AlNiCo Magnet Cast AlNICo Magnet is very stable, has good corrosion resistance and a typical hardness of 50 Rockwell C.Includs ABS braking system magnets,Reed switch operating magnets,Electricity meter damping magnets, Holding/clamping applications,Microwave applications, Weighing scale damping magnets,Electropermanent systems,Calibration magnets etc.