Cold-rolled coils use hot-rolled coils as raw materials. During cold rolling, the rolled pieces are rolled below the recrystallization temperature. Generally, steel rolled pieces are rolled at room temperature. Silicon steel sheets with high silicon content have high brittleness and low plasticity and need to be preheated to 200°C before cold rolling. Since no heating is performed during the production process of cold-rolled coils, there are no defects such as pitting and oxide scale that often occur in hot rolling, and the surface quality is good and the finish is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and structure of the products can meet some special usage requirements, such as electromagnetic properties, deep drawing properties, etc. Cold-rolled coils are widely used in automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc. General specifications: thickness 0.15-3mm, width 550-1530mm, coil outer diameter Φ1000-2500mm, coil inner diameter Φ410-610mm. Maximum weight: 45 tons.