The difference between hot-rolled seamless steel pipe and cold-rolled seamless steel pipe

The difference between hot-rolled seamless steel pipe and cold-rolled seamless steel pipe

In terms of processing technology: 

Hot rolling is hot processing, and cold drawing is cold processing. 

Hot rolling is rolling above the recrystallization temperature, and cold rolling is rolling below the recrystallization temperature;

Distinguish from the appearance: 

The cold-rolled seamless steel pipe has a bright surface, and the caliber size is smaller than that of the hot-rolled seamless steel pipe. 

The caliber of hot-rolled seamless steel pipe is larger than that of cold-rolled seamless steel pipe, and the surface has obvious oxide scale or red rust;

In terms of accuracy: 

The accuracy of cold-rolled seamless steel pipes is higher than that of hot-rolled seamless steel pipes, and the price is also higher than that of hot-rolled seamless steel pipes.

Distinguish from the purpose: 

Hot-rolled steel pipes are used in places with low requirements for dimensions such as fluid transportation and mechanical structures, and cold-rolled steel pipes are used in places with high requirements such as precision instruments, hydraulic systems, and pneumatics. In terms of wall thickness, cold-drawn seamless pipes are more uniform than hot-rolled seamless pipes.

Using hot-rolled seamless steel pipe and cold-rolled seamless steel pipe depends on the project, environment, cost request, and material. Different projects have different needs for the steel pipe. We don't need to reduce the purchase of the cost that chooses unsuitable steel pipe for the project. A good steel pipe must be material, project, and environment, etc. These items are met. That is good.