While I'm trying to decide what to cast some plaques out of, I found
an interesting melting temperature according to this chart.
I want to use some kind of bronze since plain aluminum patinas will
(This project if for my palm tree arboretum project I mentioned).
According to The Engineer's Tool Box on the above link,
Aluminum-Bronze alloy melts at only 1215 F. They can't possibly be
talking about commonly used alloys of Aluminum-Bronze that I can find
because any Aluminum Bronze I know of has typical bronze melting
temperatures of over 2000 F.
I thought Aluminum-Bronze must be over 90% copper or the
Aluminum-Bronze would be too brittle? There are no 50/50 Aluminum
Bronze mixtures that would not be brittle. But to have a melting
temperature of only 1215 are they talking about an Aluminum Bronze
that is over 90% Aluminum and they just add a little copper?
Now if that's the case, I am interested. (The lower melting
temperature would make my set up for casting large plaques easier)
If this is what they are talking about, (A large percentage of
aluminum with just a little bit of copper), will this 10 to 12% of
copper be enough for me to chemically patina and stay an interesting
Thanks for any help.