The term extrusion is applied to both the process and the product obtained, when a hot cylindrical billet of aluminium is pushed through a shaped die.

Before this process, the billet is preheated at a temperature between 400°C and 500°C in order to reduce the pressure required for extruding and to achieve the needed mechanical properties.

After extrusion, the profile undergoes the cooling process and the ageing process - at a temperature between 160°C and 210°C - in order to reach and then stabilise the mechanical properties.

The extruded profile can be used in a very versatile way. For example, it can be cut, bent or assembled to be used in buildings especially as windows, doors, and façades.