ASTM C545 - 97(2013)

    Standard Classification of Zircon Refractories

    Active Standard ASTM C545 | Developed by Subcommittee: C08.92

    Book of Standards Volume: 15.01


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    Significance and Use

    3.1 The zircon content and bulk density of a zirconia-silica refractory material have important influences on chemical resistance and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality control.

    1. Scope

    1.1 This classification covers fired refractory brick and shapes consisting predominantly of zircon (ZrO2·SiO 2) and containing, by chemical analysis, not less than 60 % zirconium oxide (ZrO2) and not less than 30 % silica (SiO 2).

    1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.


    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

    C20 Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water

    C830 Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes by Vacuum Pressure


    ICS Code

    ICS Number Code 81.080 (Refractories)

    UNSPSC Code

    UNSPSC Code 31371100(Refractory bricks)


    DOI: 10.1520/C0545

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