The grading of NdFeB magnet usually follows the rule of "performance grade + temperature grade", directly expressing the two most critical types of information about the magnet.
Performance Grade: The Core of Magnetic StrengthNumerical part (such as N "35"): Represents the maximum energy product of the magnet, which is the core indicator for measuring the strength of the magnet. Unit: Usually MGOe (megagauss- oersted) or kJ/m³. The larger the number, the stronger the "magnetic force" of the magnet and the greater the attractive force.
Temperature Grade: Indicator of High-Temperature ResistanceLetter suffix: The letter following the number indicates the intrinsic coercivity and the maximum operating temperature of the magnet. The higher the intrinsic coercivity, the stronger the magnet's ability to resist demagnetizing factors such as external magnetic fields or high temperatures. Grade sequence: From low to high, common ones are N, M, H, SH, UH, EH, AH, etc.
The following table clearly shows the temperature characteristics of mainstream grades, which you can quickly refer to.
Grade ExampleFor example: N48SH N: NdFeB magnet.
48: The maximum energy product is approximately 48 MGOe
SH: Ultra-high coercivity, with a maximum operating temperature of up to 150℃.
