Extruded aluminum is produced through a process in which the application of pressure forces heated aluminum billets or logs through a metal die. The die is in the shape of the particular part being formed, such as a channel or tube. Aluminum is a great extrusion metal due to its unique combination properties. Although aluminum is one-third the weight of copper, brass or steel, the extrusion process results in a very strong part, because it can distribute the metal to where it is needed. Aluminum is self-protected from corrosion by its own thin, transparent oxide film. Aluminum alloys can be easily joined by welding, brazing and soldering. Conventional equipment can readily form or bend extruded aluminum shapes. Aluminum also has high electrical conductivity and is a good heat conductor and reflector, making it ideal for heat transfer and heat shield applications.
Extruded aluminum parts remain quite abundant and include tubing, vehicle components, computer parts, window and doorway frames and kitchen and other domestic appliances. Aluminum extruded products are often used as feedstock for aluminum wire, drawn tubing and rod and bar products. Aluminum extrusions range in size from one-millimeter parts weighing a few ounces to parts several meters in length weighing one ton or more. In addition to standard aluminum parts available in stock sizes and shapes, aluminum extruders produce custom extrusions to meet specific customer needs in the construction, automotive, medical, aerospace and telecommunications industries.