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