industrial chillers

I have two large chillers (York brand) about 20' long by 4' wide (round) each. Anyone know what these are made of? I've been offered steel price for them but wondering if there's any copper or brass inside. Thanks

Depends, without seeing it I wouldnt want to steer you in the wrong direction. We have gotten them in that the piping inside was steel and the exchange coils were as well. That said I have almost never even in the case mentioned above gotten one in that wasnt worth more than shread price. Ther is however dismanteling costs and what your time is worth.

Some of the small 1hp hobbiest units have titanium coated, maybe solid piping to prevent corrosion. Someone more familiar with commercial A/C can correct me, as these may not need to be anti-corrosive.