About bronze & gunmetal scrap
Because tin is expensive, bronze generally carries a higher rate than brass, and the two are easy to confuse. A bronze bush is noticeably heavier in the hand than a brass fitting of the same size and shows a reddish tone at a fresh cut. Selling bronze inside a brass lot is one of the more common ways customers lose money.
Phosphor bronze bushes and bearings from engineering plants are the most frequent industrial source, along with gunmetal valve bodies and pump impellers. Bearings often have a steel backing shell with a thin bronze lining; those are graded as bearing scrap, not solid bronze, because the recoverable alloy is only a fraction of the weight.
Bells, lamps and cast idols are also bronze family metal. We buy these as scrap by weight, but if a piece looks like it has resale or heritage value we will say so rather than melting something that is worth more intact.