1, the surface of the cold-rolled plate has a certain gloss and smooth feel, which is similar to the common steel cup for drinking water.

2. If the hot rolled plate is not pickled, it is similar to the surface of many ordinary steel plates on the market. The rust surface is red and purple-black (mill scale).

The performance advantages of cold-rolled and hot-rolled plates are as follows:

1, the accuracy is higher, and the thickness difference of cold-rolled strip steel is not more than 0.01~ 0.03 mm.

2, the size is thinner, and the thinnest cold rolling can roll 0.00 1mm steel strip; Hot rolling can now be as thin as 0.78 mm

3, the surface quality is superior, and the cold-rolled steel plate can even produce a mirror surface; On the other hand, the surface of hot rolled plate has defects such as iron scale and pitting.

4. The cold-rolled sheet can be adjusted according to the user's requirements for its school-running performance such as tensile strength and stamping performance.

Cold rolling and hot rolling are two different steel rolling technologies. As the name implies, cold rolling is to tie steel at room temperature, which has high hardness. Hot rolling is high temperature steel binding.