Ampco-Pittsburgh Corporation and its subsidiaries engage in the manufacture and sale of custom-engineered equipment in the United States and internationally. The company operates through two segments, Forged and Cast Rolls, and Air and Liquid Processing. The Forged and Cast Rolls segment produces forged hardened steel rolls used in cold rolling by producers of steel, aluminum, and other metals; and cast rolls for hot and cold strip mills, medium/heavy section mills, and plate mills. It supplies cast rolls to the metal working industry. The Air and Liquid Processing segment manufactures finned tube and plate finned heat exchange coils for the commercial and industrial construction, as well as for process and utility industries; custom air handling systems used in commercial, institutional, and industrial buildings; and a line of centrifugal pumps for the refrigeration, power generation, and marine defense industries. The company was founded in 1929 and is based in Pittsburgh, Pennsylvania.