1、Designation:B22715Standard Specification forHard-Drawn Copper-Clad Steel Wire1This standard is issued under the fixed designation B227;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
2、indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers bare hard-drawn round copper-clad steel wire for electrical purposes(Note 1).NOTE1Wire ordered to this specification is not intended fo
3、r redraw-ing.If wire is desired for this purpose,consult the manufacturer.1.2 Four grades of wire are specified,designated as follows(Note 2):Grade 40 HS,Grade 40 EHS,Grade 30 HS,andGrade 30 EHS.NOTE2The grades covered by this specification correspond to thefollowing commercial designations:Grade 40
4、 HS,High Strength,40%Conductivity.Grade 40 EHS,Extra High Strength,40%ConductivityGrade 30 HS,High Strength,30%Conductivity.Grade 30 EHS,Extra High Strength,30%Conductivity.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconvers
5、ions to SI units that are provided for information onlyand are not considered 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 Resist
6、ivity 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:NBS Handbook 100Copper Wire Tables33.Ordering Information3.1 Orders for material und
7、er this specification shall includethe following information:3.1.1 Quantity of each size and grade,3.1.2 Wire size:diameter in inches(see 5.1 and Table 1),3.1.3 Grade(see 1.2 and Table 1),3.1.4 Method of measuring elongation(see 7.3 and 7.4),3.1.5 Package size(see 14.1),3.1.6 Special package marking
8、,if required(Section 13),and3.1.7 Place of inspection(Section 15).4.Material4.1 The wire shall be composed of a steel core with asubstantially uniform and continuous copper cladding thor-oughly bonded to it throughout.4.2 The finished copper-clad steel wire shall conform to therequirements prescribe
9、d in this specification.5.Dimensions and Permissible Variations5.1 The size shall be expressed as the diameter of the wirein decimal fractions of an inch using four places of decimals,that is,in tenths of mils(Note 3).NOTE3The values of wire diameters in Table 1 are given to thenearest 0.0001 in.and
10、 correspond to the standard sizes given in Specifi-cation B258.In specifying diameters of wire or in inspecting wire,expressthe diameter to the fourth decimal place.The diameters preceded byasterisks are not in the American Wire Gage series and are also given tofour places of decimals.They correspon
11、d to certain numbers of theBirmingham Wire Gage of the British Standard Wire Gage and are usedfor communication lines.The use of gage numbers in specifying wire sizesis not recognized in these specifications because of the possibility ofconfusion.An excellent discussion of wire gages and related sub
12、jects iscontained in NBS Handbook 100of the National Institute of Standards andTechnology.35.2 Within the range of diameters included in Table 1,thewire shall not vary from the specified diameter by more thanthe following amounts rounded off to the nearest 0.1 mil(0.0001 in.):Specified Diameter,in.(
13、mm)Permissible Variations in SpecifiedDiameter0.2043(5.189)to 0.1000(2.540),incl1.5%0.0999(2.537)and under1.0%5.3 Ten percent,but not less than five coils or spools(or allif the lot is less than five)from any lot of wire,shall be gaged1This specification is under the jurisdiction of the ASTM Committ
14、ee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onComposite Conductors.Current edition approved April 1,2015.Published April 2015.Originallyapproved in 1948.Last previous edition approved in 2004 as B227 10.DOI:10.1520/B0227-15.2For referenced ASTM standards,vi
15、sit 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,Gaithe
16、rsburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 at three places.If accessible,one gaging shall be taken neareach end and one near the middle.If any of the selected coilsor spools fail to conform to the requirements for diameter asprescribed in 5.2,all coils or spools shall be gaged in themanner specified.6.Workmanship,Finish,and Appearance6.1 The surface of the wire shall be smooth and free from
