1、Designation: B 566 04aStandard Specification forCopper-Clad Aluminum Wire1This standard is issued under the fixed designation B 566; 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
2、 indicates the year of last reapproval. Asuperscript epsilon (e) 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 wire for electr
3、ical 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 values stated in i
4、nch-pound units are to be regardedas the standard, except for resistivity and density, where the SIunits are the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this
5、 specification to theextent referenced herein:2.2 ASTM Standards:2B 193 Test Method for Resistivity of Electrical ConductorMaterialsB 258 Specification for Standard Nominal Diameters andCross-Sectional Areas of AWG Sizes of Solid Round WiresUsed as Electrical Conductors2.3 National Institute of Stan
6、dards 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 sizepresented for acceptance at one time; such amount, however,not to exceed 100 production units.3.1.2 samplea quantity of p
7、roduction 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 specimena length of wire removed for test purposesfrom any individual production unit of the sample.4. Ordering Information4
8、.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 Table1);4.1.3 Class of wire (see 1.2 and Table 1);4.1.4 Packaging and shipping (Section 14 and packaginginspection if re
9、quired, 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 thoroughly bonded to thecore throughout and shall be of such quality as to meet therequirements of this specification.6. Gener
10、al 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 diameters notlisted in Table 1, the elongation requirements of the nextsmaller size shall apply; in the case of tensile str
11、ength 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 1 for calculating electrical resistance.NOTE 1Relationships which may be useful in connection with thevalues of electr
12、ical 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 is158 Vmm2/m and thevalue of 0.15328 Vg/m2at 20C are, respectively, the internationalequivalent of volume and weight re
13、sistivity of annealed copper equal to100 % 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 resistance1This specification is under the jurisdiction o
14、f ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onComposite Conductors.Current edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1972. Last previous edition approved in 2004 as B 566 04.2For referenced ASTM standards,
15、 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 3
16、460, Gaithersburg, MD 20899-3460.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.of a copper 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 com
17、plete discussion of this subject is contained in NBS Handbook 100.The use of five significant figures in expressing resistivity does not implythe need for greater accuracy of measurement than that specified in TestMethod B 193. The use of five significant figures is required for completereversible c
18、onversion 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 seams orsplits. Examination of the wire shall be made at a magnificationnot to exceed 103.6.4 AdhesionThe copper-clad aluminum wire, whentested in
19、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 finished wire shall contain no joints orsplices.6.6 Copper ThicknessThe minimum copper thickness,when tested in accordance with 10.6, shall be not le
20、ss 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 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 acc
21、ordance 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 (area).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 Permiss
22、ible 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). 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 diame
23、ters 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).NOTE 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 Spec
24、ification B 258. The use of gage numbers to specify wire sizes isnot recognized in this specification because of the possibility of confusion.A discussion of wire gages and related subjects is contained in “CopperWire Tables,” NBS Handbook 100.8. Workmanship, Finish, and Appearance8.1 The wire, when
25、 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 For wire diameters of 0.0720 in. (1.829 mm) and larger,surface finish inspection shall be made with the unaided eye(normal spectacles excepted),
26、 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 production units in a sample shall be asfollows:9.1.1 For tensile strength, elongation, resistivity, adhesion,cohesion, and dimensional measurement
27、s, the sample shallconsist of a quantity of production units shown in Table 4TABLE 1 Tensile and Elongation Requirements for Copper-CladAluminum WireNominalDiameterTensile StrengthElongation, min,%in10in.(or 250 mm)in. (mm)Minimum AllH ClassesMaximum AllA ClassesAll HClassesAll AClassesksi (MPa) ksi
28、 (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 1.5 150.2294 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
29、 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 1.0 150.0808 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
30、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 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 0.36
31、1 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 30 207 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
32、 172 1.0 5TABLE 2 ResistivityResistivity, max, at 20CClass of Wire Vmm2/m10A and 10H 0.0274315A and 15H 0.02676B 566 04a2under heading “First Sample.” From each unit, one testspecimen of sufficient length shall be removed for the perfor-mance of the required tests.9.1.2 For surface finish and packag
33、ing inspection (whenspecified by the purchaser at the time of placing the order), thesample shall consist of a quantity of production units as shownin Table 5.10. Test Methods10.1 Tensile Strength and ElongationThe tensile strength,expressed in pounds-force per square inch (or megapascals),shall be
34、obtained by dividing the maximum load attained by thespecimen during the tension test, by the original cross-sectionalarea of the specimen. Tensile strength and elongation may bedetermined simultaneously on the same specimen.10.1.1 The elongation of wire may be determined as thepermanent increase in
35、 length, expressed in percent of theoriginal length, due to the breaking of the wire in tension,measured between gage marks placed originally 10 in. (250mm) apart upon the test specimen (Note 3). The elongation ofwire shall be determined as described preceding or by mea-surements made between the ja
36、ws 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 whenapproximately 10 % of the specified tensile strength has beenapplied and be as near 10 in. as practicable and the final lengthshall be the distance bet
37、ween 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 testingmachine 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 pe
38、rformance of the sample to a greater or lesser extentdepending upon many factors. In general, tested values of tensile strengthare increased and tested 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,
39、 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 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-
40、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, 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 m
41、ade.10.1.2 For Classes 10H and 15H, the elongation may bemeasured by means of an extensometer or other device suitablefor measuring percent elongation in 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 st
42、rength.The elongation shall be observed while applying a tension loadto the specimen and the reading when fracture occurs shall betaken as the elongation of the specimen. Tests in which theelongation is less than specified, but in which the fracture hasoccurred within 1 in. of the jaws or extensomet
43、er clamps, shallbe disregarded.10.2 ResistivityThe electrical resistivity of the materialshall be determined in accordance with Test Method B 193.10.3 Dimensional MeasurementsDimensional measure-ments shall be made with a micrometer caliper equipped witha vernier graduated in 0.001 in. (0.0025 mm).
44、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 the 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 thr
45、ee turnsper length equivalent to 15 diameters of the wire to be testedand untwisted the same number of turns. An initial wire lengthlonger than specified may be used and the number of twistsincreased proportionately. The rate of applying the twist is notcritical.10.5 Adhesion TestThe wire shall be r
46、epeatedly reversebent to fracture by any convenient means.10.6 Copper Thickness and VolumeDetermination of theminimum copper thickness or copper volume shall be per-formed by microscopical examination of the polished end or bya stripping method or by any other suitable method agreedupon between the
47、manufacturer and the purchaser.TABLE 3 Equivalent Resistivity ValuesClassVolume Con-ductivity at20C % IACSResistivity Equivalents at 20CVolume Mass/Unit 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.
48、0537 2.6765 560.88 0.098227TABLE 4 Sampling for Mechanical and Electrical TestsNumberof UnitsFirst Sample Second SampleNumber ofUnits inSample, n1AllowableNumber ofDefects inSample toAcceptLot, c1Numberof Unitsin Sample,n2n1+ n2AllowableNumber ofDefectsin BothSamples toAcceptLot, c213 all 0 . . 048
49、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 0B 566 04a311. Conformance Criteria11.1 Any lot of wire, the samples of which comply with theconformance criteria of this section, shall be considered ascomplying with the requirements of Section 6. Individualproduction units th
