Temper Designation

F

as Fabricated (no treatment)

O

Annealed

H

Strain Hardened

H1

Strained Hardened Only

H2

Strain Hardened and Partially Annealed

H3

Strain Hardened and Stabilized

W

Solution Heat Treatment, Unstable Temper

T

to Produce Stable Tempers other than F,O, and H

T2

Annealed (Cast Only)

T3

Solution Heat Treated and then Cold Work

T4

Solution Heat Treated

T5

Artificial Aged Only

T6

Solution Heat Treated then Artificially Aged

T7

Solution Heat Treated then Stabilized

T8

Solution heat treated, cold worked, and artificially aged

T9

Solution Heat Treated, Artificially Aged, Cold Worked

T10

Artificially Aged, Cold Worked