Mitsubishi Steel Mfg.Co Ltd engages in the manufacture and sale of special steels, spring, casting and forging materials, and machinery. It offers its products in varied categories; special steel bars unit handles the manufacture and sale of steel bars that includes machine structural alloy steel, carbon steel for machine structural use, and bearing steel. Springs products include coil, leaf, and precision springs, press assembly, and shoe plate for rubber pad. Formed and fabricated products cover the manufacture and sale of steel and precision casting, precision machined component, alloy material, and special alloy and fine powder. Machinery business manufactures and sells press machine, general industrial and plant machinery, environmental equipment, and magnetic separator.