ASTM A976
Scope
1.1 This document classifies insulating coatings for electrical steels according to their composition, relative insulating ability, and functionality. The
purpose of this classification is to assist users of insulating coatings by providing general information about the chemical nature and use of the coatings, as well as to provide important data
concerning limits to their use, that is, relative insulating ability, punchability, temperature stability, weldability, and fabricability. Specific surface insulation resistivity values for
each coating are not included in this classification. The user is referred to the flat-rolled electrical steel specifications noted in 1.2 should more
detailed information concerning surface insulation resistivity values be required.
1.2 This classification is to be used in conjunction with the various specifications for flat-rolled electrical steels under the jurisdiction of Committee
A06, including Specifications A345, A677, A683, A726, A840, A876, and A1086. However, in those
instances in which the coating descriptions and characteristics differ between this classification and any of the specifications, this classification shall supersede the specification.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and
inch-pound) units which are provided for information only and are not considered standard.
1.4 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.
1.5 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.
Keywords
coatings; coreplate; Franklin test; insulation; insulating coatings; interlaminar resistance; steels; surface insulation resistivity; Two–Surface test; varnishes;
ICS Code
ICS Number Code 01.040.25 (Manufacturing engineering (Vocabularies))
DOI: 10.1520/A0976-18