1.The carbon content of hot rolled steel plate is slightly higher than that of cold rolled steel plate. Hot rolled steel plate has low hardness, easy processing and good ductility. The hardness of cold-rolled sheet is high, the processing is relatively difficult, but it is not easy to deform, and the strength is high.

   2.The hot-rolled steel plate has relatively low strength and poor surface quality,but it has good plasticity, generally medium thick plate; the cold-rolled steel plate, with high strength, high hardness, high surface finish, generally thin plate, can be used as stamping plate.

    3.The production process of hot-rolled steel plate and cold-rolled steel plate is different. Hot rolled steel plate is rolled at high temperature, and cold rolled steel plate is rolled at normal temperature. Generally speaking, cold rolled steel plate has better strength and hot rolled steel plate has better ductility. Generally, the thickness of cold rolling is smaller than that of hot rolling. The surface quality, appearance and dimensional accuracy of cold-rolled steel sheet are better than that of hot-rolled steel sheet, and its product thickness can be rolled to about 0.18mm, so it is more popular.