Cold rolling is made of hot-rolled coils as raw materials, which are rolled at room temperature below the recrystallization temperature. Cold rolled steel sheet is a steel plate produced through a cold rolling process, referred to as cold plate. The thickness of cold-rolled sheet is generally between 0.1--8.0mm. The thickness of cold-rolled sheet produced by most factories is below 4.5mm. The thickness and width of cold-rolled sheet are determined according to the equipment capacity and market demand of each factory.

Low-carbon steel is based on carbon content to distinguish steel, low-carbon steel, medium-carbon steel, etc. High-quality carbon structural steel with low carbon content is low-carbon steel, and No. 20 steel is common. Cold rolled steel sheet is classified by the way of steel forming, hot rolling, cold rolling, etc. For cold rolling, low carbon steel is usually used for cold rolling, and high and medium carbon steel is generally not suitable for cold rolling. This does not mean that cold rolled steel is only low carbon steel, because adding various alloying elements to low carbon steel can Different alloy steels are obtained, such as phosphorus-added high-strength steel and low-alloy high-strength steel. These steels are also steel plates after cold rolling, but the grades are different.

Cold rolled steel sheet has good performance, that is, through cold rolling, rolled strip and steel sheet with thinner thickness and higher precision can be obtained, with high flatness, high surface finish, clean and bright surface of cold rolled sheet, and easy to be coated. It has a wide range of processing and varieties, and has a wide range of uses. At the same time, it has the characteristics of high stamping performance, no aging, and low yield point. Therefore, cold-rolled sheets have a wide range of uses, mainly used in automobiles, printed iron drums, construction, building materials, bicycles and other industries. At the same time, it is also an ideal material for the production of organic coated steel sheets.