Brackenridge Steel Works, Pennsylvania

ATI, also known as Allegheny Ludlum, operates a steel complex at Brackenridge, recently expanded with a new $1.2 billion hot rolling plant. The company is one of the leaders in the production of  specialty metals, like titanium, magnesium, and hardened steels. It operates several plants around the Pittsburgh region, including at Midland, Natrona, and Vandergrift, and others around the country.