8505.11.00.70 - Sintered neodymium-iron-boron

This HTS classification, 8505.11.00.70, specifically covers sintered neodymium-iron-boron permanent magnets. These magnets are characterized by their high coercivity and remanence, making them exceptionally strong permanent magnets suitable for a wide range of demanding applications in motors, generators, sensors, and magnetic medical equipment. The manufacturing process involves compacting and sintering finely ground powders of neodymium, iron, and boron to create a dense, high-performance magnetic material.

Distinguishing this category from its siblings, 8505.11.00.10 (Alnico), 8505.11.00.30 (Ceramic), and 8505.11.00.50 (Sintered samarium-cobalt), is crucial. Alnico magnets are typically cast and offer good temperature stability but lower magnetic strength. Ceramic magnets, while cost-effective, possess significantly lower magnetic properties. Sintered samarium-cobalt magnets offer excellent temperature resistance and good magnetic strength, but neodymium-iron-boron magnets generally provide the highest magnetic energy product, making them ideal for miniaturization and applications requiring maximum magnetic force in a given volume. The "Other" category at 8505.11.00.90 serves as a residual for metallic permanent magnets not specifically listed.

As this is a leaf node within the HTS, there are no further subcategories under 8505.11.00.70. Therefore, the classification is specific to sintered neodymium-iron-boron permanent magnets. Classification at this level hinges on the material composition and the manufacturing process (sintering) which results in the distinct magnetic properties that set these magnets apart from other types of permanent magnets.