Many plastics and rubbers are made on a rolling mill. This is sometimes referred to as a calendar mill. Many plastics used in automotive brake pads are rolled on a rolling mill. There are many types of plastics that are rolled, such as polyurethane and polypropylene.
Six-high rolling mills are the similar to 4-high rolling mills however, they have work rolls, intermediate rolls, and back up rolls. Refer to Drawings (right), which shows a 6-high reversing mill for rolling light gauge steel.
By increasing the carbon content, steel can be made hot at temperatures above 1200oF. Normally, high carbon steel is further heat treated, such as quenched and tempered, to increase the yield and tensile strengths.