Cold rolled steel is essentially hot rolled steel that has been further processed by cooling to room temperature and annealing or temper rolling. Cold rolling produces steel with tighter dimensional tolerances and a wider range of surface finishes than hot rolling. It is also up to 20% stronger than hot rolled by using resistance hardening.
In producing more precise shapes, the process involves:
ADVANTAGES OF COLD ROLLED STEEL
COLD ROLLED STEEL APPLICATIONS
Cold rolled steel is used in Used in applications where tolerances, surface finish, concentricity and straightness are important factors. It also offers a more aesthetic and visually appealing interface. Other applications include:
aerospace structural components
Simply put, cold rolling is the process of strengthening steel by changing its shape without the use of heat. In contrast to hot rolling, as with hot-rolled steel, cold rolling can only take place if a metal is below its recrystallization temperature. When hot rolling is performed at high temperatures, cold rolling is performed at room temperature. Instead of heat, mechanical stress is used to change the structure of the metal. Work hardening can increase metal strength by up to 20%, and can also improve the surface finish of the metal.
During the cold rolling process, when the metal is subjected to mechanical stress, this causes a permanent change in the crystal structure of the metal. This causes an increase in its strength and often improves its resistance to corrosion. In addition to improving the surface finish, another benefit of cold rolling is better dimensional accuracy.