ASTM B276 - 05(2015)

    Standard Test Method for Apparent Porosity in Cemented Carbides

    Active Standard ASTM B276 | Developed by Subcommittee: B09.06

    Book of Standards Volume: 02.05

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    Significance and Use

    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.

    1. Scope

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

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B243 Terminology of Powder Metallurgy

    B665 Guide for Metallographic Sample Preparation of Cemented Tungsten Carbides

    ICS Code

    ICS Number Code 77.160 (Powder metallurgy)

    UNSPSC Code

    UNSPSC Code 31133703(Cemented carbide powdered metal and metal alloy)

    Referencing This Standard
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    DOI: 10.1520/B0276-05R15

    Citation Format

    ASTM B276-05(2015), Standard Test Method for Apparent Porosity in Cemented Carbides, ASTM International, West Conshohocken, PA, 2015,

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