4. Aluminium alloys for extrusion

4.1 Aluminum alloys without structural hardening

In the as-spun condition (F condition), these alloys are in a state very close to the annealed condition (O condition), which is characterized by maximum ductility and minimum mechanical strength. Additional hardening can be achieved through work-hardening, but this is achieved at the expense of ductility.

In the case of extruded aluminum alloys, work-hardening is generally achieved by drawing or wire-drawing. Hardening options range from annealed O to work-hardened H1x, work-hardened...