7079 aluminium alloy
Aluminium zinc alloy
7079 aluminium alloy (UNS designation A97079) is a high strength, heat treatable wrought aluminium alloy used in the aircraft industry. Age-hardening heat treatment enhances the characteristics of AL 7079, eliminating variations in characteristics seen in Aluminium 7075.[1]
Chemical composition
Element | Zn | Mg | Cu | Fe | Si | Mn | Cr | Ti | Remainder (each) | Remainder (total) | Al [2] |
---|---|---|---|---|---|---|---|---|---|---|---|
minimum | 3.8 | 2.9 | .4 | 0.00 | 0.00 | .1 | .1 | 0.00 | 0.00 | 0.00 | Remainder |
maximum | 4.8 | 3.7 | .8 | .4 | .3 | .3 | .25 | .1 | .5 | .15 | Remainder |
Heat treatment for aluminium 7079
- Solution treatment
- Aging treatment
- Annealing treatment
[3]
Machinability
- Alloy 7079 T-6 provides qualities comparable to alloy 7075-T6
- -F condition provides acceptable results
- Improved machinability compared to fabricated and annealed tempers
[3]
Workability
- Can be formed similar to 7075
- Annealing provides superior formability and noticeable decline in workability following solution heat treatment
- Form in “as-quenched” condition for best results
[3]
Applications
- Mobile industry equipment
- Aircraft parts, including wing panels and bulkhead assemblies
- Hydraulic units
- Highly stressed parts
[4]
References
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Aluminium alloys
- Aluminium
- Aluminium alloys
- History of aluminium
- 1050
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- 1145
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- 1461
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- Aluminium–lithium alloys
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- Y alloy
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- AlSi10Mg
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