ASTM D1039 : 16(2022)

Standard Test Methods for Glass-Bonded Mica Used as Electrical Insulation

Standard Details

1.1 These test methods cover the evaluation of the characteristics of glass-bonded, natural, or synthetic mica materials intended for use as electrical insulation.

1.2 Glass bonded mica materials are commercially available in both injection molded and compression molded types. These test methods are applicable to both types except for tensile strength methods. (See Section 41.)

1.3 The test methods appear in the following sections:

Test Method	Section	ASTM Test Method
Arc Resistance	57 – 59	D495
Compressive Strength	33 – 35	D695
Conditioning	5	D618
Dielectric Strength	48 – 51	D149
Dissipation Factor	43 – 47	D150 and D2149
Heat Distortion Temperature	24 – 29	D648
Impact Resistance	36 – 39	D256
Modulus of Rupture	30 – 32	D790 and C674
Permittivity	43 – 47	D150 and D2149
Porosity	13 – 16	D116
Resistivity, Volume and Surface	52 – 56	D257
Rockwell Hardness	10 – 12	D785
Specific Gravity	6 – 9	D792
Specimens	4
Tensile Strength	40 – 42	D638 and D651
Terminology	3	D1711
Thermal Conductivity	17 – 19	C177 and E1225
Thermal Expansion	20 – 23	E228 and E289
Thickness	49 and 54	D374

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See also Sections 45, 49, 54, and 58.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International StandardDetails, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.