About

About Proterial America, Ltd. Proterial, Ltd. is a global supplier of castings, cable, steel-related products, clad metal and foil products. Additionally, Proterial is a leading supplier of permanent magnets (ferrite and rare earth type) and soft magnetic materials including soft ferrite, nanocrystalline, and amorphous metal components. Proterial, Ltd. is a global supplier of castings, cable, steel-related products, clad metal and foil products. Additionally, Proterial is a leading supplier of permanent magnets (ferrite and rare earth type) and soft magnetic materials including soft ferrite, nanocrystalline, and amorphous metal components.