Home About us Contact us
Aluminium profiles
Technical Information
Aluminum Alloys
Mechanical Properties
Extruder Products
Temper Description


Temper descriptions

All aluminum alloys, regardless of product form, are classified as either heat-treatable or nonheat-treatable, depending upon the method used to attain their maximum strength.

  • Nonheat-treatable alloys: 1xxx, 3xxx, and 5xxx series develop strength characteristics through cold work after extruding, if the section shape permits.
  • Heat-treatable alloys: 2xxx, 6xxx, and 7xxx series, which have the highest strength of all aluminum alloys, attain their maximum strength through controlled heat treatment, sometimes at the extrusion press and sometimes in a separate furnace.

The modification methods applied to heat- and nonheat-treatable alloys are listed in the Temper Designation System below.

A complete alloy-temper designation reads like this: 6063-T5. This designation indicates a particular alloy of the 6xxx series (Mg and Si), which is thermally treated by being cooled from an elevated temperature and artificially aged. 

Typical Tempers for Extrusions