1、Designation: B566 04a (Reapproved 2011)Standard Specification forCopper-Clad Aluminum Wire1This standard is issued under the fixed designation B566; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
2、r 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 Department of Defense.1. Scope1.1 This specification covers bare round copper-clad alumi-num
3、wire for electrical applications.1.2 Four classes of copper-clad aluminum wire are coveredas follows:Class 10ANominal 10 volume % copper, annealed.Class 15ANominal 15 volume % copper, annealed.Class 10HNominal 10 volume % copper, hard-drawn.Class 15HNominal 15 volume % copper, hard-drawn.1.3 The val
4、ues 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.1.3.1 ExceptionThe values stated in SI units for resistivityand density are to be regarded as st
5、andard.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
6、and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 National Institute of Standards and Technology:3NBS Handbook 100Copper Wire Tables3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lota lot is any amount of wire of one class and sizepre
7、sented for acceptance at one time; such amount, however,not to exceed 100 production units.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 specim
8、ena length of wire removed for test purposesfrom any individual production unit of the sample.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size and class;4.1.2 Wire size, diameter in inches (see Section 7 and Ta
9、ble1);4.1.3 Class of wire (see 1.2 and Table 1);4.1.4 Packaging and shipping (Section 14 and packaginginspection if required, 13.1); and4.1.5 Place of inspection (see 13.1).5. Materials and Manufacture5.1 The wire shall consist of a core of aluminum with acontinuous outer cladding of copper thorough
10、ly bonded to thecore throughout and shall be of such quality as to meet therequirements of this specification.6. General Requirements6.1 Tensile Strength and ElongationThe copper-clad alu-minum wire shall conform to the tensile strength and elonga-tion requirements of Table 1. For intermediate diame
11、ters notlisted in Table 1, the elongation requirements of the nextsmaller size shall apply; in the case of tensile strength therequirements of the next larger size shall apply.6.2 ResistivityThe electrical resistivity at a temperature of20C shall not exceed the values prescribed in Table 2. SeeNote
12、1 for calculating electrical resistance.NOTE 1Relationships which may be useful in connection with thevalues of electrical resistivity prescribed in this specification are shown inTable 3. Resistivity units are based on the International Annealed CopperStandard (IACS) adopted by IEC in 1913, which i
13、s158 Vmm2/m and thevalue of 0.15328 Vg/m2at 20C are, respectively, the internationalequivalent of volume and weight resistivity of annealed copper equal to1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.
14、06 onComposite Conductors.Current edition approved April 1, 2011. Published September 2011. Originallyapproved in 1972. Last previous edition approved in 2004 as B566 04a. DOI:10.1520/B0566-04AR11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service a
15、t 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 3460, Gaithersburg, MD 20899-3460.1Copyright ASTM International, 100 Barr
16、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.100 % conductivity. The later term means that a copper wire1minlengthand weighing 1 g would have a resistance of 0.15328 V. This is equivalentto a resistivity value of 875.20 Vlb/mile2, which signifies the resistanceof a cop
17、per wire 1 mile in length weighing 1 lb. It is also equivalent, forexample, to 1.7241 V/cm of length of a copper bar 1 cm2in cross section.A complete discussion of this subject is contained in NBS Handbook 100.The use of five significant figures in expressing resistivity does not implythe need for g
18、reater accuracy of measurement than that specified in TestMethod B193. The use of five significant figures is required for completereversible conversion from one set of resistivity units to another.6.3 CohesionThe copper-clad aluminum wire, whentested in accordance with 10.4, shall be free from seam
19、s orsplits. Examination of the wire shall be made at a magnificationnot to exceed 103.6.4 AdhesionThe copper-clad aluminum wire, whentested in accordance with 10.5, shall be free from claddingdelamination. Examination of the wire shall be made at amagnification not to exceed 103.6.5 JointsThe finish
20、ed wire shall contain no joints orsplices.6.6 Copper ThicknessThe minimum copper thickness,when tested in accordance with 10.6, shall be not less than thefollowing:6.6.1 Class 10A and 10H wire shall have a minimumthickness of not less than 3.5 % of the wire radius.6.6.2 Class 15A and 15H wire shall
21、have a minimumthickness of not less than 5.0 % of the wire radius.6.7 Copper Volume (Area)The copper volume (area) perclass, when tested in accordance with 10.6, shall meet thefollowing tolerances:6.7.1 Class 10A and 10H wire shall contain not less than8 % and not more than 12 % copper by volume (ar
22、ea).6.7.2 Class 15A and 15H wire shall contain not less than13 % and not more than 17 % copper by volume (area).7. Dimensions, Mass and Permissible Variations7.1 The wire size shall be expressed as the diameter of thewire in decimal fractions of an inch to the nearest 0.0001 in.(0.003 mm) (Note 2).
23、For diameters under 0.0100 in. (0.254mm), the wire shall not vary from the specified diameter bymore than 60.0001 in. (60.003 mm) and for diameters of0.0100 in. (0.254 mm) and over, the wire shall not vary fromthe specified diameter by more than 61 %, expressed to thenearest 0.0001 in. (0.003 mm).NO
24、TE 2The values of the wire diameters in Table 1 are given to thenearest 0.0001 in. (0.003 mm) and correspond to the standard sizes givenin Specification B258. The use of gage numbers to specify wire sizes is notrecognized in this specification because of the possibility of confusion. Adiscussion of
25、wire gages and related subjects is contained in “Copper WireTables,” NBS Handbook 100.8. Workmanship, Finish, and Appearance8.1 The wire, when tested in accordance with 8.2, shall befree from pits, slivers, exposed aluminum, or other imperfec-tions not consistent with good commercial practice.8.2 Fo
26、r wire diameters of 0.0720 in. (1.829 mm) and larger,surface finish inspection shall be made with the unaided eye(normal spectacles excepted), and for wire diameters smallerthan 0.0720 in., surface finish inspection shall be made at amagnification not to exceed 103.9. Sampling9.1 The number of produ
27、ction units in a sample shall be asfollows:9.1.1 For tensile strength, elongation, resistivity, adhesion,cohesion, and dimensional measurements, the sample shallconsist of a quantity of production units shown in Table 4under heading “First Sample.” From each unit, one testTABLE 1 Tensile and Elongat
28、ion Requirements for Copper-CladAluminum WireNominalDiameterTensile StrengthElongation, min,%in10in.(or 250 mm)in. (mm)Minimum AllH ClassesMaximum AllA ClassesAll HClassesAll AClassesksi (MPa) ksi (MPa)0.3249 8.252 16 110 20 138 1.5 150.2893 7.348 16 110 20 138 1.5 150.2576 6.543 18 124 20 138 1.5 1
29、50.2294 5.827 20 138 20 138 1.5 150.2043 5.189 22 152 20 138 1.5 150.1819 4.620 23 159 20 138 1.5 150.1620 4.115 24 166 20 138 1.5 150.1443 3.665 25 172 20 138 1.5 150.1285 3.264 26 179 20 138 1.0 150.1144 2.906 27 186 20 138 1.0 150.1019 2.588 28 193 20 138 1.0 150.0907 2.30 29 200 20 138 1.0 150.0
30、808 2.05 30 207 20 138 1.0 150.0720 1.83 30 207 20 138 1.0 150.0641 1.63 30 207 20 138 1.0 150.0571 1.45 30 207 20 138 1.0 150.0508 1.29 30 207 20 138 1.0 150.0453 1.15 30 207 20 138 1.0 150.0403 1.02 30 207 20 138 1.0 150.0359 0.912 30 207 20 138 1.0 150.0320 0.813 30 207 20 138 1.0 150.0285 0.724
31、30 207 20 138 1.0 150.0253 0.643 30 207 20 138 1.0 150.0226 0.574 30 207 25 172 1.0 100.0201 0.511 30 207 25 172 1.0 100.0179 0.455 30 207 25 172 1.0 100.0159 0.404 30 207 25 172 1.0 100.0142 0.361 30 207 25 172 1.0 100.0126 0.320 30 207 25 172 1.0 50.0113 0.287 30 207 25 172 1.0 50.0100 0.254 30 20
32、7 25 172 1.0 50.0089 0.226 30 207 25 172 1.0 50.0080 0.203 30 207 25 172 1.0 50.0071 0.180 30 207 25 172 1.0 50.0063 0.160 30 207 25 172 1.0 50.0056 0.142 30 207 25 172 1.0 50.0050 0.127 30 207 25 172 1.0 5TABLE 2 ResistivityResistivity, max, at 20CClass of Wire Vmm2/m10A and 10H 0.0274315A and 15H
33、0.02676B566 04a (2011)2specimen of sufficient length shall be removed for the perfor-mance of the required tests.9.1.2 For surface finish and packaging inspection (whenspecified by the purchaser at the time of placing the order), thesample shall consist of a quantity of production units as shownin T
34、able 5.10. Test Methods10.1 Tensile Strength and ElongationThe tensile strength,expressed in pounds-force per square inch (or megapascals),shall be obtained by dividing the maximum load attained by thespecimen during the tension test, by the original cross-sectionalarea of the specimen. Tensile stre
35、ngth and elongation may bedetermined simultaneously on the same specimen.10.1.1 The elongation of wire may be determined as thepermanent increase in length, expressed in percent of theoriginal length, due to the breaking of the wire in tension,measured between gage marks placed originally 10 in. (25
36、0mm) apart upon the test specimen (Note 3). The elongation ofwire shall be determined as described preceding or by mea-surements made between the jaws of the testing machine.When the latter method is used, the zero length shall be thedistance between the jaws at the start of the tension test whenapp
37、roximately 10 % of the specified tensile strength has beenapplied and be as near 10 in. as practicable and the final lengthshall be the distance between the jaws at the time of rupture.The fracture shall be between gage marks in the case ofspecimens so marked or between the jaws of the testingmachin
38、e and not closer than 1 in. (25 mm) to either gage markor either jaw.NOTE 3It is known that the rate of loading during tension testingaffects the performance of the sample to a greater or lesser extentdepending upon many factors. In general, tested values of tensile strengthare increased and tested
39、values of elongation are reduced with increase ofspeed of the moving head of the testing machine. In case of tests on softor annealed wire, however, the effects of speed of testing are notpronounced. Tests of soft wire made at speeds of moving head whichunder no-load conditions are not greater than
40、12 in./min (300 mm/min) donot alter the final results of tensile strength and elongation determinationsto any practical extent. In the case of hard-drawn wire, these effects arepronounced when the speed of the moving head is excessive. It issuggested that tests be made at speeds of moving head which
41、, underno-load conditions, are not greater than 3 in./min (76 mm/min), but in nocase at a speed greater than that at which correct readings can be made.10.1.2 For Classes 10H and 15H, the elongation may bemeasured by means of an extensometer or other device suitablefor measuring percent elongation i
42、n 10 in., and having a vernierreading to 0.01 in. (0.25 mm) attached to the test specimen ata load of approximately 10 % of the specified tensile strength.The elongation shall be observed while applying a tension loadto the specimen and the reading when fracture occurs shall betaken as the elongatio
43、n of the specimen. Tests in which theelongation is less than specified, but in which the fracture hasoccurred within 1 in. of the jaws or extensometer clamps, shallbe disregarded.10.2 ResistivityThe electrical resistivity of the materialshall be determined in accordance with Test Method B193.10.3 Di
44、mensional MeasurementsDimensional measure-ments shall be made with a micrometer caliper equipped witha vernier graduated in 0.001 in. (0.0025 mm). each coil shall bemeasured at three places, one near each end and one near themiddle. From each spool approximately 12 ft (3.7 m) shall beunreeled and th
45、e wire measured in six places between thesecond (approximately 0.6 m) and twelfth foot from the end.10.4 Cohesion TestThe wire shall be twisted three turnsper length equivalent to 15 diameters of the wire to be testedand untwisted the same number of turns. An initial wire lengthlonger than specified
46、 may be used and the number of twistsincreased proportionately. The rate of applying the twist is notcritical.10.5 Adhesion TestThe wire shall be repeatedly reversebent to fracture by any convenient means.10.6 Copper Thickness and VolumeDetermination of theminimum copper thickness or copper volume s
47、hall be per-formed by microscopical examination of the polished end or bya stripping method or by any other suitable method agreedupon between the manufacturer and the purchaser.TABLE 3 Equivalent Resistivity ValuesClassVolume Con-ductivity at20C % IACSResistivity Equivalents at 20CVolume Mass/Unit
48、LengthVmm2/m Vcmil/ft Vin. Vcm Vlb/mile2 Vg/m210A and 10H 62.854 0.027430 16.500 1.0799 2.7430 526.26 0.09216415A and 15H 64.416 0.026765 16.100 1.0537 2.6765 560.88 0.098227TABLE 4 Sampling for Mechanical and Electrical TestsNumberof UnitsFirst Sample Second SampleNumber ofUnits inSample, n1Allowab
49、leNumber ofDefects inSample toAcceptLot, c1Numberof Unitsin Sample,n2n1+ n2AllowableNumber ofDefectsin BothSamples toAcceptLot, c213 all 0 . . 048 4 0 . . 0915 4 0 5 9 11625 5 0 9 14 12640 8 0 12 20 14165 12 0 18 30 166100 19 0 23 42 1TABLE 5 Sample for Surface Finish and Packaging InspectionNumber of Unitsin LotNumber of Unitsin Sample, nAllowable Number ofDefects in Sampleto Accept Lot, c13 all 048 4 0915 9 01625 14 02640 20 04165 30 066100 42 0B566 04a (2011)311. Conformance Criteria11.1 Any lot of wire, the samples of w
