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Significance and Use
5.1 This test method provides a guide for evaluation of an important physical characteristic of a powder known as the apparent density. The measured apparent density bears a relationship to the mass of powder that will fill a fixed volume die cavity. The degree of correlation between the results of this test and the performance of powders during use may vary with each particular application. Note, however, that the presence of moisture, oils, stearic acid, stearates, waxes, and the temperature of the powder mass may alter the physical characteristics of the powder.
1.1 This test method describes a procedure for determining the apparent density of free-flowing metal powders, and mixed powders; and is suitable for only those powders that will flow unaided through the specified Hall Flowmeter funnel.
1.2 With the exception of the values for mass, volume, and density, for which the use of the gram and the cubic centimeter units is the long-standing industry practice, the values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B215 Practices for Sampling Metal Powders
B243 Terminology of Powder Metallurgy
B873 Test Method for Measuring Volume of Apparent Density Cup Used in Test Methods B 212, B 329, and B 417
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ICS Number Code 77.160 (Powder metallurgy)
UNSPSC Code 31133700(Powdered metals and metal alloys)
ASTM B212-13, Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top