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ASTM B923-23

Current Revision

Standard Test Method for Metal Powder Skeletal Density by Helium or Nitrogen Pycnometry

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1.1 This test method covers determination of skeletal density of metal powders. The test method specifies general procedures that are applicable to many commercial pycnometry instruments. The method provides specific sample outgassing procedures for listed materials. It includes additional general outgassing instructions for other metals. The ideal gas law forms the basis for all calculations.

1.2 This test method does not include all existing procedures appropriate for outgassing metal materials. The included procedures provided acceptable results for samples analyzed during an interlaboratory study. The investigator shall determine the appropriateness of listed procedures.

1.3 Units—With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm3) and gram (g) units is the longstanding industry practice, the values in SI units are to be regarded as standard.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 Both suppliers and users of metals can benefit from knowledge of the skeletal density of these materials. Results of many intermediate and final processing steps are controlled by or related to skeletal density of the metal. In addition, the performance of many sintered or cast metal structures may be predicted from the skeletal density of the starting metal powder, for all or a portion of the finished piece.

SDO ASTM: ASTM International
Document Number B923
Publication Date Nov. 15, 2023
Language en - English
Page Count 4
Revision Level 23
Supercedes
Committee B09.03
Publish Date Document Id Type View
Nov. 15, 2023 B0923-23 Revision
April 1, 2022 B0923-22 Revision
June 1, 2021 B0923-21 Revision
May 1, 2020 B0923-20 Revision
Oct. 1, 2016 B0923-16 Revision
May 1, 2010 B0923-10 Revision
Oct. 10, 2002 B0923-02 Revision
April 1, 2008 B0923-02R08 Reaffirmation