N52 magnet, also referred as N52 Neodymium magnet, has a maximum energy product (BH)max of 52 Mega-Gauss Oersted (MGOe). For sintered Neodymium magnet, the magnetic strength increases as the grade number gets higher, then magnetic field or pull force yielded by N52 magnet is much stronger than another frequently-used grade N35. Therefore, devices using N52 magnets would have significantly higher output performance or have smaller and lighter structure. The specific grade is a macro magnetic properties stemming from material composition and microstructure. In term of material science perspective, N52 magnet has higher density, lower rare earth element content and alloy composition is much closer to Nd2Fe14B main phase in comparison with other lower grades. N52 grade used to be the strongest commercially available magnet in a very long time. Even if the N54 and higher grades already have mass production capability currently, N52 magnet is always treated as the most powerful solution in the majority of applications.
There is no doubt that N52 magnets can yield much stronger magnetic power compared with lower grade, thus many customers mistakenly suppose that overall performance of N52 grade is definitely better than other grades owing to the superior (BH)max value. In reality, (BH)max value alone could be not the only factor in determining magnet grade. Numerous other application details must be taken into consideration when selecting the applicability of grade. N52 magnets are still one of the most expensive grades. Its magnetic performance may exceed the actual demand in considerable instance and a lower grade will offer adequate power with significantly lower cost. In addition, many customers which assuming their application really does need N52 be trapped by lower fake grades. These customers have a great similarity that lack in quality measurements, then get the lower grade with N52 demagnetization curve.
