1、Designation:A97613Standard Classification ofInsulating Coatings for Electrical Steels by Composition,Relative Insulating Ability and Application1This standard is issued under the fixed designation A976;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This document classifies insulating coatings for electri-cal steels according to their composi
3、tion,relative insulatingability,and functionality.The purpose of this classification is toassist users of insulating coatings by providing general infor-mation about the chemical nature and use of the coatings,aswell as to provide important data concerning limits to their use,that is,relative insula
4、ting ability,punchability,temperaturestability,weldability,and fabricability.Specific surface insula-tion resistivity values for each coating are not included in thisclassification.The user is referred to the flat-rolled electricalsteel specifications noted in 1.2 should more detailed informa-tion c
5、oncerning surface insulation resistivity values be re-quired.1.2 This classification is to be used in conjunction with thevarious specifications for flat-rolled electrical steels under thejurisdiction of Committee A06,including Specifications A345,A677,A683,A726,A840,and A876.However,in thoseinstanc
6、es in which the coating descriptions and characteristicsdiffer between this classification and any of the specifications,this classification shall supersede the specification.1.3 The values stated in customary(cgs-emu and inch-pound)units are to be regarded as standard.The values givenin parentheses
7、 are mathematical conversions to SI units whichare provided for information only and are not consideredstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety
8、 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A340 Terminology of Symbols and Definitions Relating toMagnetic TestingA345 Specification for Flat-Rolled Electrical Steels forMagnetic ApplicationsA677 Specificati
9、on for Nonoriented Electrical Steel FullyProcessed TypesA683 Specification for Nonoriented Electrical Steel,Semi-processed TypesA717/A717M Test Method for Surface Insulation Resistivityof Single-Strip SpecimensA726 Specification for Cold-Rolled Magnetic LaminationQuality Steel,Semiprocessed TypesA84
10、0 Specification for Fully Processed Magnetic Lamina-tion Steel(Withdrawn 2011)3A876 Specification for Flat-Rolled,Grain-Oriented,Silicon-Iron,Electrical Steel,Fully Processed TypesA937/A937M Test Method for Determining InterlaminarResistance of Insulating Coatings Using Two AdjacentTest Surfaces3.Te
11、rminology3.1 Definitions of Terms Specific to This Standard:3.1.1 interlaminar resistance,nthe average resistance oftwo adjacent insulating surfaces in contact with each other,inaccordance with Test Method A937/A937M.3.1.2 stress-relief anneal,nheat treatment that improvesthe magnetic properties of
12、electrical steel by relieving internalstresses which are introduced during fabrication of magneticcores.1This classification is under the jurisdiction of ASTM CommitteeA06 onMagnetic Properties and is the direct responsibility of SubcommitteeA06.02 onMaterial Specifications.Current edition approved
13、Nov.1,2013.Published November 2013.Originallypublished in 1997.Last previous edition approved in 2008 as A976 03(2008).DOI:10.1520/A0976-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume in
14、formation,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.3 surface insulation resisti
15、vity,n the effective resistiv-ity of a single insulating layer tested between applied baremetal contacts and the base metal of the insulated testspecimen,in accordance with Test Method A717/A717M.3.2 Definitions for other terms and symbols used in thisspecification are defined in Terminology A340.4.
16、Significance and Use4.1 This classification establishes categories of insulatingcoatings based on their chemical nature,relative insulatingability,and typical applications.These categories describegeneral physical and chemical characteristics of the coatingsthat are useful in making broad estimates of their insulatingability and suitability for various applications.5.Basis of Classification5.1The insulating coatings are categorized according togeneral composition,relative insulating ability,and