1、Designation:B502/B502M10(Reapproved 2017)Standard Specification forAluminum-Clad Steel Core Wire for Use in OverheadElectrical Aluminum Conductors1This standard is issued under the fixed designation B502/B502M;the number immediately following the designation indicates the yearof original adoption or
2、,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 round,aluminum-clad steelcore wire with two designations of
3、 tensile strengths,AW2(Normal Strength)and AW3(High Strength).1.2 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;therefore,eachsystem shall be used independently of the other.Combiningvalu
4、es from the two systems may result in non-conformancewith the standard.1.2.1 For conductor sizes designated by AWG,the require-ments in SI units have been numerically converted fromcorresponding values stated or derived in inch-pound units.Forconductor sizes designated by SI units only,the requireme
5、ntsare stated or derived in SI units.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Tra
6、de 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 theextent referenced herein.2.2 ASTM Standards:2B193 Test Method for Resistivity of Electrical ConductorM
7、aterialsE8 Test Methods for Tension Testing of Metallic Materials3.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 6.1),3.1.3 Core Wire Strength,AW2(Normal Strength)or AW3(H
8、igh Strength)(see Table 1 and Table 2),3.1.4 Package size:(see 17.1),3.1.5 Special packaging and package marking if required(see 16.1),and3.1.6 Place of inspection if other than place of manufacture(see 14.1).4.Materials and Manufacture4.1 The base metal shall be steel produced by the open-hearth,el
9、ectric-furnace,or basic-oxygen process and shall beof such composition that the finished clad wire shall have theproperties and characteristics prescribed in this specification.4.2 The aluminum used for cladding shall have a purity andquantity sufficient to meet thickness and resistance require-ment
10、s of this specification(see 7.1 and 9.1).5.Tensile Properties5.1 RequirementsThe aluminum-clad steel core wire shallconform to the tensile requirements prescribed in Table 1 andTable 2.Purchasers of core intended for use in conductorconstructions with annealed aluminum wires,such as ACSS/AW3,ACSS/TW
11、/AW3 may request the stranded steel core becompliant only with ultimate tensile strength and may waivecompliance with the 1%extension tensile requirement.Thisuse of the ultimate tensile requirement as an alternate to the 1%extension requirement shall be by agreement between thepurchaser and producer
12、 and shall be noted on product compli-ance documentation.In computing stress at 1%extension andultimate tensile strength,the actual diameter of the finishedwire shall be used.5.2 Elongation TestThe elongation shall be determined byan extensometer suitable for measuring elongation in 10.0 in.250 mm a
13、nd equipped with a vernier or other instrumentreading to 0.001 in.0.025 mm.It shall be attached to the testspecimen at a load equal to the initial tensile stress shown inTable 3 and Table 4.At this load the extensometer shall be1This specification is under the jurisdiction of ASTM Committee B01 onEl
14、ectrical Conductors and is the direct responsibility of Subcommittee B01.06 onBi-Metallic Conductors.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1970.Last previous edition approved in 2010 as B502/B502M 102.DOI:10.1520/B0502_B0502M-10R17.2For referenced ASTM stan
15、dards,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 19428-2
16、959.United StatesThis international standard was developed in accordance with internationally recognized 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 adjusted to the initial setting shown in Table 3 and Table 4.Upon application of further load,the tension shall be read at anextensometer reading of 1.0%to determine c
