Standard Historical Last Updated: Aug 16, 2017
ASTM D229-96

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


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 should be made to Test Methods D 619.

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 matter 83 to 84D 494
Arc resistance47 D 495
Ash56 to 60 ...
Bonding strength49 to 54...
Burning rate and flame resistance61 to 75...
Compressive strength25 D 695
Conditioning4 D 6054
Dissipation factor34 to 40D 669
Dielectric strength28 to 33D 149
Expansion (linear thermal)76D 696
Flexural properties12 to 24D 790
Hardness (Rockwell)55 D 785
Insulation resistance and resistivity41 to 46D 257
Permittivity34 to 40D 150
Resistance to impact26 D 256
Tensile properties7 to 11D 638
Thickness5 to 6D 374
Tracking resistance48 D 2132
Warp or twist77 to 82...
Water absorption27 D 570

1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units given in these test methods may be approximate.

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 61.5.

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Book of Standards Volume: 10.01
Developed by Subcommittee: D09.07
Pages: 16
DOI: 10.1520/D0229-96
ICS Code: 29.035.01