I don’t like paying $30+ per pound for tin. For me, copper wire is basically free. From what I’ve read, adding copper raises the melting temperature beyond what I want to deal with. Now I’m wondering if bismuth ($10/lb) would be a good way to reduce the melting temperature of a lead alloy with copper.
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Does bismuth make lead brittle like antimony, or ductile like tin? If that would make a brittle alloy, then I’m not interested. It’s in cerrosafe, so I’m hoping for ductility.