3mm To 24mm Cold Rolled Steel U Channel Galvanized SB BA HL Surface

Stainless Steel 316 304 U Channel C Channel Cold Rolled Steel Channel

Channel steel hot rolling and cold rolling difference

1. Different appearance

If you want to distinguish the difference between hot rolling and cold rolling of channel steel, you should first observe its appearance. It is necessary to know that the surface of channel steel after hot rolling is easy to oxidize, and it looks very rough; The quality of the cold rolled surface is very high, and the size is more accurate.

2, different technology

The temperature required for hot rolling production of channel steel is very high. Basically, it is continuously produced above the recrystallization temperature. The structure and properties of metal generally will not change. But the cold rolled channel steel production process is just the opposite, when the temperature is kept below recrystallization discontinuous production, the cold rolled channel steel will affect the crystal structure of the metal.

3. Different intensities

The strength of hot rolled channel steel is relatively low, but the plasticity is better, and it is easy to weld, so its range of use in daily life is very wide; The strength of cold-rolled channel steel is just opposite to that of hot-rolled channel steel, so its plasticity is poor, and its welding performance is not satisfactory.