Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Forming Welding Heat Treatment Forging Hot Working Cold Working Annealing Aging HardeningApplications
Aluminum alloys have strong corrosion resistance. At subzero temperatures, their strength increases, thus making them a useful low-temperature alloy. Their strength decreases if they are subjected to very high temperatures. The aluminum 7075 alloy has high strength.
The following datasheet gives more details about the aluminum 7075 alloy.
The following table shows the chemical composition of the aluminum 7075 alloy.
The physical properties of aluminum 7075 alloy are tabulated below.
The mechanical properties of aluminum 7075 alloy are outlined in the following table.
|Elongation at break
The thermal properties of aluminum 7075 alloy are given in the following table.
Other designations that are equivalent to aluminum 7075 alloy include:
Fabrication and Heat Treatment
Aluminum 7075 alloy can be machined in the annealed condition. Oil lubricants are used for performing machining operations.
Aluminum 7075 alloy can be formed in the annealed condition. It can be warmed at 94 to 122°C (200 to 250°F) if any difficulty is encountered.
Aluminum 7075 alloy can be welded using resistance welding method. Gas welding method is not preferred for welding this alloy. Arc welding method should also be avoided as it results in degradation of corrosion resistance property of this alloy.
Aluminum 7075 alloy is annealed at (900°F) for 2 h followed by water quenching and precipitation hardening heat treatment.
Aluminum 7075 alloy is forged at 372 to 483°C (700 to 900°F).
Aluminum 7075 alloy can be hot worked at 122°C (250°F)
Aluminum 7075 alloy can be cold worked using conventional methods in soft and annealed condition.
Aluminum 7075 alloy is annealed at 413°C (775°F) for 3 h followed by controlled cooling at 10 to 260° C (50 to 500°F) per hour, and cooling in air.
Aluminum 7075 alloy can be aged at 122°C (250°F) for 24 h to obtain the T 6 temper. The T 73 temper can be heated at 108°C (225°F) for 8 h and at 163°C (325°F) for 24 h followed by air cooling.
Aluminum 7075 alloy can be hardened by precipitation heat treatment.
Aluminum 7075 alloy is mainly used in manufacturing aircraft and other aerospace applications.