Alloy comparison
6061-T6 Aluminum vs 6063-T5 Aluminum
structural vs architectural extrusion
Side-by-side handbook properties for preliminary material selection. Green values mark the preferable metric for that row (higher strength, lower density, better fabrication rating).
6061-T6 Aluminum
6xxx · ASTM B209 / EN AW-6061
The most common general-purpose structural aluminum. Balanced strength, weldability, and machinability. Density 2.70 g/cm³.
Density
2.70 g/cm³
Yield
275 MPa
6063-T5 Aluminum
6xxx · ASTM B221 / EN AW-6063
Best-in-class extrudability and surface finish. Preferred for architectural profiles and anodizing. Density ~2.70 g/cm³.
Density
2.70 g/cm³
Yield
170 MPa
| Property | 6061-T6 Aluminum | 6063-T5 Aluminum |
|---|---|---|
| Density | 2.70 g/cm³ | 2.70 g/cm³ |
| Error if using 2.70 | 0.0% | 0.0% |
| Yield strength | 275 MPa | 170 MPa |
| Tensile strength | 310 MPa | 205 MPa |
| Elongation | 12% | 9% |
| Modulus E | 69 GPa | 69 GPa |
| Weldability | Good | Good |
| Machinability | Good | Good |
| Corrosion | Good | Excellent |
| 1 m² × 10 mm plate | 27.00 kg | 27.00 kg |
Quick selection guide
- Choose 6061-T6 Aluminum when you prioritize structural frames and bike frames, and welding is acceptable.
- Choose 6063-T5 Aluminum when you prioritize extrusions and window frames (note: lower yield than 6061-T6 Aluminum).
- Weight difference on a 1 m² × 10 mm plate: 0.00 kg (6063-T5 Aluminum is lighter).