ASTM_B_501_-_10_2015.pdf

Designation:B50110(Reapproved 2015)Standard Specification forSilver-Coated,Copper-Clad Steel Wire for ElectronicApplication1This standard is issued under the fixed designation B501;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 silver-coated,round,copper-clad steel wire for electronic application.1.2 Silver coatings in mass percentages of the total mass ofthe coated wire are as follows:1.25,2.5,4.0,6.1,and 8.0.1.2.1 Silver-coated wire having different minimum percent-age of silver by mass may be obtained by mutual agreementbetween the manufacturer and the purchaser.For informationpurposes,the thickness of coating in microinches provided bythe mass percentages listed in 1.2 is shown in Table 1.1.3 Four classes of copper-clad steel wire are covered asfollows:Class 30HS nominal 30%conductivity hard-drawn,Class 30A nominal 30%conductivity annealed,Class 40HSnominal 40%conductivity hard-drawn,and Class 40A nomi-nal 40%conductivity annealed.1.4 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.1.4.1 ExceptionIn resistivity the SI units are to be re-garded as the standard1.5 The following safety hazards caveat pertains to the testmethod described in this specification.This standard does notpurport to address all of the safety problems,if any,associatedwith its use.It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.(CautionConsideration should be given to toxicity andflammability when selecting solvent cleaners.)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 ConductorsB452 Specification for Copper-Clad Steel Wire for Elec-tronic Application3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lotany amount of wire of one class and size pre-sented for acceptance at one time,such amount,however,notto exceed 10 000 lb(4500 kg)(Note 1).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.NOTE1Alot should comprise material taken from a product regularlymeeting the requirements of this specification.Inspection of individuallots of less than 500 lb(250 kg)of wire cannot be justified economically.For small lots of 500 lb(250 kg)or less,the purchaser may agree to themanufacturers regular inspection of the product as a whole as evidence ofacceptability of such small lots.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size,4.1.2 Wire size(see 7.1 and Table 1),4.1.3 Class of basis wire(see 1.3),4.1.4 Mass percentage of coating(see 1.2 and Table 1),4.1.5 Package size(see Section 12),4.1.6 Special packaging marking,if required,and1This specification is under the jurisdiction of ASTM Committee 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 1969.Last previous edition approved in 2010 as B501 10.DOI:10.1520/B0501-10R15.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.7 Place of inspection(see 9.1).5.Materials and Manufacture5.1 The basis material shall consist of copper-clad steel wireconforming to the product description,quality and specifica-tion requirements of Specification B452.5.2 The silver-coated wire shall consist of the basis wirecoated with silver.The quality of the silver-coated wire shall besuch that the finished product meets the properties and require-ments in this specification(Note 2).NOTE2Silver coatings on copper-clad steel provide for:(a)Abarrier between the copper and insulation whos