Residual magnetism: The surface field Br, which is retained after the permanent magnet is magnetized to technical saturation and the external magnetic field is removed, is called the residual magnetic induction strength. Abbreviated as remanent magnetism, expressed in Br, the unit is mT (KG) milliTesla. KG is the electromagnetic unit system, read as kiloGauss. The conversion relationship 1T = 10000GS.

Energy level remanent magnetism Gs

N30 10800 / N33 11300 / N35 11700

N38 12300 / N40 12700 / N42 13000

N45 13300 / N48 13800 / N50 14000

N52 14300