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ASTM A 976 Document Information:
Title
Standard Classification of Insulating Coatings for Electrical Steels by Composition, Relative Insulating Ability and Application
ASTM International
Publication Date:
Oct 1, 2003
Scope:
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.
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 A 345, A 677, A
683, A 726, A 840, and A 876. 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.
The values stated in customary (cgs-emu and inch-pound) units are to
be regarded as standard. The
values given in parentheses are mathematical conversions to SI units
which are provided for
information only and are not considered standard.
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.
Keywords:
- coating
- coreplate
- Franklin test
- insulation
- insulating coating
- interlaminar resistance
- steel
- surface insulation resistivity
- Two-Surface test
- varnish
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