Extrusion billet is made by casting lengths of up to 7m and is available in a wide variety of alloys and dimensions to suit specific needs.

The extrusion process involves pressing a preheated aluminum billet under high pressure through a die the opening of which corresponds to the cross-section of the extrusion -- much like toothpaste being squeezed through a nozzled tube. The number of tons of pressure exerted determines how large an extrusion it can produce. The hardness of the alloy determines how fast it passes through the press.

A completed extrusion is cut off at the die and quenched, mechanically adjusted and aged. Depending on billet size and die opening, a continuous extrusion up to 200 feet long can be produced in one press stroke.