BLENDALLOY 25-7904 is an 80% nickel-15% iron-5% molybdenum alloy having very high permeability and low coercive force for magnetic cores in such applications as transformer laminations, sensitive magnetic amplifiers and magnetic shielding. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-181. Producer or source: Spang Industries Inc..