ASTM C401 - 12

    Standard Classification of Alumina and Alumina-Silicate Castable Refractories

    Active Standard ASTM C401 | Developed by Subcommittee: C08.92

    Book of Standards Volume: 15.01


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    Significance and Use

    Alumina and alumina-silicate castable refractories are produced to yield property characteristics commensurate with different end use properties. Volume stability, modulus of rupture, bulk density, and lime content have become useful measures to distinguish various alumina and alumina-silicate castable formulations for initial fitness for service. This classification is considered useful for purchase specifications and for quality control.

    1. Scope

    1.1 This classification covers alumina and alumina-silicate castable refractories that, when tempered with water, will develop structural strength by chemical action.

    1.2 This standard does not purport to address 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

    C113 Test Method for Reheat Change of Refractory Brick

    C133 Test Methods for Cold Crushing Strength and Modulus of Rupture of Refractories

    C134 Test Methods for Size, Dimensional Measurements, and Bulk Density of Refractory Brick and Insulating Firebrick

    C862 Practice for Preparing Refractory Concrete Specimens by Casting

    C865 Practice for Firing Refractory Concrete Specimens


    ICS Code

    ICS Number Code 81.080 (Refractories)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/C0401-12

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