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N54 Magnets | Remanence Br over N52 grade​

Introduction of N54 neodymium magnets (N54 neodymium iron boron)

N54 magnets are the most powerful N series neodymium magnet that can be mass produced. But oftentimes, N52 magnet is still considered the most powerful permanent magnet in applications for holding purpose. With the increasing requirement for higher magnetic flux density from magnetic separation and filtration producers, the mass production of N54 has become available at some of the large-scale NdFeB manufacturers. Because there is no current international standards, some manufacturers and customer also use the name – N55 magnet.

Application fields of N54 magnets

From an application point of view, N54 magnet has a residual flux density of 14.5 kGs to 15.0 kGs, which means it is 2-3% more powerful than N52 magnets. N54 magnets are typically used in applications with limited space but requires huge magnetic strength. In the magnetic separation, equipment makers want to bring the surface gauss of some magnetic separator models to an extreme level. In such cases, N54 magnet lends itself to an ideal material.

N54 magnet neodymium block magnet

Comparison: N52 vs. N54 rare earth magnets

To some extent, there is a trade-off between remanence(Br) and coercivity(Hc). A higher remanence could mean a lower Hc value. In the case of N54 magnets, the magnet is theoretically more susceptible to demagnetization.

In order to increase the Br and maintain Hc, there is a difference between the production of N55 and others. Instead of using praseodymium-neodymium(PrNd) alloy, we use pure neodymium (Nd) metal to make NdFeB alloy because neodymium contributes more to the increase of Br than praseodymium. That means the cost difference between N52 and N54 is much bigger. That’s why N52 neodymium magnet still dominates the market despite the fact that N54 has been commercially available for a long time. 

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