ASTM_E_1606_-_09.pdf

Designation:E160609Standard Practice forElectromagnetic(Eddy-Current)Examination of CopperRedraw Rod for Electrical Purposes1This standard is issued under the fixed designation E1606;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 practice covers the procedures that shall be fol-lowed in electromagnetic(eddy-current)examination of copperredraw rods for detecting discontinuities or imperfections of aseverity likely to cause failure or markedly impair surfacequality of the rod.These procedures are applicable for con-tinuous lengths of redraw rod in diameters from14to 138in.(6.4 to 35 mm)suitable for further fabrication into electricalconductors.1.2 This practice covers redraw rod made from tough-pitchor oxygen-free coppers.1.3 The procedures described in this practice are based onmethods for making use of stationary encircling annular testcoil systems.1.4 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to SI units that are provided for informationonly and are not considered standard.1.5 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:2E543 Specification for Agencies Performing NondestructiveTestingE1316 Terminology for Nondestructive Examinations2.2 ASNT Standards:SNT-TC-1A Recommended Practice for Personnel Qualifi-cation and Certification in Nondestructive Testing3ANSI/ASNT-CP-189 Standard for Qualification and Certifi-cation of Nondestructive Testing Personnel32.3 AIA Standard:NAS 410 Certification and Qualification of NondestructiveTesting Personnel43.Terminology3.1 Standard terminology relating to electromagnetic ex-amination may be found in Terminology E1316,Section C:Electromagnetic Testing.4.Summary of Practice4.1 Examination is performed by passing the rod lengthwisethrough a coil energized with alternating current at a fixedfrequency.The electrical impedance of the coil is affected byrod vibrations,rod dimensions,electrical conductivity of therod material,and metallurgical or mechanical discontinuities inthe rod surface.During passage of the rod,the changes inimpedance caused by these variables in the rod produceelectrical signals that are processed so as to actuate an audio,visual,or electrical signaling device or mechanical marker thatproduces a record.5.Significance and Use5.1 Eddy-current examination is a nondestructive method oflocating surface discontinuities in a product.Signals can beproduced by discontinuities located on the surface of the rod.Since the density of eddy-currents decreases nearly exponen-tially as the distance from the surface increases,deep-seateddefects may be undetected.5.2 Some indications obtained by this practice may not berelevant to product quality.For example,a signal may becaused by minute flaws or irregularities,by anomalies in the1This practice is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.07 onElectromagnetic Method.Current edition approved June 1,2009.Published July 2009.Originally approvedin 1994.Last previous edition approved in 2004 as E1606-99(2004)1.DOI:10.1520/E1606-09.2For 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.3Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.4Available from Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 material,or by other factors such as operator error,or acombination thereof,that are not detrimental to the end use ofthe product.Nonrelevant indications can mask unacceptablediscontinuities.On the other hand,relevant indications arethose that may result from nonacceptable discontinuities andshould be determined by agreement between the user and thesupplier.Any indication that is believed to be irrelevant shallbe regarded as unacceptable until it is demonstrated byreexamination or other means to be nonrelevant.6.Basis of Application6.1 Personnel QualificationIf specified in the contractualagreement,personnel performing examinations to this practiceshall be qualified in accordance with