ASTM_B_566_-_04a_2016.pdf

Designation:B56604a(Reapproved 2016)Standard Specification forCopper-Clad Aluminum Wire1This standard is issued under the fixed designation B566;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers bare round copper-clad alumi-num wire for electrical applications.1.2 Four classes of copper-clad aluminum wire are coveredas follows:Class 10ANominal 10 volume%copper,annealed.Class 15ANominal 15 volume%copper,annealed.Class 10HNominal 10 volume%copper,hard-drawn.Class 15HNominal 15 volume%copper,hard-drawn.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3.1 ExceptionThe values stated in SI units for resistivityand density are to be regarded as standard.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 National Institute of Standards and Technology:3NBS Handbook 100 Copper Wire Tables3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lota lot is any amount of wire of one class and sizepresented for acceptance at one time;such amount,however,not to exceed 100 production units.3.1.2 samplea quantity of production units(coils,reels,and so forth)selected at random from the lot for the purpose ofdetermining conformance of the lot to the requirements of thisspecification.3.1.3 specimena length of wire removed for test purposesfrom any individual production unit of the sample.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size and class;4.1.2 Wire size,diameter in inches(see Section 7 and Table1);4.1.3 Class of wire(see 1.2 and Table 1);4.1.4 Packaging and shipping(Section 14 and packaginginspection if required,13.1);and4.1.5 Place of inspection(see 13.1).5.Materials and Manufacture5.1 The wire shall consist of a core of aluminum with acontinuous outer cladding of copper thoroughly bonded to thecore throughout and shall be of such quality as to meet therequirements of this specification.6.General Requirements6.1 Tensile Strength and ElongationThe copper-clad alu-minum wire shall conform to the tensile strength and elonga-tion requirements of Table 1.For intermediate diameters notlisted in Table 1,the elongation requirements of the nextsmaller size shall apply;in the case of tensile strength therequirements of the next larger size shall apply.6.2 ResistivityThe electrical resistivity at a temperature of20C shall not exceed the values prescribed in Table 2.SeeNote 1 for calculating electrical resistance.NOTE1Relationships which may be useful in connection with thevalues of electrical resistivity prescribed in this specification are shown inTable 3.Resistivity units are based on the International Annealed CopperStandard(IACS)adopted by IEC in 1913,which is158mm2/m and thevalue of 0.15328 g/m2at 20C are,respectively,the international1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onBi-Metallic Conductors.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1972.Last previous edition approved in 2011 as B566 04a(2011).DOI:10.1520/B0566-04AR16.2For 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 from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 equivalent of volume and weight resistivity of annealed copper equal to100%conductivity.The later term means that a copper wire 1 m in lengthand weighing 1 g would have a resistance of 0.15328.This is equivalentto a resistivity value of 875.20 lb/mile2,which signifies the resistance ofa copper wire 1 mile in length weighing 1 lb.It is also equivalent,forexample,to 1.7241/cm of length of a copper bar 1 cm2in cross section.A complete discussion of this subject is contained in NBS Handbook 100.The use of five significant figures in expressin