ASTM B212-99(2006)
(Test Method)Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel
Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel
SIGNIFICANCE AND USE
This test method provides a guide for evaluation of the apparent density physical characteristic of powders. The density measured bears a relationship to the mass of powder that will fill a fixed volume press cavity when parts are being made. The degree of correlation between the results of this test and the quality of powders in use will vary with each particular application.
SCOPE
1.1 This test method describes a procedure for determining the apparent density of free-flowing metal powders and is suitable for only those powders that will flow unaided through the specified Hall flowmeter funnel.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:B212–99 (Reapproved 2006)
Standard Test Method for
Apparent Density of Free-Flowing Metal Powders Using the
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Hall Flowmeter Funnel
This standard is issued under the fixed designation B212; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope sity measured bears a relationship to the mass of powder that
will fill a fixed volume press cavity when parts are being made.
1.1 This test method describes a procedure for determining
The degree of correlation between the results of this test and
the apparent density of free-flowing metal powders and is
the quality of powders in use will vary with each particular
suitable for only those powders that will flow unaided through
application.
the specified Hall flowmeter funnel.
1.2 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
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6.1 Powder Flowmeter Funnel —A Hall flowmeter funnel
responsibility of the user of this standard to establish appro-
(Fig. 1) having a calibrated orifice.
priate safety and health practices and determine the applica-
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6.2 Density Cup —Acylindrical brass cup (Fig. 2) having a
bility of regulatory limitations prior to use.
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capacity of 25 cm .The actual cup volume shall be determined
2. Referenced Documents according to Test Method B873.
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6.3 Stand —A stand (Fig. 1) to support the Hall flowmeter
2.1 ASTM Standards:
funnel concentric with the density cup so that the bottom of the
B215 Practices for Sampling Metal Powders
Hall flowmeter funnel orifice is approximately 25 mm (1 in.)
B243 Terminology of Powder Metallurgy
above the top of the density cup when the apparatus is
B873 Test Method for Measuring Volume of Apparent
assembled as shown in Fig. 1.
Density Cup Used in Test Methods B 212, B 329, and B
6.4 Base—A level, vibration-free base to support the pow-
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der flowmeter.
3. Terminology 6.5 Balance, having a capacity of at least 200 g and a
sensitivity of 0.01 g.
3.1 Definitions—For definitions of terms used in this test
method, see Terminology B243.
7. Test Specimen
4. Summary of Test Method
7.1 The test specimen shall consist of a volume of approxi-
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mately 30 to 40 cm of metal powder obtained in accordance
4.1 Avolumeofpowderispermittedtoflowintoacontainer
with Practices B215.
of definite volume under controlled conditions. The mass of
7.2 The test specimen shall be tested as sampled. Note,
powder per unit volume is determined and reported as apparent
however, that temperature, moisture, oils, stearic acid, stear-
density, Hall.
ates, waxes, and so forth, may alter the characteristics of the
5. Significance and Use
powder.
5.1 This test method provides a guide for evaluation of the
8. Procedure
apparent density physical characteristic of powders. The den-
8.1 Weigh the empty density cup to the nearest 0.1 g or,
alternatively, place the empty density cup on the balance and
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This test method is under the jurisdiction of ASTM Committee B09 on Metal
tare the balance to zero.
Powders and Metal Powder Products and is the direct responsibility of Subcom-
mittee B09.02 on Base Metal Powders.
Current edition approved April 1, 2006. Published April 2006. Originally
approved in 1946. Last previous edition approved in 1999 as B212 – 99. DOI:
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10.1520/B0212-99R06. The sole source of supply of the apparatus known to the committee at this time
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or isAccu Powder International, LLC, 901 LehighAve., Union, NJ 07083-7632. If you
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM are aware of alternative suppliers, please provide this information to ASTM
Standards volume information, refer to the standard’s Document Summary page on International Headquarters. Your comments will receive careful consideration at a
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the ASTM website. meeting of the responsible technical committee, which you may attend.
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B212–99 (2006)
FIG. 1 Flowmeter Apparatus — Hall Funnel
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FIG. 2 Density Cup (25 6 0.03 cm )
8.2 Carefully load the test specimen into the flowmeter 8.4 Using a nonmagnetic spatula with the blade held per-
funnel and permit it to run into the density cup through the
pendicular to the top of the cup, level off the powder flush with
discharge orifice. Take care not to move the density cup.
the top of the density cup. Take care
...
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