Under room temperature working environment, grades N45, N48, N50, N52 are good choice of super strong neodymium magnets when you need strong magnetic force as high as possible. N52 magnets are the strongest, most expensive and more brittle. Grade N35 Magnets are the weakest and least expensive grade in the neodymium magnet industry. N42 magnets are the most chosen neodymium magnet grade because it is a perfect balance between magnetism and price.
If you wanna know if there are grades to choose from at high temperatures, choose from these grade series, such as N30M – N50M (100℃), N30H – N50H (120℃), N30SH – N45SH (150℃), N28UH – N42UH (180℃), N28EH – N38EH (200℃) and N28AH – N33AH (220℃). When the operating temperature exceeds neodymium’s range, samarium cobalt magnet is a right choice of strong magnets.