Heat treatment of aluminum castings
Heat treatment
| F | As Cast - Castings are cooled naturally from the mold in room temperature air with no further heat-treatment. |
| T-51 | Aging Treatment - Castings that are artificially aged by heating metal to 400F for 7-9 hours. |
| T-6 | Solution Heat-treated and Artificially Aged - Castings are Solution Heat-treated by heating metal to 1000F for 4-12 hours and quenched in water at 150-212F. |
| T-7 | Solution Heat-treated and Stabilized - Castings are stabilized to carry them beyond the point of maximum hardness, providing control of growth or residual stress, or both. |
Properties of Cast and Wrought Alloys
| Alloy | Heat Treatment* | Tensile Strength, Ultimate (ksi) | Tensile Strength, Yield (ksi) | Elongation in 2 inches (%) | Typical Brinell Hardness (500 kgf load, (10-mm ball)) |
| A356.2 | F | 19 | 3 | 40-70 | |
| A356.2 | T51 | 23 | 16 | 45-75 | |
| A356.2 | T6 | 30 | 28 | 3 | 55-90 |
| A356.2 | T7 | 31 | 29 | 3 | 60-90 |
| A319 | T6 | 31 | 20 | 1.5 | 65-95 |
| 535 (Almag) | F | 35 | 18 | 8 | 60-90 |
| Zinc-ZA8 | F | 38 | 28 | 1.5 | 85-90 |
| Zinc-ZA12 | F | 42 | 30 | 2 | 105-125 |
| 6061 (Wrought) | T6 | 45 | 40 | 12 | 95 |
| A380 (Die Cast) | F | 47 | 23 | 3.5 | 80 |
