Are you sure that you need them to be of that large diameter……….that is one chunk of brass to bend, whether anealed or not.
because every time you bend the brass one way or another to get conformity, you loose the anealed advantage as the brass reverts back to a semi solid state again and then you have to go through the process of annealing it again to cherry red which eventually weakens it.
if i were you i would try with 3mm brass, as i am sure that would still be strong enough for you.
Edited By neil howard-pritchard on 19/03/2021 00:15:40