What Are Strongest Magnets in the World?

It is well known that the Neodymium magnet is the magnet's king in the world now. But there are many different grade neodymium magnets based on different ingredients for different applications. Which grade of neodymium magnet is the strongest magnets? In the Room temperature environment, N55 magnets , N54 magnets  and N52 magnets  represent the first, second and third strongest magnets in the world that can be industrially produced. Therefore, these magnets are used in specific applications requiring maximum magnetic strength in a small space. Due to its strong magnetic field, the N55 magnet is ideal for fine and delicate work where small size really matters.

The strongest magnets feature:

N55 Neodymium Magnets are currently the most powerful grade of neodymium magnets available for commercial use. In comparison with the common N52 grade, the N55 magnet is about 5-6% stronger, and approximately 1.5-2.0% stronger than the N54 grade. However, the actual performance of these magnets is subject to production conditions and the current manufacturing situation. Responsible NdFeB manufacturers often specify the confirmed minimum magnetic property values to avoid any disputes.

For example, the magnetic properties of N55, N54, and N52 magnets are outlined in the table below:

The magnets are considered qualified as long as their actual performance meets or exceeds the minimum values stated. Therefore, it's possible to receive stronger magnets, even those that meet the performance of N54 or N55 magnets, if you order N52 magnets.

Strong points of N55 neodymium magnets:

• Compare to the magnets that have the same shape and weight, n55 magnet has the most powerful magnetic strength;
•  Various shapes and dimensions are available through the different processing technology like cutting and grinding;
•  Super-strong adhesive force, suitable for small spaces (miniaturization)
• Even the smallest n55 neodymium magnets  are just as strong as larger common ceramic magnets or alnico magnets.

Weak points of N55 Neodymium Magnts:

• N55 Magnets are high-cost, 30% higher than magnets N35;
• N55 Magnets  are more brittle and not resistant to corrosion, an electroplating treatment is necessary;
• N55 Magnets  are not resistant to high temperatures (See Pic 1).

The ingredients of these strongest magnets – N55 Magnets:

These strongest magnets – Neodymium permanent magnet N55 are based on the maximum percent of the intermetallic compound Nd2Fe14B and a small percent of other compounds, such Rich Nd compound.   The magnetic power or magnetic energy has come from the Nd2Fe14B compound, other compounds support magnets informing during sintering and also increase the coercive force of finished magnets.  The detailed ingredients are rare earth elements neodymium (Nd), praseodymium (Pr), dysprosium (Dy), iron (Fe), and boron (B). Among them, the rare earth element is mainly neodymium (Nd). In order to obtain the highest grade N55 magnets , the neodymium magnets manufacturer uses some other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) to replace neodymium (Nd). Iron can also be partially replaced by other metals such as aluminum (Al). The boron content is small, but it plays an important role in the formation of tetragonal crystal structure intermetallic compounds, making the compound have high saturation magnetization, high uniaxial anisotropy, and high Curie temperature.

The Way to make these strongest magnets – N55 Magnets , N54 Magnets , N52 Magnets :

The process of making the strongest magnets such as N55, N54, and N52 magnets involves two main stages: the production of half-finished magnets through a powdered metallurgical process and the finishing of magnets through a machining process. Here are the detailed steps involved:

The process begins by readying the raw materials, which are then melted at a high temperature of about 1500°C. Following this, the raw material undergoes strip casting, where it is shaped into thin strips. Next, hydrogen demolishing is performed to break down the raw material and refine its structure.

The material is then subjected to jet milling, which further refines it into fine powders. Afterward, the powder is pressed under an external magnetic field to align the particles, followed by cold isostatic pressing to ensure uniformity and strength. The next step involves sintering and annealing, where the material is heated to form solid, dense magnets.

After the sintering process, the magnets undergo machining, which includes grinding, slicing, or wire cutting, to achieve the desired shape and size. Finally, a coating is applied to the magnets, typically using materials like Ni, Zn, NiCuNi, or Epoxy, to protect them from corrosion and wear.

Once the magnets are coated, they are packed for shipment, ready for air, sea, or truck transport to their destination. This meticulous process ensures the production of strong, durable magnets with consistent performance.

Available Strongest Magnets Shape and Zize:

 Before machining process, the mainly shapes of half-finished magnets is Block and Cylinder.

1. Block shape size 100x100x30mm Texture along 30mm
2. Cylinder shape size D100x30 Texture axially

Mag Spring make half-finished magnets into different shape and size by machining
Big or Small Block Magnets
Big or Small Disc Magnets
Big or Small Ring Magnets
All kinds of Segment Magnets

Application of the strongest magnets:

These strongest magnets - Neodymium magnets are popularly used in many different fields in mode industrial and life. Almost every Hybrid and Electric Automobile depends on these strong permanent Neodymium magnets. Wind power turbines or generators, marine propulsion, air conditioners motors, smart mobile phones device, audio devices, and many more applications all depend on these strong Neodymium permanent magnets to achieve sleek form factors that create downstream economies in many new systems.

Industrial motors made with these strong NdFeB magnets configured for high uptime with efficiencies over 95% are saving electricity and conserving natural resources. The strongest magnets -magnets N55 N54 and N52 are creating more capabilities in smaller spaces in more applications than ever before.

These strongest permanent magnets deliver the highest performance in the smallest volume of material, making them a very attractive choice for all designers of an increasing number of demanding applications.

N55 Magnets Application Case:

10000pcs strong N55 Neodymium Magnets  125x125x30mm NICUNI are involved in the Magnetic Refrigeration. check the magnetic base on pic 2.

Conclusion 

Thank you for reading our article and we hope it can help you to have a better understanding of the most powerful magnet in the world. If you want to know more about permanent magnets and related magnetic systems, we advise you to visit Mag Spring for more information.

As a leading manufacturer of permanent magnets and magnetic products across the world, Mag Spring® has been involved in R&D, manufacturing, sales of permanent magnets and magnetic systems since the 1990s and can provide customers with high-quality permanent magnetic products like neodymium magnets, SmCo magnets, pot magnets, magnetic hook, grate magnets, shuttering magnets and other non-rare earth permanent magnets at a very competitive price.