I was at the salvage yard today and found some 4.5" x 4.5" steel fin tube radiators. They were 10 feet long and had a 1-1/4" pipe down the center. My question is will these work almost as good as copper fin tube . I have to build my overheat loop for loss of power and also considered placing some tubes under my tile floors. They are big and heavy,but will they work?