ASTM C374 - 14

    Standard Test Methods for Fusion Flow of Porcelain Enamel Frits (Flow-Button Methods)

    Active Standard ASTM C374 | Developed by Subcommittee: B08.12

    Book of Standards Volume: 02.05


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    Abstract

    These test methods cover evaluation of the relative fusion flow characteristics of samples of a given porcelain enamel by comparison with an established standard for that frit. Two test methods are included, differing only in certain details of the samples and in the apparatus and procedure for preparation of test specimens. Both test methods give equally reproducible results and provide a satisfactory basis for comparison of fusion flow of the sample with that of the established standard. Test Method A employs granular particles of frit to which a bonding agent has been added. Button specimens are formed under high pressure in a hydraulic press. Test Method B employs crushed, sized particles of frit to which a bonding agent has been added. Button specimens are formed in a steel mold by hand. Both Test Methods use a hard steel mortar that is resistant to abrasion by the porcelain enamel frit, a hydraulic press, and a fusion flow rack. The test methods use sieves of different specifications. The steel mold assembly of both test methods consists of a die and plunger, however, Test Method B has an additional back-up disk.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 These test methods cover evaluation of the relative fusion flow characteristics of samples of a given porcelain enamel frit by comparison with an established standard for that frit.

    1.2 Two test methods are included, differing only in certain details of the samples and in the apparatus and procedure for preparation of test specimens. Both test methods give equally reproducible results and provide a satisfactory basis for comparison of fusion flow of the sample with that of the established standard.

    1.2.1 Test Method A employs granular particles of frit to which a bonding agent has been added. Button specimens are formed under high pressure in a hydraulic press.

    1.2.2 Test Method B employs crushed, sized particles of frit to which a bonding agent has been added. Button specimens are formed in a steel mold by hand.

    1.3 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.

    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 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

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves


    ICS Code

    ICS Number Code 25.220.50 (Enamels)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/C0374-14

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