H |
Strain
hardened (cold worked) with or without thermal treatment. |
H1 |
Strain
hardened without thermal treatment. |
H2 |
Strain
hardened and partially annealed. |
H3 |
Strain
hardened and stabilized by low temperature heating. |
Last digit
|
A last
digit represent hardness. |
|
Hx2 = 1/4
hard. |
|
Hx4 = 1/2
hard. |
|
Hx6 = 3/4
hard. |
|
Hx8 = full
hard. |
|
O |
Full Soft
(annealed). |
T1 |
Heat treated
to produce stable tempers. |
T2 |
Partially
solution heat treated and naturally aged. |
T3 |
Solution
heat treated and cold worked. |
T4 |
Solution
heat treated and naturally aged. |
T5 |
Partially
solution heat treated and artificially aged. |
T51 |
Stress
relieved by stretching. |
T510 |
No further
straightening after stretching. |
T511 |
Minor
straightening after stretching. |
T52 |
Stress
relieved by thermal treatment. |
T6 |
Solution
heat treated and 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. |
|
|