The national standard provides the main magnetic properties of sintered NdFeB permanent magnet materials, test methods, inspection rules and signs, packaging, transportation, storage. The standard also gives typical values for other physical properties such as primary mechanical properties and secondary magnetic properties. The standard applies to the production of sintered powder NdFeB permanent magnet（strong small magnets） materials. The standard is based on the actual production, sale and application of sintered Nd-Fe-B materials in China and reference to the product brands of each enterprise. At the same time, it adopts the advanced foreign standards such as Japan equivalently and refers to and actively adopts the International Electrotechnical Commission IEC 404-8-1 (1986), "Magnetic Materials Part 8: Specifications for Special Materials, Section I Standard Specification for Hard Magnetic Materials" and Supplement 2 (1992), the technical level of the standard is compatible with the current international standards and foreign The same level of advanced standards. Since the implementation of this standard in November 2000, nearly 150 enterprises across the country have adopted this standard and have set their own standards based on this standard, which has beneficially standardized the production and sale of sintered NdFeB permanent magnet materials（strong magnets for sale） , Promoted technological transformation of enterprises and improved quality of products, reduced trade disputes among manufacturers and users, and enabled the export of domestic products and the better standardized development of NdFeB permanent magnet materials industry. At the same time, it provides the basis for the design of permanent magnet materials and the development of new products, which further promote the application and development of permanent magnet products and produce good economic and social benefits.
Article from NdFeB Industry Network