ge_rik wrote: Tue Jan 09, 2018 9:12 am
Might try annealing to see how much difference that makes and presumably has the added advantage of removing any coatings.
You need to be careful annealing aluminium, as the annealing temperature is fairly close to the melting point. Unlike other metals you can't just bring it up to red heat and let it cool down, as the melting point is below a visible red heat.
Also, it won't get hot enough to burn off the epoxy coating used on the inside of a drink can before the metal melts. All the coating does is turn brown.
This link below has some instructions for annealing aluminium in the home workshop, using soap as a temperature indicator, which is the common model engineering trick.
http://steamshed.com/annealing%20process.html
Here in Oz, because most new roofs are prepainted steel and lead flashing can't be used, aluminium flashing is available in rolls. It is annealed and the metal is about twice the gauge of pie pans.
Regards,
Graeme