Neodymium magnets are the strongest type of permanent magnet commercially available today . They have a wide range of applications, from simple fridge magnets and DIY projects to complex mechanisms in hard drives, speakers, electric motors, and generators. These magnets are graded by their maximum energy product ((BH)max), measured in Mega Gauss Oersteds (MGOe) . The grade is denoted by the letter "N" followed by a number, such as N35, N42, or N52. The higher the number, the stronger the magnet
Understanding Neodymium Magnet Grades
The "N" rating of a neodymium magnet refers to its maximum energy product, which indicates the strength of the magnet after it has been magnetized . This value represents the magnetic energy density of the magnet and is a key factor in determining its strength. It's important to note that the N rating provides a measure of the potential strength, but the actual strength in a particular application will depend on factors like the magnet's size, shape, and the specific conditions of the application .
Another important aspect of neodymium magnet grades is the intrinsic coercivity (Hci) . Hci is a measure of a magnet's resistance to demagnetization. A higher Hci means the magnet can withstand stronger opposing magnetic fields and higher temperatures without losing its magnetization. This property is linked to the temperature resistance of the magnet, which is often denoted by a suffix letter in the magnet grade (e.g., N35M, N42H) .
These suffixes represent different maximum operating temperatures
