ARMCO ORIENTED ELECTRICAL STEEL, nominally an iron 4% silicon soft magnetic alloy is available in four grades designated M-2, M-3, M-4, M-6. They have a much lower core loss in the rolling direction than nonoriented grades. Their permeability is high even at high inductions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating and surface treatment. Filing Code: Fe-84. Producer or source: Armco Advanced Materials Company.