Cold rolled steel coils refer to steel coils manufactured through cold rolling technology. Its characteristic is that it has a certain texture on the surface, with a thickness generally between 0.4-3.0mm, and is widely used in the manufacturing of household appliances, automobiles, electronic products, and other fields. Cold rolled steel coils can be divided into several categories: general purpose cold rolled steel coils, container plate cold rolled steel coils, transportation vehicle cold rolled steel coils, and construction cold rolled steel coils.