UAMA B74的目的。19-2016旨在建立一个国家认可的基础，用于测定砂轮、涂层磨料产品、一般抛光和其他一般工业用途（如压力喷砂、线锯、石板磨粒等）中所用磨料颗粒的磁性含量。

The purpose of UAMA B74.19-2016 is to establish a nationally recognized basis for determining the magnetic content of abrasive grain1) used in the manufacture of grinding wheels, coated abrasive products, general polishing, and other general industrial uses such as pressure blasting, wiresawing, lithoplate graining, etc.