Aluminum 6061 is the versatile, cost-effective choice for most applications with excellent weldability and corrosion resistance. Aluminum 7075 offers nearly double the strength for aerospace and high-stress applications but at higher cost and with poor weldability.
| Property | Aluminum 6061-T6 | Aluminum 7075-T6 |
|---|---|---|
| Tensile Strength | 310 MPa (45 ksi) | 572 MPa (83 ksi) |
| Yield Strength | 276 MPa (40 ksi) | 503 MPa (73 ksi) |
| Hardness | 95 HB (Brinell) | 150 HB |
| Density | 2.70 g/cm³ | 2.81 g/cm³ |
| Machinability Rating | 90/100 | 70/100 |
| Thermal Conductivity | 167 W/m·K | 130 W/m·K |
| Melting Point | 582–652 °C | 477–635 °C |
| Tolerance | ±0.005 mm | ±0.005 mm |
| Property | Aluminum 6061-T6 | Aluminum 7075-T6 | Winner |
|---|---|---|---|
| Tensile Strength | 310 MPa | 572 MPa | Aluminum |
| Machinability | 90/100 | 70/100 | Aluminum |
| Corrosion Resistance | Excellent | Good | Aluminum |
| Weldability | Excellent | Poor | Aluminum |
| Cost | ~$3/lb | ~$5/lb | Aluminum |
| Fatigue Resistance | Good | Excellent | Aluminum |
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