Temper Description
Temper Definition
F As fabricated (no mechanical property limits specified).
H12 Strain-hardened - 1/4 hard.
H14 Strain-hardened - 1/2 hard.
H16 Strain-hardened - 3/4 hard.
H18 Strain-hardened - 4/4 hard (fully hardened).
H19 Strain-hardened - extra hard.
Hxx4 Applies to embossed or patterned sheet or strip, fabricated from the corresponding Hxx temper.
H111 Annealed and slightly strain-hardened (less than H11) during subsequent operations such as stretching or levelling.
H112 Slightly strain-hardened from working at an elevated temperature from a limited amount of cold work (mechanical property limits specified).
H116 Applies to aluminium-magnesium alloys with a magnesium content of 4% or more and for which mechanical property limits and exfoliation corrosion resistance are specified.
H22 Strain-hardened and partially annealed - 1/4 hard.
H24 Strain-hardened and partially annealed - 1/2 hard.
H26 Strain-hardened and partially annealed - 3/4 hard.
H28 Strain-hardened and partially annealed - 4/4 hard (fully hardened).
H32 Strain-hardened and stabilized - 1/4 hard.
H34 Strain-hardened and stabilized - 1/2 hard.
H36 Strain-hardened and stabilized - 3/4 hard.
H38 Strain-hardened and stabilized - 4/4 hard (fully hardened).
H42 Strain-hardened and painted or lacquered - 1/4 hard.
H44 Strain-hardened and painted or lacquered - 1/2 hard.
H46 Strain-hardened and painted or lacquered - 3/4 hard.
H48 Strain-hardened and painted or lacquered - 4/4 hard (fully hardened).
T351 Solution heat-treated, stress-relieved by controlled stretching (permanent set 0.5% to 3% for sheet, 1.5% to 3% for plate, 1% to 3% for rolled  or cold-finished rod and bar, 1% to 5% for hand or ring forging and rolled ring) and naturally aged. The products receive no further straightening after
T3511 Same as T3510 except that minor straightening is allowed after stretching to comply with standard tolerances.
T4 Solution heat-treated and naturally aged.
T5 Cooled from an elavated temperature shaping process and then artificially aged.
T6 Solution heat-treated and then artificially aged.
T651 Solution heat-treated, stress-relieved by controlled stretching (permanent set 0.5% to 3% for sheet, 1.5% to 3% for plate, 1% to 3% for rolled or cold-finished rod and bar, 1% to 5% for hand or ring forging and rolled ring) and then artificially aged. The products receive no further straightening after stretching.
T6510 Solution heat-treated, stress-relieved by controlled stretching (permanent set 1% to 3% for extruded rod, bar, shapes and tube, 0.5% to 3% for drawn tube) and then artificially aged. The products receive no further straightening after stretching.
T6511 Same as T6510 except that minor straightening is allowed after stretching to comply with standard tolerances.