ASTM D349 - 13

    Standard Test Methods for Laminated Round Rods Used for Electrical Insulation

    Active Standard ASTM D349 | Developed by Subcommittee: D09.07

    Book of Standards Volume: 10.01

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    Significance and Use

    7.1 This test method is designed to provide data for the control and specification of materials and for characterization purposes in research and development of new materials. It is possible that the tensile properties will vary with the size of specimens and the speed of testing. Consequently, these factors along with others noted herein must be controlled where precise comparative results are desired.

    1. Scope

    1.1 These test methods cover the procedures for testing rigid round rods used in electrical insulation. These round rods include many types made from fibrous sheets of basic materials, such as cellulose, glass, or nylon in the form of paper, woven fabrics, or mats, bonded together by natural or synthetic resins, or by adhesives. Such round rods include vulcanized fiber and thermosetting laminates as well as round rods made from cast, molded, or extruded natural or synthetic resins, with or without fillers or reinforcing materials.

    1.2 The procedures appear in the following sections:



    Compressive strength (axial)

    20 – 25


    28 – 30

    Dielectric strength

    31 – 39

    Flexural strength

    13 – 19

    Tensile strength

     7 – 12

    Water absorption


    1.3 The values stated in inch-pound units are to be regarded as the 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. For a specific warning statement see 36.2.

    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

    D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

    D570 Test Method for Water Absorption of Plastics

    D668 Test Methods of Measuring Dimensions of Rigid Rods and Tubes Used for Electrical Insulation

    D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

    D1711 Terminology Relating to Electrical Insulation

    D6054 Practice for Conditioning Electrical Insulating Materials for Testing

    ICS Code

    ICS Number Code 29.035.99 (Other insulating materials)

    UNSPSC Code

    UNSPSC Code 39121727(Electrical insulator rod)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D0349-13

    Citation Format

    ASTM D349-13, Standard Test Methods for Laminated Round Rods Used for Electrical Insulation, ASTM International, West Conshohocken, PA, 2013,

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