![]() The Neodymium Iron Boron magnets (NdFeB magnets) were developed just over 25 years ago and were first commercially available in 1984. For note, there is nothing rare about Rare Earth magnets – the required elements are readily available and the NdFeB magnets are produced in several hundreds of tonnes each year. NdFeB is also called a Rare Earth magnet because Neodymium is a Rare Earth element, having a value of 60 on the Periodic Table. The Neodymium magnets are also known as Neo magnets, Neodymium Iron Boron magnets, Neodymium-Iron-Boron magnets, Neodymium Magnets, NdBFe magnets, NdFeB magnets, NIB magnets, Super Strength magnets and Rare Earth magnets (please note that SmCo is also called a Rare Earth magnet). ![]() The NdFeB magnets are then sintered to fuse the powder together before final machining and magnetising producing the completed super strength Neodymium magnet. The Neodymium magnets are anisotropic sintered magnets – the alloy is jet milled to a fine powder and is then compacted in the presence of a magnetic field to give it a preferred direction of magnetisation. We offer 53 grades of licensed standard corrosion resistance Neodymium Iron Boron Magnets and now an additional 72 grades of improved corrosion resistance Neodymium Iron Boron Magnets, each type with 30 types of coating finish for each grade (125 grades in total with 34 finishes – 4250 combinations). The NdFeB magnets are the strongest type of magnet commercially available and are manufactured in a wide range of shapes, sizes and grades. Neodymium Iron Boron Magnets (“”Neo””, NdFeB or Neodymium) are made from an alloy containing, amongst others, the elements Neodymium, Iron and Boron (NdFeB). If you can’t find what you’re looking for, Apex Magnets offers custom magnets as well.Buy Neodymium Magnets online with Bunting – eMagnets™ When you are ready to buy, Apex Magnets offers a huge selection of neodymium magnets perfectly suited for a variety of applications. ![]() Of course, our customer service team is standing by if you need help. Since you know how neodymium magnets are rated, you should have a pretty good idea of what you need for your facility. Finally, the SH means the magnet’s max working temperature is about 150☌, and its Curie temperature is between 340☌ and 350☌. ![]() The 30 tells us its max energy production is 30 MGOe. The N tells us the magnet is primarily made of neodymium. Say you have a magnet with the following spec: N-30SH. Now that you understand N-Ratings, let’s practice. You’ll also need to keep an eye on your budget as these magnets are generally more expensive than those that aren’t designed to withstand high temperatures. If you need a magnet with high heat resistance and high strength, you’ll want a magnet with a high numerical rating as well. In general, the more heat resistance a neodymium magnet has, the weaker it will be. In order to withstand high temperatures, the neodymium needs to mix with other, weaker metals. Neodymium magnets that can withstand higher temperatures aren’t pure neodymium. When using a magnet with an N-rating that includes letters, proceed with caution. Here’s what you can expect for each letter combination: Letter These letters signal the maximum working temperature (the temperature at which the magnet will begin to lose strength) and the Curie temperature (the temperature at which the magnet will lose all magnetism). Once you’ve read the N and the following integers, you need to consider whether there are any letters after the numbers. For example, an N-42 magnet is about 2% stronger than an N-40 magnet. For every increase of 1, the magnet’s strength increases by about 1%. If a magnet has a grade of N-42, it has a maximum energy product of 42 MGOe. In general, the number indicates the strength of the magnet, measured in Megagauss Oersted (MGOe). The numbers, however, are more complicated. The N stands for neo, an industry simplification of neodymium. Neodymium magnets are categorized by N-ratings, typically formed by an N, then a number, and then sometimes a couple more letters. Each one is unique, and there’s no simple formula for translating a system from one magnet type into the system for another.īecause the classification systems are so different, it’s important to understand each magnet’s rating system so you can prevent magnet failures and potentially costly or dangerous situations. Every type of rare earth magnet, whether neodymium, AlNiCo, or something else, has its own alphanumerical system for classifying strength.
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