I got a bunch of lead from my father in laws garage after he passed a few years ago. I was mixing up an alloy today and threw in a roll of sheet lead to lower the bhn. I was keeping the mix at about 600 degree's. the sheet did not melt until I upped the temp to 650. It looks like lead, I can scratch it with my fingernail and it is really soft and bends real eaisy. Possibly Tin?