Numbers following T Continued
| Designations | Definition | Example | ||
|---|---|---|---|---|
| T | Thermally treated to achieve properties | |||
| T3 | 51 | Solution heat treated and cold worked, stress relieved by stretching | 2024-T351 | |
| T4 | Solution heat treated | 2017-T4 | ||
| T6 | 51 | Solution heat treated, artificially aged, stress relieved by stretching | 6061-T651 | |