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| Temper | Treatment | Use |
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| T1 | The elevated temperature fabrication process followed by stable temper aging. | The products are not worked at ambient temperature following elevated temperature fabrication. The product properties cannot recognize the ambient temperature straightening and flattening effects. |
| T2 | The elevated temperature fabrication process followed by ambient temperature working and stable temper aging. | The strength of the products is enhanced by ambient temperature working and the product properties can recognize the flattening or straightening effects. |
| T3 | Solution heat treated, cold worked, and aged to a substantially stable condition. | The strength of the products is enhanced by ambient temperature working after solution treatment and the product properties can recognize the flattening or straightening effects. |
| T4 | Solution heat treated and aged to a substantially stable condition. | The products are not worked at ambient temperature following solution heat treatment. The product properties cannot recognize the ambient temperature straightening and flattening effects. |
| T5 | Cooled from an elevated temperature shaping process and artificially aged. | The products are not worked at ambient temperature following elevated temperature fabrication. The product properties cannot recognize the ambient temperature straightening and flattening effects. |
| T6 | Solution heat treated and then artificially aged. | The products are not cold worked after solution heat-treatment or in which the effect of cold work in flattening or straightening may not be recognized in mechanical property limit. |
| T7 | Solution heat treated and overaged/stabilized. | The artificial aging of the wrought product after the solution heat-treatment to beyond the point of highest strength. |
| T8 | Solution heat treated, ambient temperature worked, and then artificially aged. | The strength of the products is enhanced by ambient temperature working after solution treatment and the product properties can recognize the flattening or straightening effects. |
| T9 | Solution heat treated, artificially aged, and then work hardened. | The work hardening to enhance strength after artificial aging. |
| T10 | Cooled from an elevated temperature shaping process, cold worked and then artificially aged. | The products which are cold worked to improve strength or in which the effect of cold work in flattening or straightening is recognized in property limits. |
| Tx51 | Stress relieving before ageing. | |
| Tx52 | Stress relieving by compressing. | |
| Tx54 | Stress relieving by combined stretching and compressing. | |
| T72 | Corrosion resistance is enhanced by overaging. | |
| T73 | Corrosion resistance is enhanced by step aging. | |
| T76 | Step aging leading to enhancement of exfoliation corrosion behavior | |
| T73x51 T76x51 | Combined stress relieving/step ageing | |
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