1、Designation:B498/B498M19Standard Specification forZinc-Coated(Galvanized)Steel Core Wire for Use inOverhead Electrical Conductors1This standard is issued under the fixed designation B498/B498M;the number immediately following the designation indicates the yearof original adoption or,in the case of r
2、evision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers round,zinc-coated,steel corewire with two classes of zinc coating for use in
3、 overheadelectrical conductors.1.2 This specification covers wire of diameter from 0.0500to 0.1900 in.or 1.27 to 4.82 mm,inclusive.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;theref
4、ore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princ
5、iples for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to th
6、eextent referenced herein.2.2 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel
7、 ProductsB6 Specification for ZincB193 Test Method for Resistivity of Electrical ConductorMaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions:3.1.1 lotunless otherwise specified in the contract ororder,a lot shall co
8、nsist of all coils of wire of the samediameter and unit lengths submitted for inspection at the sametime.3.1.2 product codeDefines product coating type,coatingclass and strength grade.Two product codes for productproduced to this specification:Class A Zinc Coated(CodeGA2);and Class C Zinc Coated(Cod
9、e GC2).4.Classification4.1 The wire is furnished in two classes of coating,Class Aor Class C,as specified,in conformance with the requirementsof Section 10 and Table 6 or Table 7.5.Ordering Information5.1 Orders for material under this specification shall includethe following information:5.1.1 Quant
10、ity of each size,5.1.2 Wire diameter in inches or millimeters(Section 14),5.1.3 Product Code(see 3.1.2 and 4.1),5.1.4 Certification,if required(Section 19),5.1.5 Test report,if required(Section 19),and5.1.6 Package size(Section 20).5.1.7 Order Example:Five multiple lengths of 12 000 ft.each,0.1327 i
11、n.GA2 wire,packaged onto wooden nonreturn-able reels,with certified test report.6.Materials and Manufacture6.1 The base metal shall be steel produced by the open-hearth,electric-furnace,or basic-oxygen process.6.2 The wire shall be cold drawn and coated with zinc toproduce the desired properties.6.3
12、 The slab zinc used for coating shall be high-grade orbetter,conforming to Specification B6.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.05 onConductors of Ferrous Metals.Current edition approved Marc
13、h 1,2019.Published April 2019.Originallypublished as B498 69 to replace B245 and B261.Last previous edition approvedin 2016 as B498/B498M 08(2016).DOI:10.1520/B0498_B0498M-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Ann
14、ual 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 StatesThis international standard was developed in accordance with internationally recogn
15、ized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 7.Chemical Composition7.1 The steel shall conform to the requiremen
16、ts prescribedin Table 1.7.2 Chemical analysis shall be conducted in accordancewith Test Methods,Practices,and Terminology A751.8.Tensile Test8.1 The zinc-coated steel core wire shall conform to thetensile and elongation requirements prescribed in Table 2 orTable 3 and a minimum breaking strength(lbs N)calculatedfrom the minimum required tensile and nominal wire diameter.The wire tensile strength used to determine compliance toTable 2 or Table 3 shall be calculated using the actual wirebreaking s