ASTM_A_460_-_11_2016.pdf

Designation:A46011(Reapproved 2016)Standard Specification forCopper-Clad Steel Wire Strand1This standard is issued under the fixed designation A460;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.1.Scope1.1 This specification covers copper-clad steel wire strandcomposed of a number of round steel,copper-clad wires,foruse as guys,messengers,span wires,and for similar purposeswhere electrical conductance is not a requirement.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.2.Referenced Documents2.1 ASTM Standards:2A902 Terminology Relating to Metallic Coated Steel Prod-ucts3.Terminology3.1 For definitions of terms used in this specification seeTerminology A902.4.Classification4.1 The strand is classified by the minimum breakingstrength and number of wires in the strand as stated in Table 1.5.Ordering Information5.1 Orders for material under this specification shall includethe following information:5.1.1 Quantity of strand in feet.5.1.2 Breaking strength and number of wires in strand(4.1and Table 1).5.1.3 Package size of coils or reels from Table 2.5.1.4 ASTM designation and year of issue.6.Materials and Manufacture6.1 Each wire in the strand shall be composed of a steel coremade from steel produced by any commercially-acceptedsteel-making process,with a substantially uniform and con-tinuous copper cladding thoroughly bonded to it throughout.The thickness and adherence of the copper cladding on thefinished wire shall comply with the requirements prescribed inthis specification.6.2 Each wire in the strand shall be of such quality that,when drawn to the size specified in Table 1 and whenfabricated into strand,the finished copper-clad steel wire strandshall have the properties and characteristics prescribed in thisspecification.7.Stranding7.1 The strand shall consist of either 3 or 7 wires and,unlessotherwise specified,shall have a left lay with a uniform pitch.In 3-wire strand,the pitch shall be not less than 12 nor morethan 20 times the nominal diameter of the strand.In 7-wirestrand,the pitch shall be not less than 10 nor more than 16times the nominal diameter of the strand.A left lay is definedas a counter-clockwise twist away from the observer lookingalong the axis of the strand.All wires shall be stranded withuniform tension.7.2 All wires in the strand shall lie naturally in their truepositions in the completed strand,and when the strand is cut,the ends shall remain in position or be readily replaced by handand then remain in position.This may be accomplished by anymeans or process,such as preforming,post forming,or formsetting.8.Joints and Splices8.1 Joints or splices may be made prior to final wire drawingin individual finished wires composing the strand,providedthat such joints or splices have protection from corrosionequivalent to that of the copper-clad wire itself and that they donot decrease the strength of the finished strand below theminimum breaking strength shown in Table 1.A joint or spliceshall be not closer than 50 ft(15.2 m)to any other wire jointor splice in the strand.8.2 The finished strand shall not be joined or spliced as aunit,unless specifically permitted by the purchaser.9.Thickness of Copper Cladding9.1 The minimum thickness of the copper cladding at anypoint around the circumference of the wires taken from thefinished strand shall be not less than 8%of the wire radius.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility of subcom-mittee A05.12 on Wire Specifications.Current edition approved Nov.1,2016.Published November 2016.Originallyapproved in 1961.Last previous edition approved in 2011 as A460-11.DOI:10.1520/A0460-11R16.2For 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 9.2 The copper thickness shall be determined by either ofthe following:9.2.1 By direct measurements of cross sections of the wires,the ends of the specimens having been ground smooth,polished,and etched before being measured microscopically,or9.2.2 By means of a suitable electrical indicating instrumentoperating on the permeameter principle.10.Sampling10.1 For the purpose of inspecting the strand,tests shall bemade on representative samples.For lots of 10 000 lb(4536kg)or less,two samples shall be taken from separate reels orcoils in th