Standard Test Method 32: Methods for Estimating Average Particle Size of Metal Powders Using Air Permeability PDF

This standard describes methods for determining the average particle size of a sample of fine metal powders using air permeability of a packed powder bed. This method is not generally used for mixed powders. The values obtained may not be absolute, but are reproducible, and are highly useful on a relative basis for control purposes. This is an excerpt from Standard Test Methods for Metal Powders and Powder Metallurgy Products, 2022 Edition, with ISBN 9781943694310.