ASTM_B_910_-_B_910M_-_07_2013.pdf

Designation:B910/B910M07(Reapproved 2013)Standard Specification forAnnealed Copper-Clad Steel Wire1This standard is issued under the fixed designation B910/B910M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,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 bare round copper-clad steelfor the following applications:electrical,electronic,grounding,telecommunications,and other applications.1.2 Four conductivities are covered as follows:21,30,40,and 70%.1.3 Temper is designated as annealed.1.4 The values stated in inch-pound or SI units are to beregarded separately as the standard.Each system shall be usedindependently of the other.Combining values from the twosystems may result in nonconformance with the specification.For conductor sizes designated byAWG,the requirements in SIunits have been numerically converted from correspondingvalues stated or derived in inch-pound units.For conductorsizes designated by SI units only,the requirements are stated orderived in SI units.1.5 The following precautionary statement pertains to thetest method portion only,Section 7,of this specification:Thisstandard does not purport to address all of the safety concerns,if any associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on thedate of 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 Conductors2.3 NIST Document:3NBS Handbook 100 Copper Wire Tables3.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 5.2);3.1.3 Conductivity(see Table 1);3.1.4 Wire to be used for redraw or not;3.1.5 Packaging and shipping(see 10);and3.1.6 Place of inspection(see 6.1).4.Material4.1 The wire shall consist of a core of homogeneousopen-hearth,electric-furnace,or basic-oxygen steel with acontinuous outer cladding of copper thoroughly bonded to thecore throughout and shall be of such quality as to meet therequirements of this specification.5.General Requirements5.1 Tensile Strength and ElongationThe copper-clad steelwire shall conform to the tensile strength requirements of Table2.Because there are many carbon steel and copper thicknesscombinations available,the desired tensile strength should beagreed upon between the purchaser and manufacturer prior toplacing an order.The elongation shall be 15.0%minimum forall diameters listed in 5.2.5.2 DimensionsThe wire size range for this specificationshall be from 0.0253(0.643 mm)to 0.2294 in.(5.827 mm)diameter(see Note 1).5.2.1 Permissible VariationsThe wire sizes shall meet thefollowing tolerances:5.2.1.1 For diameters 0.1000 in.(2.54 mm)and over,thewire shall not vary from the specified diameter by more than 6112%,expressed to the nearest 0.0001 in.(0.003 mm).5.2.1.2 For diameters under 0.1000 in.(2.54 mm)and above0.0253 in.(0.643 mm),the wire shall not vary from the1This 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 1,2013.Published April 2013.Originallyapproved in 2000.Last previous edition approved in 2007 as B910/B910M 07.DOI:10.1520/B0910_B0910M-07R13.2For 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 specified diameter by more than 61%,expressed to thenearest 0.0001 in.(0.003 mm).NOTE1The values of the wire diameters in 5.2 are given to the nearest0.0001 in.(0.003 mm)and correspond to the standard sizes given inSpecification B258.The use of gage numbers to specify wire sizes is notrecognized in this specification because of the possibility of confusion.Anexcellent discussion of wire gages and related subjects is contained inNBS Handbook 100.5.3 Adhesion and Surface DefectsThe copper-clad steelwire,when tested in accordance with 7.4,shall not reveal anyseams,pits,slivers,or other imperfection of sufficient magni-tude to indicate