ASTM_A_1036_-_04_2015.pdf

Designation:A103604(Reapproved 2015)Standard Guide forMeasuring Power Frequency Magnetic Properties of Flat-Rolled Electrical Steels Using Small Single Sheet Testers1This standard is issued under the fixed designation A1036;the number immediately following the designation indicates the year oforiginal adoption or,in the 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 guide covers procedures for interpreting the spe-cific core loss and peak permeability determined using smallsingle-sheet test systems.It is limited to single-sheet testsystems that require a test specimen or coupon be cut from thematerial being tested and are designed such that the entirewidth of that test specimen is magnetized during testing.1.2 This guide is primarily intended for measurements ofthe magnetic properties of flat-rolled electrical steels at fre-quencies of 50 Hz or 60 Hz under sinusoidal flux conditions.1.3 This guide includes procedures to provide correlationwith the 25-cm Epstein test method(Test Method A343/A343M).1.4 The range of magnetic flux densities is governed by theproperties of the test specimens and the instruments and testpower source.Nonoriented electrical steels may be tested atmagnetic flux densities up to about 16-kG 1.6T for core loss.The maximum magnetic field strength for peak permeabilitytesting is limited by the current carrying capacity of themagnetizing winding and the test power source.Single sheettesters are typically capable of testing at magnetic fieldstrengths up to 50 Oe 4000 A/m or more.1.5 Within this guide,a small single sheet tester(small SST)is defined as a magnetic tester designed to test flat,rectangularsheet-type specimens.Typical specimens for these testers aresquare(or nearly so).The design of the small SST test fixturemay be small enough to accommodate specimens about 5 by 5cm or may be large enough to accommodate specimens about36 by 36 cm.Specimens for a particular SST must beappropriate for the particular test fixture.1.6 This guide covers two alternative test methods:Method1 and Method 2.1.6.1 Method 1 is an extension of Method 1 of Test MethodA804/A804M,which describes a test fixture having twowindings that encircle the test specimen and two low-reluctance,low-core loss ferromagnetic yokes that serve as fluxreturn paths.The dimensions of the test fixture for Method 1are not fixed but rather may be designed and built for anynominal specimen dimension within the limits given in 1.5.The power loss in this case is determined by measuring theaverage value of the product of primary current and inducedsecondary voltage.1.6.2 Method 2 covers the use of a small single sheet tester,which employs a magnetizing winding,a magnetic flux sensingwinding,and a magnetic field strength detector.The power lossin this case is determined by measuring the average value ofthe product of induced secondary voltage and magnetic fieldstrength.1.6.3 The calibration method described in the annex of thisguide applies to both test methods.1.7 The values and equations stated in customary(cgs-emuand inch-pound)or SI units are to be regarded separately asstandard.Within this standard,SI units are shown in brackets.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with this standard.1.8 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 and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2A340 Terminology of Symbols and Definitions Relating toMagnetic TestingA343/A343M Test Method for Alternating-Current Mag-netic Properties of Materials at Power Frequencies UsingWattmeter-Ammeter-Voltmeter Method and 25-cm Ep-stein Test FrameA677 Specification for Nonoriented Electrical Steel FullyProcessed Types1This guide is under the jurisdiction of ASTM Committee A06 on MagneticProperties and is the direct responsibility of Subcommittee A06.01 on Test Methods.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 2004.Last previous edition approved in 2009 as A103604(2009).DOI:10.1520/A1036-04R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 A683/A683M Specification for Nonoriented Electrical Steel,Semiprocessed TypesA726 Specification for Cold-Rolled Magnetic LaminationQuality Steel,Semiprocessed