Okay this sounds like some thing i need more info on,did you occur to weigh the coil befor you cut it up? how much copper vs aluminum did you recuperate.and if i may ask grade of aluminum is the yard supplying you with for the fins/coils thanks

This is not a coil however a straight section of baseboard heat type radiator. I did not weigh something beforehand as they were all random lengths, I suppose I might have minimize a one foot section and did a earlier than and after.

The copper pipe on these is thin walled a variety of instances, not the denser pipe used for plumbing. I’m guessing at the ratio of about 80% copper to 20% aluminum. Copper went as #2 due to solder joints and aluminum fins went as sheet.