Data sheet AA2024
General properties
Aluminium-copper alloy, typical of aerospace, used also for other demanding applications, whose main properties are high strength, high toughness, good resistance to atmospheric corrosion, good strength at elevated temperatures and good machinability. Tempers are available that cover a wide range of properties
Generally used in form of sheets, plates, rods, bars, tubes.
Ex stock the following tempers are available:
- T3 (sheets, bars and tubes)
- T351 (plates).
- T4 (sheets)
Other tempers are delivered upon request; sheets are manufactured also with cladding.
Typical applications
Structural components with demanding requirements in terms of strength and damage tolerance; parts for service temperature up to 180 °C.
Minimum mechanical properties at room temperature
Sheets and plates
Temper |
Thickness (mm) |
Rm (MPa) |
Rp0.2 (MPa) |
A % |
Bending radius (1)(2) |
BHN (1) |
|
T4 |
0.4 | 1.5 | 425 | 290 | 12 | 4.0 x s | 120 |
| 1.5 | 6.0 | 425 | 290 | 14 | 5.0 x s | 120 | |
T3 T351 |
0.4 | 1.5 | 435 | 290 | 12 | 4.0 x s | 123 |
| 1.5 | 3.0 | 435 | 290 | 14 | 4.0 x s | 123 | |
| 3.0 | 6.0 | 440 | 290 | 14 | 5.0 x s | 124 | |
| 6.0 | 12.5 | 440 | 290 | 13 | 8.0 x s | 124 | |
| 12.5 | 40 | 430 | 290 | 11 | 122 | ||
| 40 | 80 | 420 | 290 | 8 | 120 | ||
| 80 | 100 | 400 | 2850 | 7 | 115 | ||
| 100 | 120 | 380 | 270 | 5 | 110 | ||
| 120 | 150 | 360 | 250 | 5 | 104 | ||
(1) Reference values
(2) Bending at 90°
Bars
Temper |
Thickness (mm) |
Rm (MPa) | Rp0.2 (MPa) |
A % |
T3 |
Up to 50 | 450 | 310 | 8 |
| From 50 to 100 | 440 | 300 | 8 | |
| Da 100 a 200 | 420 | 280 | 8 | |
| Da 200 a 250 | 400 | 270 | 8 |
Tubi
Temper |
Thickness (mm) |
Rm (MPa) | Rp0.2 (MPa) |
A % |
T3 |
Up to 30 | 420 | 290 | 8 |
Mechanical properties at elevated and low temperature
The following graph shows ultimate strength at temperature as % of ultimate strength at room temperature, after holding at temperature for different times.
Ultimate strength at temperature
The following graph shows yield strength at temperature as % of yield strength at room temperature, after holding at temperature for different times.
Physical properties
Specific gravity 2.780 g/cm3 at 20 °C
Thermal conductivity at 20 °C: 126 W/m °C
Elastic modulus: 72600 Mpa
Linear thermal expansion coefficient
Temperature °C |
10-6 mm/mm °C |
-50 > 20 |
21.1 |
20 > 100 |
22.9 |
100 > 200 |
23.8 |
200 > 300 |
24.7 |
Technological properties
Ease of machining: good
Ease of cold forming; poor in T3 and T4 temper; good in 0 temper
Ease of welding: poor (TIG - MIG)
Fatigue strength
The following graphs show fatigue strength in tension for various notch factors and various stress ratios, following the US data presentation tradition.
For info on symbols see section INFO Per chiarimenti sulla simbologia vedere la sezione Info.
