I am looking at some ingots that have 4% copper. I am interested in using this material for the tin content (90+%). Will the copper melt in my pot (copper melting pt is 1900+ deg). Will it contaminate my mix or is it such a small amount it will not be noticeable. The mix I am looking at is a pewter alloy that has been melted into ingots. Maybe there is copper in WW and range lead and I just don't know it.
Any info would be helpful.