This is probably a stupid question, but it came to me in a dream.
In the dream, I’m in a huge warehouse. There’s lots of big bins contains various bits of shaped iron. I’m apparently there to buy some of the these bits. I pick up one and examine it and I say to myself (since there’s no on else in the place), “Nope. This one’s been melted too many times.”
Let’s say you take a lump of pure iron and form it into a shape, say, an I-beam. Then you melt it down and formed it again. You do this dozens or even hundreds of times. Will the last casting be as strong as the first one assuming you follow the exact same procedure?