The most common alloy used for intricate extrusions, aluminum 6063 is one of the most frequently used and popular of all alloys of aluminum. Also commonly known as architectural alloy, it is a medium strength alloy with many uses.
The alloying elements of aluminum 6063 are silicon and magnesium. The Aluminum Association maintains the standard of controlling the composition of aluminum 6063.
It is similar in its composition and properties to HE9, the British aluminum alloy.
The alloy allows complex shapes to be formed from it with highly smooth surfaces. The surface of aluminum alloy makes it suitable for anodizing which makes it very popular for architectural applications such as sign frames. Roofs, door frames and window frames. For applications that require high strength, 6082 and 6061 are better to be used instead.
Chemical Composition of Aluminum 6063
The alloy composition of 6063 aluminum includes the following:
- 0.2% – 0.6% silicon
- No minimum – 0.35% of iron
- No minimum – 0.10% of copper
- No minimum – 0.10% of manganese
- 0.45% – 0.9% of magnesium
- No minimum – 0.10% of chromium
- No minimum – 0.10% of zinc
- No minimum – 0.10% of titanium
- Other elements constituting to no more than 0.15% in total and 0.05% of each
- The rest of it is aluminum
6063 Mechanical Properties
The mechanical properties of aluminum 6063 depend on the heat treatment or the temper of the material.
- 6063-O alloy has the highest tensile strength of 130 MPa. This alloy elongates to up to 18% before facing ultimate failure.
- The tensile strength of 6063-T1 is 120 Mpa and an elongation ability of 12%.
- The ulitmate tensile strength of 6063-T5 alloy is 140 Mpa with an elongation of 8%.
- 6063-T6 has the ultimate tensile strength of 140 MPa at least with an elongation of 10%.
Uses of 6063 Aluminum
The most common uses of 6063 aluminum are found in the architectural industry where it is commonly used for architectural fabrication. It is used to make the frames of doors and windows, and also to make aluminum furniture, tubes, and pipes. In addition, it is highly weldable. To weld aluminum 6063, tungsten inert gas welding needs to be used. The properties of the alloy near the weld are almost the same as the ones of 6063-O mentioned above.