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ASTM B527-06

(Test Method)

Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds

Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds

SIGNIFICANCE AND USE
This test method covers the evaluation of the tapped density physical characteristic of metallic powders and compounds. The degree of correlation between the results of this test method and the quality of powders in use will vary with each particular application and has not been fully determined.
SCOPE
1.1 This test method specifies a method for the determination of tap density (packed density) of metallic powders and compounds, that is, the density of a powder that has been tapped, to settle contents, in a container under specified conditions.
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.

General Information

Status
Historical
Publication Date
30-Sep-2006
ICS
77.160 - Powder metallurgy
Technical Committee
B09 - Metal Powders and Metal Powder Products
Drafting Committee
B09.03 - Refractory Metal Powders
Current Stage
Ref Project

Relations

Replaces
ASTM B527-93(2000)e1 - Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds
Effective Date
01-Oct-2006
Replaced By
ASTM B527-14 - Standard Test Method for Determination of Tap Density of Metal Powders and Compounds
Effective Date
01-Apr-2014
Referred By
ASTM B943-16(2022) - Standard Specification for Zinc and Tin Alloy Wire Used in Thermal Spraying for Electronic Applications
Effective Date
01-Oct-2006
Referred By
ASTM F3049-14(2021) - Standard Guide for Characterizing Properties of Metal Powders Used for Additive Manufacturing Processes
Effective Date
01-Oct-2006
Referred By
ASTM D7481-18 - Standard Test Methods for Determining Loose and Tapped Bulk Densities of Powders using a Graduated Cylinder
Effective Date
01-Oct-2006
Referred By
ASTM C750-18 - Standard Specification for Nuclear-Grade Boron Carbide Powder
Effective Date
01-Oct-2006
Referred By
ASTM C1770-21 - Standard Test Method for Determination of Loose and Tapped Bulk Densities of Small Quantities of Plutonium Oxide
Effective Date
01-Oct-2006

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ASTM B527-06 - Standard Test Method for Determination of Tap Density of Metallic Powders and CompoundsASTM B527-06 - Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds
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ASTM B527-06 - Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B527 − 06
StandardTest Method for
Determination of Tap Density of Metallic Powders and
1
Compounds
This standard is issued under the fixed designation B527; 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.
1. Scope* 4.2.1 Alternatively, the following may be used:
4.2.1.1 Graduated Glass Cylinder, calibrated to contain 25
1.1 This test method specifies a method for the determina-
3
cm at 20°C, the height of the graduated portion being approxi-
tion of tap density (packed density) of metallic powders and
3
mately 135 mm. The graduations shall be at 0.2 cm intervals.
compounds, that is, the density of a powder that has been
3
4.2.1.2 A 25-cm cylinder shall be used for powders of
tapped, to settle contents, in a container under specified
3
apparent density higher than 4 g/cm , in particular for refrac-
conditions.
tory metal powders, but may also be used for powder of lower
1.2 This standard does not purport to address all of the
apparent density.
safety concerns, if any, associated with its use. It is the
4.3 Tapping Apparatus, which permits the tapping of the
responsibility of the user of this standard to establish appro-
graduated cylinder against a firm base. The tapping shall be
priate safety and health practices and determine the applica-
such that a densification of the powder can take place without
bility of regulatory limitations prior to use.
any loosening of its surface layers. The stroke shall be 3 mm
2. Referenced Documents (0.118 in.) and the tapping frequency shall be between 100 and
2 300 taps/min. An example of a tapping apparatus is shown in
2.1 ASTM Standards:
Fig. 1.
B215 Practices for Sampling Metal Powders
5. Test Specimen
3. Significance and Use
5.1 For the quantities of powder required for each test, see
3.1 This test method covers the evaluation of the tapped
Table 1. Obtain test powder samples according to Practices
density physical characteristic of metallic powders and com-
B215.
pounds. The degree of correlation between the results of this
5.2 In general, the powder should be tested in the as-
test method and the quality of powders in use will vary with
received condition. In certain instances the powder may be
each particular application and has not been fully determined.
dried. However, if the powder is susceptible to oxidation, the
4. Apparatus drying shall take place in a vacuum or in inert gas. If the
powder contains volatile substances, it shall not be dried.
4.1 Balance, of appropriate capacity and accuracy to satisfy
the requirements shown in Table 1. 5.3 The test shall be carried out on three test samples, if
possible.
4.2 Graduated Glass Cylinder, calibrated to contain 100
3
cm at 20°C, the height of the graduated portion being
6. Procedure
3
approximately 175 mm. The graduations shall be at 1 cm
6.1 Clean the inside wall of the graduated cylinder (see 4.2)
3
intervals,thusallowingameasuringaccuracyof 60.5cm .For
with a suitable clean brush or, if necessary, by rinsing with a
3 3
apparent densities over 4 g/cm , do not use the 100 cm
solvent, such as acetone. If a solvent is used, thoroughly dry
cylinder.
the cylinder before reuse.
6.2 Weigh, to the nearest 0.1 g, the mass of the test portion
1
This specification is under the jurisdiction of ASTM Committee B09 on Metal
as indicated in Table 1, using a balance (see 4.1).
Powders and Metal Powder Productsand is the direct responsibility of Subcommit-
tee B09.03 on Refractory Metal Powders.
6.3 Pour the test portion into the graduated cylinder. Take
Current edition approved Oct. 1, 2006. Published October 2006. Originally
care that a level surface of the powder is formed. Place the
ε1
approved in 1970. Last previous edition approved in 2000 as B527 – 93 (2000) .
cylinder in the tapping apparatus (see 4.3). Tap the cylinder
DOI: 10.1520/B0527-06.
2
until no further decrease in the volume of the powder takes
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
place (see Note 1).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 1—In practice, the minimum number of taps, N, such that no
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B527 − 06
TABLE 1 Accuracy and Capacity of Balance further change in volume takes place would be determined. For all further
3 3 tests on the same t
...

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