What is a NdFeB Magnet, Everything You Need to Know!


What is a NdFeB Magnet

A neodymium magnet (also known as NdFeB, NIB, or Neo magnet) is the most widely used type of rare-earth magnet. It is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. Neodymium magnets are the strongest type of permanent magnet available commercially.

Advantages of NdFeB Magnets

The main advantages of NdFeB magnets are as follows:

  • Best power to weight ratio of all magnets
  • High resistance to demagnetization
  • Often the most cost-effective choice
  • Ideal for restricted space or compact applications. 
  • Can be used in extremely cold conditions (e.g. in liquid nitrogen).
  • High coercivity (Hci) to resist demagnetization.
  • NdFeB magnets have stronger corrosion resistance. 

Disadvantages of NdFeB Magnets

  • Requires a protective coating to prevent the iron in the alloy from corroding (rusting).
  • NxxT and L-NxxT alloys are much more expensive and will still show signs of corrosion.
  • Higher temperature versions contain more Dy element increasing their cost.
  • Nd and Dy prices affect the production cost.
  • Above 150-180°C (302-356°F), SmCo may be better.

What Are the Main Applications of NdFeB Magnets?

Bonded NdFeB magnet is mainly used in sensor, brushless motor, automotive electronic gas pedal, automotive instrumentation, automotive instrumentation drive, automotive tachometer, fuel gauge and other fields.

Difference Between Neodymium Magnet and Regular Magnet

The key difference between the Neodymium magnet and a Regular Magnet is that the neodymium magnet contains neodymium, iron, and boron as the key chemical elements whereas the regular magnet contains iron as the key chemical element. A neodymium magnet is a form of strong magnet made from rare earth elements such as neodymium.

How Are NdFeB Magnets Made?

There are several processes for making magnets, but the most common method is called Powder Metallurgy. In this process, a suitable composition is pulverized into a fine powder, compacted, and heated to cause densification via “liquid phase sintering”. Therefore, these magnets are most often called sintered magnets.

What Grades and Shapes Are Neodymium Magnets Available?

Grades N30, N35, N38, N40, N42, N48, N50, and N52 are available for all shapes & sizes of NdFeB magnets. We stock these magnets in the disc, bar, block, rod, and ring shapes. Not all of our neodymium magnets are shown on this website so please contact us if you don't see what you are looking for. We can also custom manufacture these to meet your special requirements, just send us a Special Request and we'll help you determine the most economical solution for your project.

What is the Best Temperature to Use with Neodymium Magnets?

These magnets should not be used in temperatures above 130° C (240° F) without careful magnetic circuit design. Please contact us to discuss your application with our engineers if you plan on using these magnets above this temperature.

Best Neodymium Magnet Supplier Recommended

Giantank Magnet Co., Ltd. is a neodymium magnet manufacturer from China. We sell a large number of rare earth magnetic materials and NdFeB magnets overseas every year.

With years of experience designing and manufacturing high-performance magnetic systems, we supply critical magnetic components to some of the leading brands in the most demanding industries. We have become a leading manufacturer and supplier of magnets and magnetic components.

If you're still not sure which magnet is right for your company's latest project, you can contact our team for advice, or browse our extensive catalog.

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