Recent changes in technology are covered in ASTM B330, Test Methods for Estimating Average Particle Size of Metal Powders and Related Compounds Using Air Permeability. Metal powders tested by ASTM B330 are used in large and small precision parts in the automotive industry, as well as in various types of machinery and lighting products. New instrument referred to in standard is more precise, using sensitive pressure transducers instead of eyeball-estimated water column height to measure ...This story is related to the following:Trade Associations