Standard Historical Last Updated: Nov 18, 2013 Track Document
ASTM D229-09b

Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation

Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation D0229-09B ASTM|D0229-09B|en-US Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation Standard new BOS Vol. 10.01 Committee D09
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Significance and Use

This test method provides useful engineering information for evaluating the mechanical behavior of rigid electrical insulation at elevated temperature. When the proper exposure and test temperatures are chosen, depending on the material and end-use operating temperature, use the test method as one means of indicating relative thermal degradation of rigid insulating materials.


1.1 These test methods cover procedures for testing rigid electrical insulation normally manufactured in flat sheet or plate form. They are generally used as terminal boards, spacers, voltage barriers, and circuit boards.

Note 1—For tests applying to vulcanized fibre reference needs to be made to Test Methods D619.

Note 2—This standard resembles IEC 60893-2, Specification for Rigid Industrial Laminated Sheets Based On Thermosetting Resins for Electrical Purpose, Methods of Tests.

1.2 The test methods appear in the following sections:

Acetone extractable matter83 to 84D494
Arc resistance47 D495
Ash56 to 60 ...
Bonding strength49 to 54...
Burning rate and flame resistance61 to 75...
Compressive strength25 D695
Conditioning 4 D6054
Dissipation factor34 to 40D669
Dielectric strength28 to 33D149
Expansion (linear thermal)76D696
Flexural properties12 to 24D790
Hardness (Rockwell)55 D785
Insulation resistance and resistivity41 to 46D257
Permittivity34 to 40D150
Resistance to impact26 D256
Tensile properties 7 to 11D638
Thickness 5 to 6D374
Tracking resistance48 D2132
Warp or twist77 to 82...
Water absorption27 D570

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 is a fire-test-response standard. See Sections 61 through 75, which are the procedures for burning rate and flame resistance.

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. Specific precautionary statements are given in 31.1 and 1.6.

1.6 This standard measures and describes the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.

1.7 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.

17.1 This test method covers the determination of flexural properties at elevated temperature, and as a function of time of exposure to elevated temperature.

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Book of Standards Volume: 10.01
Developed by Subcommittee: D09.07
Pages: 18
DOI: 10.1520/D0229-09B
ICS Code: 29.035.01