Cold Rolled Closed Annealed (CRCA)

Cold Rolled Steel Strip is produced, as the term suggests by the further rolling of HR (HOT ROLLED) STRIPS. Prior to cold rolling, the surface scale of HR has to be removed, normally by the Pickling Process which uses mechanical manipulation (around small diameter rolls) and acid to dissolve the surface scale. The surface is then washed to remove the acid and a light oil added to prevent rusting.

• Improve the surface finish
• Improve the thickness tolerances
• To offer a range of “tempers”
• As a preparation for surface coating
• Cold-rolling steel is the process of steel flattening by passing the steel through a series of rollers. It is called Cold Rolling (or Cold Rolled) because the steel is kept below its recrystallization temperature. Cold rolling steel makes it up to 20% stronger and improves the surface finish. Cold-rolled sheets and strips come in various conditions: full-hard, half-hard, quarter-hard, and skin-rolled.