6061 is the general-purpose choice with excellent weldability and corrosion resistance. 2024 is the aerospace-optimized alloy with superior fatigue resistance and higher strength for aircraft structural applications.
| Property | Aluminum 6061-T6 | Aluminum 2024-T3 |
|---|---|---|
| Tensile Strength | 310 MPa (45 ksi) | 483 MPa (70 ksi) |
| Yield Strength | 276 MPa (40 ksi) | 345 MPa (50 ksi) |
| Hardness | 95 HB (Brinell) | 120 HB |
| Density | 2.70 g/cm³ | 2.78 g/cm³ |
| Machinability Rating | 90/100 | 70/100 |
| Thermal Conductivity | 167 W/m·K | 121 W/m·K |
| Melting Point | 582–652 °C | 502–638 °C |
| Tolerance | ±0.005 mm | ±0.005 mm |
| Property | Aluminum 6061-T6 | Aluminum 2024-T3 | Winner |
|---|---|---|---|
| Tensile Strength | 310 MPa | 483 MPa | Aluminum |
| Fatigue Resistance | Good | Excellent | Aluminum |
| Corrosion Resistance | Excellent | Poor | Aluminum |
| Weldability | Excellent | Not weldable | Aluminum |
| Machinability | 90/100 | 70/100 | Aluminum |
| Cost | ~$3/lb | ~$4/lb | Aluminum |
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