Proterial, Ltd. manufactures and sells specialty steel products, functional components and equipment, magnetic materials and applications/power electronics materials, wires and cables, and related products in Japan, the United States, China, the rest of Asia, Europe, and internationally. The company offers molds and tool steels; rolls for steel mills; plastic-molding machine cylinders and parts for steel-frame structures and processing of related components; turbine wheels for turbo charger; materials for use in vanes and engine valves; metallic interconnector materials; soft magnetic alloys; metal-injection molding titanium sintered and cobalt optical communications parts; aerospace devices; corrosion, wear, and heat resistant alloys; specialty steel-alloys for electronic products; and metal additive products. It also provides automotive castings, including aluminum battery cases for electric vehicles; aluminum motor housings; engine/exhaust components; diesel particulate filters; and cast-iron products, as well as piping components, magnetic materials, nanocrystalline soft magnetic materials, and other distinctive materials, and ceramic components. The company was formerly known as Hitachi Metals, Ltd. and changed its name to Proterial, Ltd. in January 2023. The company was founded in 1910 and is headquartered in Tokyo, Japan. Proterial, Ltd. is a subsidiary of Hitachi, Ltd.