ASTM D 229:2026

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 They are generally used as terminal boards, spacers, voltage barriers, and circuit boards. 1.2 Use Test Methods D619 (withdrawn) or Specification D710 for tests applying to vulcanized fibre. 1.3 Some of the test methods contained in this standard are similar to those contained in IEC 60893-2, which applies to rigid industrial laminated sheets based on thermosetting resins for electrical purposes. 1.4 The test methods appear in the following sections: Test Sections ASTM Test Method Acetone extractable matter 69 to 70 D494 Arc resistance 47 D495 Ash 56 to 60 ... Bonding strength 49 to 54 ... Flammability methods I and II 61 D8647 Coefficient of linear thermal expansion 63 D696 Compressive strength 25 D695 Conditioning 4 D6054 Dissipation factor 34 to 40 D669 Dielectric strength 28 to 33 D149 Expansion (linear thermal) 62 D696 Flexural properties 12 to 24 D790 Hardness (Rockwell) 55 D785 Insulation resistance and resistivity 41 to 46 D257 Permittivity 34 to 40 D150 Resistance to impact 26 D256 Tensile properties 7 to 11 D638 Thickness 5 to 6 D374/D374M Tracking resistance 48 D2132 Warp or twist 63 to 68 ... Water absorption 27 D570 1.5 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. 1.6 The two fire test methods formerly included in these test methods have been converted into Test Methods D8647 , without technical changes. 1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 31.1 . 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

29.035.01