"Mary Fisher" wrote in message
. net...

"The Natural Philosopher" wrote in message
...

I
assume that hot bending isn't appropriate for ali, neither is any form
of heat softening or hardening a practical proposition.


Actually, they are. Heating and slow cooling anneals. Heating and fast
cooling re-hardens.

NONONO! Not with Al!

Yes, given the right alloy, equipment and procedures, (see my other post).
It is not, however, a home project. Even with a professional metal workshop,
I send the stuff away to a specialist heat treatment company.

Colin Bignell