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Temper Designations for Aluminum Alloys

F

As fabricated

H

Strain-hardened (wrought products only)

H1

Strain-hardened only

H111

Applies to products which are strain-hardened less then the amount required for a controlled H11 temper.

H112

Applies to 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 and partially annealed

H3

Strain-hardened and stabilized

H311

Applies to products which are strain-hardened less then the amount required for a controlled H31 temper.

H321

Applies to products which are strained-hardened less then the amount required for a controlled H32 temper.

H343

Applies to products which are a specially fabricated to have acceptable resistance to stress corrosion

O

Annealed

T

Thermally treated to produce stable tempers other then F, O, or H.

T1

Cooled from an elevated temperature shaping process and naturally aged to a 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.

T4

Solution heat-treated and naturally aged to a substantially stable condition.

T5

Cooled from an elevated temperature shaping process and then artificially aged.

T6

Solution heat-treated and then artificially aged.

T7

Solution heat-treated and stabilized.

T8

Solution heat-treated, cold worked, and artificially aged.

T9

Solution heat-treated, artificially aged, and cold worked.

T10

Cooled from an elevated temperature shaping process, cold worked, and artificially aged.

T_51

Stress-relieved by stretching.

T_510

Not straightened after stretching

T_511

Minor straightening allowed after stretching

T_52

Stress-relieved by compressing.

T_54

Stress-relieved by combined stretching and compressing.

W

Solution heat-treated.