Allright.
I don't have a casting set-up at present, but several of my friends do.
They generally cast Aluminum, a few Cast Brass or Bronze and one fellow has been experimenting with Aluminum Bronzes--I forget the specifics, but he got the first batch of Aluminum Bronze due to some sort of...
I'm not a Metallurgist and I'm looking for a high alloy iron that melts at low temperatures and is mold friendly like regular cast iron, but has noticeably more tensile and compressive strength than most cast irons--preferably close to the strength of the better chrome moly steels like 4330...