Standard Active Last Updated: May 24, 2022
ASTM D1676-17

Standard Test Methods for Film-Insulated Magnet Wire

Standard Test Methods for Film-Insulated Magnet Wire
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Significance and Use

7.1 Bond strength values obtained by flexural tests provide information with regard to the bond strength of a particular self-bonding outer coating in combination with a particular round film-insulated magnet wire when measured under conditions described in this test method.


1.1 These test methods cover procedures for testing film-insulated magnet wire that is used in electrical apparatus. These test methods are intended primarily for the evaluation of the electrical insulating materials used. The intent is that these test methods be used, except where modified, by individual specifications for particular applications.

1.2 These test methods present different procedures for evaluating given properties of round, rectangular or square, copper or aluminum film-insulated magnet wire.

1.3 The values stated in inch-pound units are the standard. The SI units in parentheses are provided for information only.

1.4 The test methods appear in the following sections:



Bond Strength

4 – 12

Burnout (AC Overload Resistance)

13 – 21

Chemical Resistance

22 – 28

Coefficient of Friction

29 – 37

Continuity, DC High Voltage

38 – 45

Continuity, DC Low Voltage

46 – 53

Completeness of Cure

54 – 60

Cut-Through Temperature (Thermoplastic Flow)

61 – 68

Dielectric Breakdown AC Voltage

69 – 75

Dielectric Breakdown AC Voltage after Bending

76 – 82

Dielectric Breakdown AC Voltage at Elevated Temperatures

83 – 89

Dielectric Breakdown AC Voltage after Conditioning in Refrigerant Atmosphere

90 – 99

Dimensional Measurement

100 – 106

Dissipation Factor Measurement

107 – 114

Electrical Resistance

115 – 121


122 – 129

Extractables, Refrigerant

130 – 140

Film Adherence and Flexibility

141 – 148



 a) Elastic Ratio


 b) Low Stress Elongation


 c) Spring Back


Heat Shock

156 – 162


163 – 169

Scrape Resistance, Unidirectional

170 – 177


178 – 185

Resistance to Insulating Liquids and Hydrolytic Stability

186 – 195

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. Specific hazard statements are given in 9.5, 19.1, 19.3, 19.8, 52.1, 58, 59.1, 74.1, 112.1, 135.4, and 182.3.

Note 1: This test method is related to IEC 60851. Since both methods contain multiple test procedures, many procedures are technically equivalent while others differ significantly.

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 Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Book of Standards Volume: 10.01
Developed by Subcommittee: D09.12
Pages: 36
DOI: 10.1520/D1676-17
ICS Code: 29.060.10