ASTM D1525 - 09

    Standard Test Method for Vicat Softening Temperature of Plastics

    Active Standard ASTM D1525 | Developed by Subcommittee: D20.30

    Book of Standards Volume: 08.01


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    Significance and Use

    Data obtained by this test method is used to compare the heat-softening qualities of thermoplastic materials.

    This test method is useful in the areas of quality control, development, and characterization of plastic materials.

    1. Scope

    1.1 This test method covers determination of the temperature at which a specified needle penetration occurs when specimens are subjected to specified controlled test conditions.

    1.2 This test method is not recommended for ethyl cellulose, nonrigid poly(vinyl chloride), poly(vinylidene chloride), or other materials having a wide Vicat softening range.

    1.3 The values stated in SI units are to be regarded as standard.

    1.4 Due to the potential safety and environmental hazards associated with mercury-filled thermometers, the use of alternative temperature measuring devices (such as thermocouples and RTDs) is encouraged.

    1.5 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.

    Note 1—This test method is equivalent to ISO 306 in all sections with the exceptions of the allowance for creep, prior to the beginning of the test and the allowance of the fluidized powder as a heat transfer medium.


    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

    D618 Practice for Conditioning Plastics for Testing

    D883 Terminology Relating to Plastics

    D1898 Practice for Sampling of Plastics

    E1 Specification for ASTM Liquid-in-Glass Thermometers

    E77 Test Method for Inspection and Verification of Thermometers

    E608/E608M Specification for Mineral-Insulated, Metal-Sheathed Base Metal Thermocouples

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1137/E1137M Specification for Industrial Platinum Resistance Thermometers

    ISO Standards

    ISO306 Plastics--Thermoplastic Material--Determination of Vicat Softening Temperature


    ICS Code

    ICS Number Code 83.080.01 (Plastics in general)

    UNSPSC Code

    UNSPSC Code 13100000(Rubber and elastomers)


    DOI: 10.1520/D1525-09

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