Sintered NdFeB Magnets

Invented by Mr. Masato Sagawa from Sumitomo Metals Japan in 1982, Neodymium-Iron-Boron, aka NdFeB, is a tetragonal crystal mainly consisting of neodymium, iron and boron (Nd2Fe14B). The major manufacturing methods developed from power metallurgy process by Sumitomo Metals to melt-spinning process by GM.Nowadays, NdFeB is the strongest ever permanent magnet, as well as the most frequently chosen rare earth magnet.NdFeB magnet’s energy product ranges from 28MGOe to 58MGOe. Neodymium magnets are composed mostly of Neodymium as well as Iron and Boron. Since the magnets contain Iron, they are prone to rust. As a result, it’s important to coat NdFeB Magnets to prevent rusting. Coating also helps to strengthen the magnets. There are a number of coating options for NdFeB Magnets. Nickel is the most popular coating material for NdFeB Magnets. Vector Magnets, however goes a step further and gives NdFeB Magnets a triple plating with layers of nickel and copper and then a nickel coating is applied again. The triple coating ensures our NDFEB magnets last longer (are more durable) than most (if not all) NdFeB Magnets out there in the market today. It’s important to note that most NdFeB Magnets on sale today are single plated. Our NdFeB Magnets are therefore the best in regards to durability. It's also worth noting that Vector Magnets offer numerous coating options apart from nickel coating. For instance, you can request for a zinc, copper, tin, epoxy, silver or even a gold coating. Gold plated NDFEB magnets are quadruple plated with; nickel, copper, then nickel again before they are given a top gold coating. Neodymium magnets are graded depending on the material that makes them i.e. N35, N38, N38SH, N42, etc... As a general rule of thumb, the higher the grade i.e. the number following the letter 'N', the stronger the magnet. The strongest Neodymium magnet (or simply the highest grade Neo magnet) available in the market today is the N54 (N56 now is available in labs.) Any letter or letters that follow the grade i.e. SH in N38SH represent the temperature rating of the magnet. In case there’s no letter or letters following the grade, the magnet is said to be a standard temperature neodymium magnet. NdFeB Magnets have standard temperature ratings (no designation). The ratings include; M, H, SH, UH, EH. Please note you can find all the temperature ratings of each Neodymium magnet grade on our Neodymium magnets specifications page.