Aluminum Tempers

Basic

F Fabricated
A Annealed
H Stained-hardened
W Solution heat-treated
T Thermally treated to produce stable tempers other than F, O, or H

H-Temper: Strain-Hardened

H1 Strain-hardened only.
H111

Applies to wrought products which are stain-hardened less than the amount required for a controlled H11 temper.

H112 Applies to wrought products which acquire some temper from shaping processes not having special control over the amount of strain-hardening or thermal treatment but for which there are mechanical property limits.
H2 Strain-hardened & partially annealed.
H3 Strain-hardened & stabilized.
H311 Applies to wrought products which are strain-hardened less than the amount required for a controlled H31 temper.
H321 Applies to wrought products which are strain-hardened less than the amount required for a controlled H32 temper.
H323 Applies to products which are specially fabricated to have acceptable resistance to stress corrosion cracking.

T-Temper: Thermally Treated

T1
 Cooled from an elevated temperature shaping process and naturally aged to substantially stable condition.
T2

Cooled from an elevated temperature shaping process, cold worked, and naturally aged to a substantially stable condition.
T3 Solution heat-treated, cold worked, and naturally aged to a substantially stable condition.
T31 Solution heat treated and then cold worked by flattening or stretching.
T351 Solution heat treatment and stress relieved by stretching.
T3511 Solution heat treated and stress relieved by stretching with minor stretching allowed.
T36 Solution heat treated and cold worked by a reduction of 6 percent.
T37 Solution heat treated and then cold worked by a reduction of 8 percent.
T4 Solution heat-treated and naturally aged to a substantially stable condition.
T42 Solution heat treated and naturally aged by the user to a substantially stable condition.
T451 Solution heat treated and stress relieved by stretching.
T4511 Solution heat treated and stress relieved by stretching with minor straightening allowed.
T5 Cooled from an elevated temperature shaping process and then artificially aged.
T51 Cooled from an elevated temperature shaping process, stress-relieved by stretching and then artificially aged.
T52 Cooled from an elevated temperature shaping process, stress-relieved by compressing and then artificially aged.
T54 Cooled from an elevated temperature shaping process, stress-relieved by stretching and compressing and then artificially aged.
T6 Solution heat-treated and then artificially aged.
T61 Solution heat treated and then artificially aged.
T611 Solution heat treated and then artificially aged.
T62 Solution heat treated and then artificially aged by the user.
T651 Solution heat treated, stress-relieved by stretching and artificially aged.
T6510 Solution heat treated, stress-relieved by stretching and artificially aged with no hard straightening after aging.
T6511 Solution heat treated, stress-relieved by stretching and artificially aged with minor straightening after aging.
T652 Solution heat treated, stress-relieved by compressive deformation and artificially aged.
T7 Solution heat-treated and stabilized.
T73 Solution heat treated and then specially artificially aged.
T7451 Solution heat treated and then specially artificially aged.
T73511 Solution heat treated and then specially artificially aged.
T7352 Solution heat treated and then specially artificially aged.
T8 Solution heat-treated, cold worked, and then artificially aged.
T81 Solution heat treated, cold worked and then artificially aged.
T851 Solution heat treated, stress-relieved by stretching and artificially aged.
T8511 Solution heat treated, stress-relieved by stretching and artificially aged.
T86 Solution heat treated, cold worked by a thickness reduction of 6 percent and then artificially aged.
T87 Solution heat treated, cold worked by a thickness reduction of 10 percent and then artificially aged.
T9 Solution heat-treated, artificially aged, and then cold worked.
T10 Cooled from an elevated temperature shaping process, cold worked, and then artificially aged.