ASTM International - ASTM B922-20

Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption

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Organization: ASTM International
Publication Date: 1 May 2020
Status: active
Page Count: 5
ICS Code (Powder metallurgy): 77.160
significance And Use:

5.1 Both suppliers and users of metals can benefit from knowledge of the surface area of these materials. Results of many intermediate and final processing steps are controlled by, or related to,... View More

scope:

1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The method provides specific sample outgassing procedures for listed materials. It includes additional general outgassing instructions for other metals. The multipoint equation of Brunauer, Emmett, and Teller (BET),2 along with the single point approximation of the BET equation, forms the basis for all calculations.

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

1.3 Units-The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3.1 State all numerical values in terms of SI units unless specific instrumentation software reports surface area using alternate units. In this case, present both reported and equivalent SI units in the final written report. Many instruments report surface area as m2/g, instead of using correct SI units (m2/kg).

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.

Document History

ASTM B922-20
May 1, 2020
Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The...
January 1, 2017
Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The...
May 1, 2010
Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The...
April 1, 2008
Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The...
October 10, 2002
Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The...
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