Aluminium, Commercial Alloy
6063 O Bar & Extrusion
One of the most popular alloys in the 6000 series and most widely known as an architectural alloy.
Aluminium alloy 6063 is a medium strength alloy commonly referred to as an architectural alloy. It is normally used in intricate extrusions and is most commonly supplied in the T6 temper.
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6063 O Aluminium Related Specifications
| System / Standard | Country / Region | Grade / Designation |
| AA | USA | 6063-O |
| UNS | International | A96063 (6063-O) |
| EN / DIN | Europe | EN AW-6063-O |
| EN Name | Europe | AlMg0.7Si-O |
| GB | China | 6063-O |
| JIS | Japan | A6063-O |
| BS | UK | 6063-O (extruded profiles) |
Properties
Chemical Composition
Alloy 6063
| Chemical Element | % Present |
| Manganese (Mn) | 0.00 - 0.10 |
| Iron (Fe) | 0.00 - 0.35 |
| Magnesium (Mg) | 0.45 - 0.90 |
| Silicon (Si) | 0.20 - 0.60 |
| Zinc (Zn) | 0.00 - 0.10 |
| Titanium (Ti) | 0.00 - 0.10 |
| Chromium (Cr) | 0.00 - 0.10 |
| Copper (Cu) | 0.00 - 0.10 |
| Other (Each) | 0.00 - 0.05 |
| Others (Total) | 0.00 - 0.15 |
| Aluminium (Al) | Balance |
Mechanical Properties
Rod & Bar Up to 200mm Dia.
| Mechanical Property | Value |
| Tensile Strength | 130 Max MPa |
| Elongation A50 mm | 16 Min % |
| Hardness Brinell | 25 HB |
| Elongation A | 18 Min % |
Tube Up to 25mm Wall Thickness
| Mechanical Property | Value |
| Tensile Strength | 130 Max MPa |
| Elongation A50 mm | 16 Min % |
| Hardness Brinell | 25 HB |
| Elongation A | 18 Min % |
General Physical Properties
| Physical Property | Value |
| Density | 2.70 g/cm³ |
| Melting Point | 600 °C |
| Thermal Expansion | 23.5 x 10-6/K |
| Modulus of Elasticity | 69.5 GPa |
| Thermal Conductivity | 200 W/m.K |
| Electrical Resistivity | 0.035 x 10-6 Ω .m |
Applications
- Extrusions
- Window frames
- Doors
- Shop fittings
- Irrigation tubing
- In balustrading the rails and posts are normally in the T6 temper and formed elbows and bends are T4
- Hydro formed tube for chassis
Characteristics
- High corrosion resistance
- Medium strength
- Good surface finish
- Readily suited to welding
- Easily anodised
- Good formability in the T4 condition
Additional Information
Weldability
- 6063 is suitable for all conventional welding methods.
- Welding wire generally should be alloy 5183 or alloy 4043.
- When maximum electrical conductivity is required use alloy 4043.
- For strength and conductivity use alloy 5346 and increase the size of the weld to compensate for the lower conductivity.
| Process | Rating |
| Weldability - Gas | Excellent |
| Weldability - Arc | Excellent |
| Weldability - Resistance | Excellent |
| Brazability | Excellent |
| Solderability | Good |
Fabrication
| Process | Rating |
| Workability - Cold | Average |
| Machinability | Average |
