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Aluminum Alloys Temper designation and subdivisions

Engineering Materials and Specifications

Basic temper designation and subdivisions from aluminum alloys

Basic temper designations and subdivisions from aluminum alloys.

NON HEAT-TREATABLE ALLOYS
HEAT-TREATABLE ALLOYS
Temper Designation
Definition
Temper Designation
Definition
-0 Annealed recrystallized (wrought products only) applies to softest temper of wrought products. -0 Annealed recrystallized (wrought products only) applies to softest temper of wrought products.
-H1 Strain-hardened only. Applies to products which are strain-hardened to obtain the desired strength without supplementary thermal treatment. -T1 Cooled from an elevated temperature shaping process (such as extrusion or casting) and naturally aged to a substantially stable condition.
-H12 Strain-hardened one-quarter-hard temper. -T2 Annealed (castings only).
-H14 Strain-hardened half-hard temper. -T3 Solution heat-treated and cold-worked by the flattening or straightening operation.
-H16 Strain-hardened three-quarters-hard temper. -T36 Solution heat-treated and cold-worked by reduction of 6 percent
-H18 Strain-hardened full-hard temper. -T4 Solution heat-treated.
-H2 Strain-hardened and then partially annealed. Applies to products which are strain-hardened more than the desired final amount and then reduced in strength to the desired level by partial annealing. -T42 Solution heat-treated by the user regardless of prior temper (applicable only to 2014 and 2024 alloys).
-H22 Strain-hardened and partially annealed to one-quarter-hard temper. -T5 Artificially aged only (castings only).
-H24 Strain-hardened and partially annealed to half-hard temper. -T6 Solution heat-treated and artificially aged.
-H26 Strain-hardened and partially annealed to three-quarters-hard temper. -T62 Solution heat-treated and aged by user regard-less of prior temper (applicable only to 2014 and 2024 alloys).
-H28 Strain-hardened and partially annealed to full-hard temper. -T351,
-T451,
-T3510,
-T3511,
-T4510, -T4511.
Solution heat-treated and stress relieved by stretching to produce a permanent set of 1 to 3 percent, depending on the product.
-H3 Strain-hardened and then stabilized. Applies to products which are strain-hardened and then stabilized by a low temperature heating to slightly lower their strength and increase ductility. -T651,
-T851,
-T6510,
-T8510,
-T6511,
-T8511.
Solution heat-treated, stress relieved by stretch-ing to produce a permanent set of 1 to 3 percent, and artificially aged.
-H32 Strain-hardened and then stabilized. Final temper is one-quarter hard. -T652 Solution heat-treated, compressed to produce a permanent set and then artificially aged.
-H34 Strain-hardened and then stabilized. Final temper is one-half hard. -T8 Solution heat-treated, cold-worked and then artificially aged.
-H36 Strain-hardened and then stabilized. Final temper is three-quarters hard. -T/4 Solution heat-treated, cold-worked by the flattening or straightening operation, and then artificially aged.
-H38 Strain-hardened and then stabilized. Final temper is full-hard. -T86 Solution heat-treated, cold-worked by reduction of 6 percent, and then artificially aged.
-H112 As fabricated; with specified mechanical property limits. -T9 Solution heat-treated, artificially aged and then cold-worked.
-F For wrought alloys; as fabricated. No mechanical properties limits. For cast alloys; as cast. -T10 Cooled from an elevated temperature shaping process artificially aged and then cold-worked.
  -F For wrought alloys; as fabricated. No mechanical properties limits. For cast alloys; as cast.

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