Quote:
Originally Posted by Fred Brackin
Making brass from scratch would indeed be difficult. One page I googled a few years ago had it be a 17 step process with multiple forming dies and 3 trips through an "annealing oven" which I'm not quite sure what is. Some sort of heat treatment.
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For brass you do that to relax the work hardening (which all copper alloys suffer from). It's not a real precise target temperature, several hundred degree range for brass, though of course the minimum time you need to hold it there is temperature dependent.
Annealing is usually something you do to relax internal stresses like work hardening in metals or differential cooling in glasses, though it presumably means something different in iron metallurgy.