Annealed Aluminium Sheet

In zone refined aluminum this reversion may take place at room temperature.

Annealed aluminium sheet.

The non heat treatable aluminum alloys may be torch annealed many times to achieve the necessary shape. You can see that welding clamps were also used for tight short bends. Both proper heat application and temperature measurement are important. Any involved forming can lead to cracking or fatiguing the material but annealing can reduce these problems.

Fairings and fillets in particular require such heavy working and such great changes in shape that frequent annealings are quite necessary. It s frequently fabricated into raceways decorative trim and other parts where strength and hardness are not required. The sheet work is now nearing completion and the zippo top is taking shape. The soft annealed aluminium is beaten over various diameter pipes with a soft mallet.

The main reason to anneal aluminum is to improve malleability.