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Aluminium / Aluminum alloys are sensitive to high temperatures. They tend to lose some of their strength when exposed to high temperatures of about 200-250°C. However, their strength can be increased at subzero temperatures. They also have good corrosion resistance. Aluminium / Aluminum 6061 alloy is the most commonly available and heat treatable alloy.
The following datasheet gives an overview of Aluminium / Aluminum 6061 alloy.
The following table shows the chemical composition of Aluminium / Aluminum 6061 alloy.
|Aluminium / Aluminum, Al
The physical properties of Aluminium / Aluminum 6061 alloy are outlined in the following table.
The mechanical properties of Aluminium / Aluminum 6061 alloy are tabulated below.
The thermal properties of Aluminium / Aluminum 6061 alloy are given in the following table.
|Thermal expansion co-efficient
Other designations that are equivalent to the Aluminium / Aluminum 6061 alloy are listed in the following table.
Fabrication and Heat Treatment
Aluminium / Aluminum 6061 alloy has good machinability in harder T 4 and T6 tempers. It can be machined in an annealed temper.
Aluminium / Aluminum 6061 alloy can be easily formed and worked in the annealed condition. The standard methods are used to perform bending, stamping, deep drawing, and spinning operations.
Aluminium / Aluminum 6061 alloy has excellent weldability. Thinner sections can be welded using the gas tungsten arc welding technique. Heavier sections can be welded using the gas metal arc welding technique. Alloy 4043 filler wire can be used to achieve a good result, but it will affect T 6 properties.
Aluminium / Aluminum 6061 alloy is heat-treated at 533°C (990°F) for a sufficient period of time followed by quenching in water. The precipitation hardening process can be performed at 160°C (320°F) for 18 h followed by air cooling. This process is again repeated at 177°C (350°F) for 8 h followed by cooling in air.
Aluminium / Aluminum 6061 alloy is forged at 233 to 483°C (750 to 900°F).
Aluminium / Aluminum 6061 alloy is hot worked at 260 to 372°C (500 to 700°F).
Aluminium / Aluminum 6061 alloy is cold worked in the O temper condition. It can also be cold-formed in the T 4 and T 6 tempers.
Annealing of Aluminium / Aluminum 6061 alloy can be performed at 775°F for 2 to 3 h followed by controlled cooling at 10 to 260°C (50 to 500°F) per hour, and air cooling.
Aging of Aluminium / Aluminum 6061 alloy can be performed at 177°C (350°F) for 8 h. It is then cooled in air.
Aluminium / Aluminum 6061 alloy is used in the following applications:
- Truck and marine components
- General structural and high-pressure applications
- Heavy-duty structures
- Railroad cars
- Tank fittings