Cold rolled thinner wall steel pipe manufacturer

When choosing materials for a project, it is important to know the difference between the different types of China hollow section available. For example, how is it used? What are advantages of it applied in your industrial or construction project? In a mill, rolling is a key process in metalworking, which can lead to the improved strength and grain orientation needed to accomplish different fabrication techniques and applications. There are two main types of steel rolling; hot rolling and cold rolling. As we have talked much about cold rolled steel vs hot rolled steel in the previous article. Here we would like to talk further about cold rolled steel pipe in the steel pipe market.

Cold rolled steel pipe has been rolled at room temperature, below its recrystallization temperature. This increases its strength and hardness and decreases its ductility. In addition to improvement of mechanical properties, cold rolling results in more control over the shape and dimensions of the finished product. As a rule, cold rolled steel pipe has an improved surface finish and tighter tolerances compared to hot rolled steel pipe. It is commonly used for parts requiring cold forming, such as crimping, swaging or bending. It can also be used for Shafts, machinery parts, bolts, pinions, gears, as well as in the creation of furniture, appliances and other consumer goods. However, the cost of cold rolled steel pipe could be twice as much as the cost of hot rolled steel pipe, as cold rolling is a more complex metal working process than hot rolling in a mill. In that regard, the steel pipe price is relatively high in comparison with hot rolled one in the market.
In actual applications, the cold rolled steel pipe is more precise dimensionally than a hot rolled product that created by hot rolling process, because the cold rolled steel has already gone through the cooling process, which help it closer to the finished dimension while the hot rolled steel forms the finished product looser tolerances than the original material. Compared with cold rolled steel pipe, Hot rolled steel pipe is more malleable, allowing it to be forced into a variety of different shapes such as circular hollow section, square pipe, rectangular pipe and some other shapes of steel products. Today, with the further development of technology in the iron and steel industry, there is also another finishing between hot rolling process and cold rolling process, Pickled and Oiled. By being pickled in acid and oiled, the mill scale on the hot rolled steel can be removed and protect it from rusting. Picking and oiling cost is somewhere in between regular hot rolling and cold rolling.