"FRY" embossed on top, "91.75" and a serial number on the bottom.
I'm guessing (aside from the nails) that these pieces are all aluminum.
Hard to see in the pic, but some of the scraps still have sections that look like crumpled foil.
I'm fairly certain the nails are iron.
Mother-in-law recently passed away. She was trained in all sorts of sculpture and especially enjoyed casting iron. I'm guessing most of this stuff, including the ingot, are aluminum though. How do I tell the difference?