The Aluminum Tempers are as follows: (and there are more as well)
T1: Indicates the alloy was cooled from an elevated temperature shaping process like hot rolling, then naturally aged resulting in a stable condition and not subsequently cold worked to increase strength
T2: Like T1 but cold worked and naturally aged.
T3: Solution heat treated, cold worked and naturally aged….Our 2011-T3 example is typically cold drawn and naturally aged in bar products.
T4: Solution heat treated and naturally aged…2017-T4 would not require any cold work between solution treatment and ageing to achieve properties
T5: Cooled from an elevated temperature shaping process and then artificially aged. 6063 – T5 extrusions would be aged after cooling from the extrusion temperature.
T6: Solution treated and artificially aged…Our example of 7075-T6
T7: Solution heat treated and stabilized… 7075-T7351 from our examples.
T8 : Solution heat treated, cold worked, and then artificially aged. 2011-T8 would be an example here
T9 : Ssolution heat treated, artificially aged and then cold worked
T10: Cooled from elevated temperature shaping ,cold worked and then artificially aged.