Warren Steel Holdings LLC, which operates at the former Copperweld Steel complex, said that it has added new equipment to expand its product line. The company said it now can produce steel rounds 6 inches in diameter, adding to its current offerings of 8.5 inch, 10.6 inch and 12.25 inch. The company completed major refurbishment of the former CSC site, including the melt shop, ladle refining furnace, four…