Aluminum 2024
Aluminum 2024 – High-Fatigue-Resistance Aircraft Aluminum (Al-Cu-Mg)
Aluminum 2024 is the benchmark aluminum-copper-magnesium alloy for aircraft skin and primary structural applications. It offers excellent fatigue resistance and high strength in T3/T4 temper, making it the standard material for aircraft fuselage panels and wing structures worldwide.
Key Properties
- Tensile Strength: 483 MPa
- Yield Strength: 345 MPa
- Fatigue Strength: 138 MPa
- Elongation: 18%
- Density: 2.78 g/cm³
- Tempers: T3 / T4
Common Applications
Commercial and military aircraft skins, structural ribs, wing panels, and fuselage frames. Typically used with Alclad cladding for improved corrosion protection. Compliant with ASTM B209 / AMS 2770.
Material properties
| Material name | Aluminum 2024 |
|---|---|
| Type | Aluminum |
| Standard code | ASTM B209 / AMS 2770 |
| Tensile strength (MPa) | 483 |
| Yield strength (MPa) | 345 |
| Fatigue strength (MPa) | 138 |
| Elongation (%) | 18 |
| Hardness (Brinell) | 120 |
| Density (g/cm³) | 2.78 |
| Electrical resistivity (µΩ·in) | 5.8 |
| Thermal conductivity (W/m·K) | 121 |
| Melting range (°C) | 500–638 |
| Weldability | Fair |
| Formability | Fair |
| Shear modulus | 28 |
| Industry code | aluminum_2024 |