ASTM D2240-00

    Standard Test Method for Rubber Property—Durometer Hardness


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    1. Scope

    1.1 This test method describes eight types of rubber hardness measurement devices known as durometers: types A, B, C, D, DO, O, OO and M. The procedure for determining indentation hardness of substances classified as thermoplastic elastomers, vulcanized (thermoset) rubber, elastomeric materials, cellular materials, and some plastics is also described.

    1.2 This test method is not equivalent to other indentation hardness methods and instrument types, specifically those described in Test Method D 1415.

    1.3 This test method is not applicable to the testing of coated fabrics.

    1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. Many of the stated dimensions in SI are direct conversions from the U. S. Customary System to accommodate the instrumentation, practices and procedures that existed prior to the Metric Conversion Act of 1975.

    1.5 All materials, instruments, or equipment used for the determination of mass, force or dimension shall have traceability to the National Institute for Standards and Technology, or other internationally recognized organization parallel in nature.

    1.6 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

    D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M

    D618 Practice for Conditioning Plastics for Testing

    D785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials

    D1349 Practice for Rubber--Standard Conditions for Testing

    D1415 Test Method for Rubber Property--International Hardness

    D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries

    F1957 Test Method for Composite Foam Hardness-Durometer Hardness

    ISO Standard

    ISO/IEC17025: 1999 General Requirements for the Competence of Testing and Calibration Laboratories


    ICS Code

    ICS Number Code 83.060 (Rubber)

    UNSPSC Code

    UNSPSC Code 41114611(Hardness testers)


    Referencing This Standard
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    DOI: 10.1520/D2240-00

    Citation Format

    ASTM D2240-00, Standard Test Method for Rubber Property—Durometer Hardness, ASTM International, West Conshohocken, PA, 2002, www.astm.org

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