... the condition of no magnetic field around,magnet magnetic pass rate less than or equal to 0.05 ... %;2, Time stability 2.1.At room temperature for long-term storage (there is no magnetic ... field) cases, magnetic drop 1 to 2%;2.2. ... Odometer,sensor, telephone, mobile phone,Etc.4.Magnetic property parameters of cast AlNiCo magnet: GradesEquicalent ...