In aluminium extrusion, a homogenised billet is heated, loaded into a press container and pushed by a ram through a die. The metal emerges as a continuous profile with the die shape, is cooled (quenched), stretched straight, cut to length and aged to the required temper, usually T5 or T6. Most extrusions are made from 6063, with 6061, 6082 and 6005 for higher strength.
Why it matters when buying
- Specify alloy and temper, profile drawing or die number, weight per metre, length, dimensions / tolerance and surface finish.
- New profiles need a die; ask about die cost, ownership and lead time.
- Weight per metre drives price because extrusions are sold by weight; check it against the drawing on delivery.
- Finish options include mill finish, anodised and powder coated, each with its own quality checks.
Typical uses
Windows, doors and facades, solar module frames and mounting structures, LED and electronics heat sinks, furniture, T-slot framing, automotive and railway profiles. Offcuts become extrusion scrap. Browse extrusions.