scope:

This standard describes a method for measuring the density of powder metallurgy products having inter-connected porosity by weighing the piece first in air, second in water and then calculating the density. It is applicable to both green specimens and sintered parts. The density of PIM products is expressed in grams per cubic centimeter.

A test method is being developed for products that contain less than 2% porosity.

Green Density, (p_g), is the mass per unit volume of an unsintered P/M part or test specimen. Normally the green density is determined on P/M parts for quality control tests and for determining the compressibility of powders and mixes.

Dry Density, (p_s), is the mass per unit volume of asintered, non-oil-impregnated P/M part.

Wet Density, (p_i), is the mass per unit volume of asintered P/M part impregnated with oil or other non-metallic lubricant. Normally the density of sintered bearings are reported in this way since they are supplied and used fully oil-impregnated.

This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the potential safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.