Heat Treatment and Tempers of Aluminium Extrusion

F

Fabricated

T1

Cooled from an elevated temperature shaping process and naturally aged.

T2

Cooled from an elevated temperature shaping process, cold worked and naturally aged.

T3

Solution heat-treated, cold worked and naturally aged.

T4

Solution treated and naturally aged

T5

Cooled from an elevated temperature shaping process and artificially aged.

T6

Solution heat-treated then artificially aged.

T7

Solution heat-treated and then artificially aged.

T8

Solution heat-treated, cold worked and artificially aged.

T9

Solution heat-treated artificially aged and cold worked.

T351

Solution heat-treated, stress relieved by stretching a controlled amount. The aluminium receives no further straightening after stretching. Applies to plate, rolled or cold finished rod and bar, to die or ring forgings and to rolled rings.

T3510

Solution heat-treated by stretching a controlled amount and naturally aged. The aluminium receives no further straightening after stretching. Applies to extruded rod, bar, shapes and tubing and to drawn tubing.

T3511

As T3510 but also refers to products that may receive minor straightening after stretching to comply with standard tolerance.

T352

Applies to products that are stress –relieved by compressing after solution heat treatment or after cooling from a hot – working process to produce a permanent set of 1 to 5 %.

T651

Solution heat-treated, stress relieved by stretching a controlled amount and then artificially aged. The aluminium receives no further straightening after stretching.

T6510

Solution heat-treated, stress relieved by stretching a controlled amount and then artificially aged. The aluminium receives no further straightening after stretching.

T6511

As T6510 except that minor straightening is allowed after stretching to comply with standard tolerances.

T73

Solution heat-treated and then artificially overaged in order to achieve the best stress corrosion resistance.

T732

Solution heat-treated and then artificially overaged in order to achieve the best stress corrosion resistance.

T7651

Solution heat-treated, stress relieved by stretching a controlled amount and then artificially over aged in order to achieve a good exfoliation corrosion resistance. The aluminium receives no further straightening after stretching.

T76510

Solution heat-treated, stress relieved by stretching a controlled amount and then artificially over aged in order to achieve a good exfoliation corrosion resistance.The aluminium receives no further straightening after stretching.

T76511

As T76510 except than minor straightening is allowed after stretching to comply with standard tolerances.