Annealed Aluminium Sheet

Both proper heat application and temperature measurement are important.

Annealed aluminium sheet.

Avoid machining aluminum in its annealed state it s really sticky and it doesn t cut cleanly any more. The main reason to anneal aluminum is to improve malleability. Fairings and fillets in particular require such heavy working and such great changes in shape that frequent annealings are quite necessary. The non heat treatable aluminum alloys may be torch annealed many times to achieve the necessary shape.

It s frequently fabricated into raceways decorative trim and other parts where strength and hardness are not required. You can see that welding clamps were also used for tight short bends. The soft annealed aluminium is beaten over various diameter pipes with a soft mallet. The sheet work is now nearing completion and the zippo top is taking shape.

The distorted dislocated structure resulting from cold working of aluminum is less stable than the strain free annealed state to which it tends to revert.