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6063
Aluminum 6063 – Architectural & Bus Alloy Busbar
6063-T6 / 6063-T5
Overview
Aluminum 6063 is the most common extrusion alloy, offering excellent surface finish, good corrosion resistance, and 53% IACS electrical conductivity. In bus pipe applications, 6063-T6 is the standard alloy for Schedule 40 pipe because of its excellent balance of electrical and mechanical properties. It carries higher current than 6061-T6 at the same dimensions due to its 23% higher conductivity. 6063 is also the standard for architectural extrusions, window frames, and anodized trim.
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Aluminum (Al) | Balance (~98.5%) | — |
| Magnesium (Mg) | 0.45% | 0.90% |
| Silicon (Si) | 0.20% | 0.60% |
| Iron (Fe) | — | 0.35% |
| Copper (Cu) | — | 0.10% |
Alloy Designations
UNSA96063
ASTMB221, B241
Common NameArchitectural Aluminum
Mechanical Properties
Tensile Strength (T6)35 ksi (241 MPa)
Yield Strength (T6)31 ksi (214 MPa)
Elongation (T6)12%
Hardness (T6)73 HB
Shear Strength22 ksi (152 MPa)
Physical Properties
Density2.70 g/cm³ (0.098 lb/in³)
Melting Point616–654°C (1,140–1,210°F)
Electrical Conductivity (T6)53% IACS
Thermal Conductivity201 W/m·K
Coefficient of Thermal Expansion23.4 × 10⁻⁶ /°C
Modulus of Elasticity68.9 GPa (10,000 ksi)
Typical Applications
- Standard bus pipe conductor (Schedule 40/80)
- Architectural extrusions and window frames
- Anodized trim and decorative profiles
- Electrical conduit and raceways
- Furniture and railing systems
Fabrication & Joining
- Excellent extrusion characteristics — best surface finish
- Good weldability with 4043 filler
- Outstanding anodizing response
- 53% IACS conductivity — standard for bus pipe
- Available in pipe, tube, and custom profiles