanical properties.
Post time: Jul-10-2025
