1、Designation:B97310(Reapproved 2014)Standard Specification forTin-Coated Braid and Ribbon Flat Copper Wire intended foruse in Electronic Application1This standard is issued under the fixed designation B973;the number immediately following the designation indicates the year oforiginal adoption or,in t
2、he 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 specification covers tin-coated hard-drawn copperbraid and ribbon flat wire intended f
3、or electronic application(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 ExceptionsThe SI values for densit
4、y,resistivity,andvolume 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
5、 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B1 Specification for Hard-Drawn Copper WireB3 Specification for Soft or Annealed Copper WireB49 Specification for Copper Rod Drawing Stock for Elec-trical PurposesB193 Test Method for Resistivity of Electrical ConductorMa
6、terialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical Conductors2.2 Other Standards:3NBS Handbook 100 Copper Wire Tables3.Ordering Information3.1 Orders for material under this specification shall includethe following information:
7、3.1.1 Quantity of each size,3.1.2 Wire size-thickness and width in inches(see 5.3),3.1.3 Type of copper,if special(see 4.2),3.1.4 Package size(see 10.1),3.1.5 Special packaging marking,if required,and3.1.6 Place of inspection(see 7.1).4.Material4.1 Tin for CoatingThe tin shall be electroplated for t
8、hecoating and shall be commercially pure(Explanatory Note 1).For purposes of this specification,the tin shall be consideredcommercially pure if the total of other elements,exclusive ofcopper,does not exceed 1%.Not withstanding the previoussentence,chemical analysis of the tin coating or of the tin u
9、sedfor coating shall not be required under this specification.4.2 Copper-Base MetalThe base metal shall be copper ofsuch quality and purity that the finished product shall haveproperties and characteristics prescribed in this specification.NOTE1Specifications B1,B3,or B49 defines copper suitable for
10、 use.5.General Requirements(See Section 8)5.1 Tensile and ElongationThe tin-coated copper flat wirein the hard drawn condition shall conform to elongationrequirements of 1%minimum to 5%maximum.The tensilestrength shall be 55 000 psi(379 MPa)minimum.5.2 Resistivity(Explanatory Note 3)The electrical r
11、esis-tivity of the coated wire at a temperature of 20C shall notexceed the values prescribed in Table 1.5.3 Dimensions and Permissible VariationsThe flat wiresizes shall be expressed as the thickness and width of the wirein decimal fractions of an inch to the nearest 0.0001 in.(0.0025mm).The tin-coa
12、ted flat wire shall not vary from the specifiedthickness and width by more than the amounts specified inTable 2 and Table 3,respectively.5.4 Continuity of CoatingThe tin coating shall be continu-ous.The continuity of coating on the flat wire shall bedetermined on representative samples taken before
13、braiding1This 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.1,2014.Published October 2014.Originallyapproved in 2010.Last previous edi
14、tion approved in 2010 as B973 10.DOI:10.1520/B0973-10R14.2For 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.3Availabl
15、e from National Technical Information Service(NTIS),5301 ShawneeRd.,Alexandria,VA 22312,http:/www.ntis.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 applications or insulating.The continuity of coating shall bedetermined by the hydr
16、ochloric acid-sodium polysulfide test inaccordance with 6.4.5.5 JointsNecessary joints in the wire and rods prior tofinal coating and drawing shall be made in accordance with thebest commercial practice.There shall be no uncoated joints inthe final product.5.6 FinishThe coating shall consist of a smooth continu-ous layer,firmly adherent to the surface of the copper.The wireshall be free of all imperfections not consistent with the bestcommercial practice.6.Test Methods6.1 Tensile Strength and El
