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ASTM B276-21

Current Revision

Standard Test Method for Apparent Porosity in Cemented Carbides

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1.1 This test method specifies procedures for the metallographic determination of apparent porosity in cemented carbides.

Note 1: The term “apparent porosity” is construed to mean all microstructures observed on a properly prepared, unetched surface, including structures resulting from uncombined carbon, non-metallic inclusions, etc., as well as true, inherent porosity.

1.2 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.

1.3 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.


4.1 Cemented carbide materials may contain small voids that, depending on the application, may affect the performance of the product. To assist users in specifying the maximum acceptable level of porosity, this test method illustrates a broad range of porosity levels for each of three porosity types. This test method is not intended to be used as a specification, but the levels shown here may be cited in specifications written by producers and users of cemented carbides.

SDO ASTM: ASTM International
Document Number B276
Publication Date Sept. 1, 2021
Language en - English
Page Count 19
Revision Level 21
Supercedes
Committee B09.06
Publish Date Document Id Type View
Sept. 1, 2021 B0276-21 Revision
Dec. 1, 2005 B0276-05E01 Revision
Dec. 1, 2005 B0276-05 Revision
Oct. 1, 2015 B0276-05R15 Reaffirmation
Sept. 1, 2010 B0276-05R10 Reaffirmation
Jan. 1, 2000 B0276-91R00 Reaffirmation
Jan. 1, 2000 B0276-91R96E01 Reaffirmation