HIPERNIK is an alloy of iron and nickel in nearly equal proportions with small amounts of manganese and silicon added. It has exceptionally high initial and maximum permeability and extremely low hysteresis loss. 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, and joining. Filing Code: Ni-26. Producer or source: Westinghouse Electric Corporation.