1. Different colors
There is oil on the surface of the cold-rolled sheet, and the silver white is similar to stainless steel;
The surface of the hot-rolled sheet is brown, the color is inconsistent, or there are patterns but no oil.
2. Different texture edges
The texture of the cold-rolled sheet is smooth, with neat edges;
The surface texture of the hot-rolled sheet is rough, the shape is not cold-rolled, and the edges are sometimes irregular.
3. Different specifications
Cold-rolled sheets are generally thin gauges and thicknesses below 3.0mm (except for customization), silver-white is galvanized sheet, and color is color-coated sheet;
The hot-rolled plate is generally 1.5mm or more (except for customization), the thinnest is not less than 1.0, and has a temperature-change oxidation pattern.
4. Different hardness
The cold-rolled plate has high hardness and is relatively difficult to process, but it is not easy to deform and has high strength;
The hot-rolled steel sheet has low hardness, easy processing and good ductility.
5. Different production processes
Cold rolling is rolling at room temperature, cold rolled steel plate has better strength, and the thickness of cold rolled is relatively small;
Hot-rolled steel sheets are rolled at high temperatures and have better ductility, and hot-rolled steel sheets can have a larger thickness.