Precision Alloys have special physical and mechanical properties, and are extensively applied in the key elements and devices of precision motor, electric appliance, instruments and meters, telecommunicat-ion equipments, and precision machines. 1.Soft magnetic alloys Characteristics: high magnetic permeability, material: 1J79, 1J85, 1J86, 1J851, MH80, MH1, MH2etc. Characteristics: high saturation induction density, material: 1J21, 1J22 Characteristics: high magnetic permeability and high saturation magnetic induction density, material: 1J46, 1J50 Characteristics: having the property of magnetic temperature compensation, material: 1J31, 1J32, 1J33, 1J38 Characteristics: having the property of rectangular hysteresis loop, material: 1J51 Characteristics: having the property of the third electromagnetic effect(used in computer valve), material: 1J36,1J117