M. Bhupatiraju and R. Greczanik
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COLD EXTRUSION is a push-through compressive forming process with the starting material (billet/slug) at room temperature. During the process, however, the deforming material undergoes deformation heating (conversion of deformation work to heat) to several hundred degrees. Typically, a punch is used to apply pressure to the billet enclosed, partially or completely, in a stationary die. Aluminum and aluminum alloys, copper and copper alloys, carbon steels, alloy steels, and stainless steels can be cold extruded. 6061 cited three times in section on Cold Extrusion of Aluminum Alloy Parts.