Aluminum ac coils

The tubes are often but not always 6061 aluminum which, along with 6063, does have an extrusion premium. Only on the most massive scales does it make even a little sense to separate them and then only with a machine shredder. No matter how much spare time you have it is not worth separating them

Should clarify that not every yard even has a 6061 price. Sometimes will sell as old sheet (clean aluminum sheet) or mlcc (100% clean unpainted alumimum) which is another argument against stripping. Fwiw where I work we buy large quantities of Al scrap from businesses that produce scrap but also from other scrapyards and so far as I know we've never even once from anybody bought Al radiator tubing *at all* outside of buying radiators whole.