Temper descriptions

Name Description
Name Description
T6 Solution heat-treated and then artificially aged.
T3 Solution heat-treated, cold worked and naturally aged.
H24 Strain-hardened and partially annealed - 1/2 hard.
H244 Applies to embossed or patterned sheet or strip, fabricated from the corresponding Hxx temper.
H112 Slightly strain-hardened from working at an elevated temperature from a limited amount of cold work (mechanical property limits specified).
T9 Solution heat-treated, artificially aged and then cold worked.
T5 Cooled from an elavated temperature shaping process and then artificially aged.
T6 Solution heat-treated and then artificially aged.
T7 Solution heat-treated and then artificially overaged.
T6511 Same as T6510 except that minor straightening is allowed after stretching to comply with standard tolerances.
T4 Solution heat-treated and naturally aged.
T8 Solution heat-treated, cold worked and then artificially aged.
H18 Strain-hardened - 4/4 hard (fully hardened).
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.
T1 Cooled from an elevated temperature shaping process and naturally aged.
H34 Strain-hardened and stabilized - 1/2 hard.
H12 Strain-hardened - 1/4 hard
H16 Strain-hardened - 3/4 hard.
T73 Solution heat-treated and then artificially overaged in order to achieve the best stress corrosion resistance.
H19 Strain-hardened - extra hard.
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
H14 Strain-hardened - 1/2 hard.
H114 Applies to embossed or patterned sheet or strip, fabricated from the corresponding Hxx temper.
T3510 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 naturally aged. The products receive no further straightening after stretching.
T66 Solution heat-treated and then artificially aged - mechanical property level higher than T6 achieved through special control of the process (6000 series alloys).
H22 Strain-hardened and partially annealed - 1/4 hard.
T7351 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 overaged in order to achieve the best stress corrosion resistance. The products receive no further straightening after stretching.
H111 Annealed and slightly strain-hardened (less than H11) during subsequent operations such as stretching or levelling.
H32 Strain-hardened and stabilized - 1/4 hard.
H42 Strain-hardened and painted or lacquered - 1/4 hard.
T451 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 stretching.
O Annealed - products achieving the required annealed properties after hot forming processes may be designated as O temper.
H44 Strain-hardened and painted or lacquered - 1/2 hard.
T7451 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 overaged (between T73 and T76). The products receive no further straightening after stretching.
T4511 Same as T4510 except that minor straightening is allowed after stretching to comply with standard tolerances.