Metallurgically, clarification of "COLD ROLLED STEEL" is needed, as follows:
Cold rolling is a metalworking process in which metal is deformed by passing it through rollers at a temperature below its recrystallization temperature.
Cold rolling increases the yield strength and hardness of a metal by introducing defects into the metal's crystal structure.
Cold rolling is most often used to decrease the thickness of plate and sheet metal from ingots.
Cold rolled metal is given a rating based on the degree it was cold worked. "Skin-rolled" metal undergoes the least rolling, being compressed only 0.5-1% to harden the surface of the metal and make it more easily workable for later processes. Higher ratings are "quarter hard," "half hard" and "full hard"; in the last of these, the thickness of the metal is reduced by 50%.
Cold rolling of steel is a common manufacturing process. It is often used to form sheet metal. Beverage cans are closed by rolling, and steel food cans are strengthened by rolling ribs into their sides. Rolling mills are commonly used to precisely reduce the thickness of strip and sheet metals.