Copper is excellent for brewing. Depending on how old the item is, it may have been constructed with lead / tin solder?
Post a pic, I'm curious what you have?
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It might be very difficult to take apart and reassemble. A lot of those old boilers are crimped together in a lap seam and then soldered. Possibly better to keep it as an antique.
Well it has become a wood bin. After a closer look I found a puncture in the bottom seam that will not be easy to close. Thanks to all for responding but unfortunately it has become a moot point. However after spending a day a local junk stores a found a 10 gal SS milk/ cream can. It's made a of very heavy SS and doesn't even have a scratch on it. How about $85 bucks. I think I did well!