ASTM_A_596_-_A_596M_-_14.pdf

Designation:A596/A596M14Standard Test Method forDirect-Current Magnetic Properties of Materials Using theBallistic Method and Ring Specimens1This standard is issued under the fixed designation A596/A596M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers dc ballistic testing for thedetermination of basic magnetic properties of materials in theform of ring,toroidal,link,double-lapped Epstein cores,orother standard shapes which may be cut,stamped,machined,or ground from cast,compacted,sintered,forged,or rolledmaterials.It includes tests for normal induction and hysteresistaken under conditions of steep wavefront reversals of thedirect-current magnetic field strength.1.2 This test method shall be used in conjunction withPractice A34/A34M.1.3 This test method is suitable for a testing range from verylow magnetic field strength up to 200 or more Oe 15.9 or morekA/m.The lower limit is determined by integrator sensitivityand the upper limit by heat generation in the magnetizingwinding.Special techniques and short duration testing mayextend the upper limit of magnetic field strength.1.4 Testing under this test method is inherently more accu-rate than other methods.When specified dimensional or shaperequirements are observed,the measurements are a goodapproximation to absolute properties.Test accuracy available isprimarily limited by the accuracy of instrumentation.In mostcases,equivalent results may be obtained using Test MethodA773/A773M or the test methods of IEC Publication 60404-4.1.5 This test method permits a choice of test specimen topermit measurement of properties in any desired directionrelative to the direction of crystallographic orientation withoutinterference from external yoke systems.1.6 The symbols and abbreviated definitions used in this testmethod appear in Fig.1 and Sections 5,6,9,and 10.For theofficial definitions see Terminology A340.Note that the termflux density used in this document is synonymous with the termmagnetic induction.1.7 WarningMercury has been designated by EPA andmany state agencies as a hazardous material that can causecentral nervous system,kidney,and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury-containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAs website(http:/www.epa.gov/mercury/faq.htm)for additional informa-tion.Users should be aware that selling mercury or mercury-containing products,or both,in your state may be prohibited bystate law.1.8 The values stated in either customary(cgs-emu andinch-pound)units or SI units are to be regarded separately asstandard.Within this test method,the SI units are shown inbrackets except for the sections concerning calculations wherethere are separate sections for the respective unit systems.Thevalues stated in each system are not 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 method.1.9 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 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A34/A34M Practice for Sampling and Procurement Testingof Magnetic MaterialsA340 Terminology of Symbols and Definitions Relating toMagnetic TestingA341/A341M Test Method for Direct Current MagneticProperties of Materials Using D-C Permeameters and theBallistic Test MethodsA343/A343M Test Method for Alternating-Current Mag-netic Properties of Materials at Power Frequencies Using1This test method is under the jurisdiction of ASTM Committee A06 onMagnetic Properties and is the direct responsibility of Subcommittee A06.01 on TestMethods.Current edition approved May 1,2014.Published June 2014.Originallyapproved in 1969.Last previous edition approved in 2009 as A596/A596M95(2009)1.DOI:10.1520/A0596_A0596M-14.2For 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 Wattmeter-Ammeter-Voltmeter Method and 25-cm Ep-stein Test FrameA773/A773M Test Method for Direct Current MagneticProperties of Low Coercivity Magnetic Materials UsingHysteresigraphs2.2 IEC Standard:3Publication 60404-4 Ed.2.2,Magnetic MaterialsPart 4:Methods of Measurement of the D