ASTM_A_34_-_A_34M_-_06_2012.pdf

Designation:A34/A34M06(Reapproved 2012)Standard Practice forSampling and Procurement Testing of Magnetic Materials1This standard is issued under the fixed designation A34/A34M;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 practice covers sampling procedures and test prac-tices for determination of various magnetic properties of bothsoft and hard magnetic materials.1.2 This practice may be used either in conjunction with,orindependent of,the standard test methods and materials speci-fications under the jurisdiction of ASTM Committee A06.Inthe former situation,the sampling and testing procedures listedherein shall not supersede those found in the individual testmethods and materials specifications.In the latter situation,thesampling and testing procedures listed herein shall strictlyapply.1.3 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 bracketsexcept for the sections concerning calculations where there areseparate sections for the respective unit systems.The valuesstated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combin-ing values from the two systems may result in nonconformancewith this standard.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 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 Testing3.Terminology3.1 Definitions:3.1.1 For definitions of terms relating to magnetic testing,reference shall be made to Terminology A340.4.Significance and Use4.1 This practice defines test lots and describes the selectionand preparation of test specimens used in the determination ofmagnetic properties of various materials.4.2 A method of calculating the density of iron-base elec-trical steels is given and a table of assumed densities formagnetic testing of commercial soft magnetic alloys is pro-vided.5.Test Lots5.1 Wrought,Flat-Rolled,or Long Products:5.1.1 Atest lot of wrought,flat-rolled,or long products shallconsist of not more than 50 000 lb 23 000 kg of material.5.1.2 A test lot may be composed of coils or cut lengths.Atest lot of coil product may consist of one or more coils havingessentially the same treatment and composition.5.2 Amorphous Strip and Wire:5.2.1 A test lot shall consist of a continuously cast strip orwire in one coil without breaks.In practice this may representquantities up to 2200 lb 1000 kg.5.3 Powder Metallurgically Produced Parts:5.3.1 A test lot shall consist of parts of the same geometryand dimensions,made from powder of the same composition,molded and sintered under the same conditions,which havebeen submitted for inspection at one time.5.4 Cast Parts:5.4.1 A test lot shall consist of parts of the same geometryand dimensions,made from the same casting heat,which havebeen submitted for inspection at one time.6.Sampling6.1 Electrical Steel Coils:6.1.1 From test lots in coil form,consisting of only onemaster coil,prepare the test strips from test sheets cut from oneor both ends of the coil.6.1.2 When a test lot in coil form consists of several coilssheared or slit from a master coil,the test strips shall beprepared from test sheets representing one or both ends of themaster coil.1This practice is under the jurisdiction of ASTM Committee A06 on MagneticProperties and is the direct responsibility of Subcommittee A06.01on TestMethods.Current edition approved Nov.1,2012.Published November 2012.Originallyapproved in 1911.Last previous edition approved in 2006 as A34/A34M 06.DOI:10.1520/A0034_A0034M-06R12.2For 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 6.1.3 When a test lot in coil form consists of several coilshaving essentially the same treatment and composition,teststrips shall be prepared from test sheets cut from one or bothends of enough master coils to be representative of the lot.6.2 Electrical Steel Cut Lengths:6.2.1 When cut lengths are sheared from coil materialwithout subsequent treatments(such as roller leveling or coldrolling),the test on the original coil shall suffice.6.2.2 Two or more test sheets shall be taken from the samelot of cut length steel that has been cold