Cold Rolled Coil

The manufacturing of Cold Rolled (CR) coils is carried out using the rolling (metalworking) processes. For CR coils, the temperature of the steel is maintained below its re-crystallization temperature (usually room temperature). After the steel is melted below its re-crystallization temperature, it is passed through pairs of rolls (between the small gaps) to reduce its thickness and achieve uniformity. This process of manufacturing CR coils is termed as ‘cold rolling’.

The cold rolling process helps to obtain the CR coils from the cooling (in the cold rolling mill) of hot rolled pickled products (made from finest steel), that are reduced to much finer thickness with increased strength via strain hardening (up to almost 20%). The resulting CR coils are smaller as compared to the coils formed by the hot rolling process, and they are less ductile. They possess improved surface finish and tighter tolerances.

Thanks to the corrosion-resistance and high impact strength exhibited by these cold rolled coils, they are in great demand in the chemical industry, cement industry, wind mills, power plants, and so on.