COLD ROLLED SHEET

Cold rolled sheet steels* are produced from a hot rolled pickled coil which has been given substantial cold reduction at room temperature. The resulting product usually requires further processing (annealing/temper passing—see below) to make it suitable for most common applications.

The usual end product is characterized by:

• improved surface
• greater uniformity in thickness**
• improved mechanical properties (compared to hot rolled)

*Carbon levels typically do not exceed 0.15% for sheet products.
**Cold rolled sheet products are available up to .142” thick.

FURTHER PROCESSING

Annealing, a heat treat process that restores some or nearly all of the ductility lost from mechanical work (cold rolling). The annealing process causes a recrystallization of the grains which returns them to their pre-cold roll conditions. This process makes the steel ductile and less hard, for better forming/shaping.

A further process is temper rolling, which is used to give steel its final mechanical properties and surface finish.