TableⅠ: Sintered NdFeB Magnets Grades and Magnetic Properties

Generally, the sintered NdFeB magnet grades are strings containing three parts, i.e. “N”+ “number”+ “letter”. The part “N” is the initial letter of neodymium, meaning it is a sintered neodymium iron boron magnet. So it is constant for all the neodymium magnet grades. The part “number” represents value of maximum energy product (BH)max (in CGS unit). The value varies from 28 to 52. The part “letter” reflects level of intrinsic coercivity Hcj. The levels include “M” (Hcj ≥14 kOe), “H” (Hcj ≥ 17 kOe), “SH” (Hcj ≥ 20 kOe), “UH” (Hcj ≥ 25 kOe), “EH” (Hcj ≥ 30 kOe) and “AH” (Hcj ≥ 35 kOe), they are abbreviations for “Medium”, “High”, “Super High”, “Ultra High”, “Extreme High” and “Abnormal High”, respectively. It should also be mentioned that there is a level where the letter is not available or default. In the situation the Hcj is not less than 12 kOe.

Table Ⅱ: Some Physical Properties of Sintered NdFeB Magnets

Table Ⅲ: Sintered NdFeB Magnets Coating Types

 Table Ⅳ: Sintered NdFeB Magnets Shapes, Magnetization Direction and Size Range

Table V: General Tolerance (mm)

Table Ⅵ: Demagnetization Curves of Neodymium Permanent Magnet