ASTM_B_2_-_13.pdf

Designation:B213Standard Specification forMedium-Hard-Drawn Copper Wire1This standard is issued under the fixed designation B2;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This specification covers medium-hard-drawn roundcopper wire for electrical purposes(see Explanatory Note 1).1.2 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.1.2.1 ExceptionFor density,resistivity and temperature,the values stated in SI units are to be regarded as standard.1.3 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 The following documents of the issue in effect at thetime of reference form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B49 Specification for Copper Rod Drawing Stock for Elec-trical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 Other Documents:NBS Handbook 100 Copper Wire Tables of the NationalBureau of Standards33.Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size;3.1.2 Wire size:diameter in inches(see 5.3 and Table 1);3.1.3 Type of copper,if special(see Section 4);3.1.4 Package size(see 10.1);3.1.5 Special package marking,if required;and3.1.6 Place of inspection(Section 7).4.Materials4.1 The material shall be copper of such quality and puritythat the finished product shall have the properties and charac-teristics prescribed in this specification.NOTE1Specification B49 defines copper suitable for use.4.2 Copper bars of special qualities,forms,or types,as maybe agreed upon between the manufacturer and the purchaser,and which will conform to the requirements prescribed in thisspecification,may also be used.5.General Requirements(see Section 8)5.1 Tensile Strength and ElongationThe wire shall con-form to the requirements as to tensile properties prescribed inTable 1(Explanatory Note 3 and Note 4).For wire whosenominal diameter is more than 0.001 in.(0.025 mm)greaterthan a size listed in Table 1,but which is less than that of thenext larger size,the requirements of the next larger size shallapply.5.1.1 Tests on a specimen containing a joint shall show atleast 95%of the minimum tensile strength given in Table 1.Elongation tests shall not be made on a specimen containing ajoint.5.2 ResisitivityElectrical resistivity at 20C shall not ex-ceed the following values(see Explanatory Note 5):Nominal Diameter,in.Resistivity at 20C,lb/mile2g/m20.460 to 0.325(11.684 to 8.255 mm),incl896.150.15694Under 0.325 to 0.0403(8.255 to 1.024 mm),incl905.440.158575.3 Dimensions and Permissible VariationsWithin therange of diameters included in Table 1 the wire shall not vary1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1912.Last previous edition approved in 2012 as B2 121.DOI:10.1520/B0002-13.2For 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 from the specified diameter by more than 61%,expressed tothe nearest 0.0001 in.(0.001 mm)(see Explanatory Note 2).5.4 JointsNo joints shall be made in the completed wire(Explanatory Note 7).Joints in wire and rods,prior to finaldrawing,shall be made in accordance with the best commercialpractice and shall conform to the requirements prescribed in5.1.5.5 FinishThe wire shall be free of all imperfections notconsistent with the best commercial practice.6.Test Methods6.1 Tensile Strength and Elongation:6.1.1 Obtain the tensile strength,expressed in pounds persquare inch,by dividing the maximum load carried by thespecimen during the tension test,by