1、Designation: B470 02 (Reapproved 2012)Standard Specification forBonded Copper Conductors for Use in Hookup Wires forElectronic Equipment1This standard is issued under the fixed designation B470; the number immediately following the designation indicates the year oforiginal adoption or, in the case o
2、f 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 stranded uninsulated bare, tin,or tin-lead alloy coated copper condu
3、ctors in which wires in thestrand are metallically bonded together by the application ofheat or additional tin, or tin-lead alloy for use in hookup wirefor electronic equipment.1.2 The SI values for density and resistivity are to beregarded as standard. For all other properties, the inch-poundvalues
4、 are to be regarded as the standard and the SI units maybe approximate.1.3 The hazard caveat pertains only to Section 6 of thisspecification. This standard does not purport to address all ofthe safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to
5、establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect at thetime of reference form a part of this specification to the extentreferenced herein:2.2 ASTM Stand
6、ards:2B3 Specification for Soft or Annealed Copper WireB286 Specification for Copper Conductors for Use inHookup Wire for Electronic Equipment3. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size, material, construc
7、tion, and type(see 4.1),3.1.2 Package size (see 8.1),3.1.3 Special package marking if required (Section 8), and3.1.4 Place of inspection (Section 7).4. Conductor Constructions4.1 Conductor constructions shall conform to the applicableconstructions of Specification B286, except that in addition thefo
8、llowing bondings may be specified:4.1.1 Type IBare copper, stranded, light bonding,4.1.2 Type IITin or tin-lead alloy coated copper, stranded,light bonding, or4.1.3 Type IIITin or tin-lead alloy coated copper, stranded,heavy bonding.5. General Requirements5.1 The conductors shall consist of tinned c
9、opper conform-ing to the product description, quality and specification re-quirements of Specification B286 and bare copper conformingto the product description, quality and specification require-ments of Specification B3.5.2 Flex LifeThe average of six flex tests specified in 6.1shall meet the mini
10、mum requirements of Table 1 for theapplicable type and construction.5.3 Fraying, Types I and IIAfter performing the test in6.2, no separations of strands shall be visible to the unaided eye(normal spectacles excepted), from the cut end to the point ofbend nearest to that cut end.5.4 Mandrel Test, Ty
11、pe III Only (see Explanatory Note1)After performing the test specified in 6.3 no separation ofstrands shall be visible to the unaided eye (normal spectaclesexcepted).6. Test Methods6.1 Flex LifeThe testing equipment shall be designed andset up for operation so that steel mandrels shall be horizontal
12、and so positioned that any vertical movement of the specimenis minimized. The conductor as clamped for test shall passthrough the vertical center line between the mandrels.6.1.1 The conductor shall be bent repeatedly in alternatingdirections in an arc of 60 on both sides of the vertical centerline o
13、f the mandrels, at a rate of 24 to 36 cpm, betweenmandrels of size and spacing specified in Table 2. The1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current
14、 edition approved Oct. 15, 2012. Published November 2012. Originallyapproved in 1968. Last previous edition approved in 2007 as B470 02 (2007).DOI: 10.1520/B0470-02R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
15、 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 States1mandrels must be so supported that the specified spacingduring test is maintain
16、ed. Mandrel deflection must be avoided.The conductor shall be clamped at a point not less than 1 in.(25.4 mm) above the horizontal center line of the mandrels. Aload, as specified in Table 2, shall be applied to the free end ofthe conductor (Explanatory Note 2) not less than 3 in. (76.2mm) below the
17、 horizontal center line of the mandrels. Onecycle occurs when starting from normal the conductor is bent60 in one direction, reverse bent 120 through the normalposition, and then back to normal. Complete rupture of theconductor terminates the test.6.2 FrayingThe conductor, cut square at the end, sha
18、ll beinserted into a blind hole of the size and depth indicated inTable 3. The edge of the hole shall be broken to no more than164 in. (0.40 mm) radius. The conductor shall be bent 90 overthe edge of the hole and back to normal.6.3 Mandrel TestThe conductor shall be wrapped six closeturns over a man
19、drel as specified in Table 3 and slipped off theend of the mandrel for examination (Explanatory Note 3).6.4 ResistanceThe conductors after bonding shall meetthe requirements of Specification B286.7. Inspection7.1 GeneralAll test and inspections shall be made at theplace of manufacture unless otherwi
20、se agreed upon betweenthe manufacturer and the purchaser at the time of the purchase.The manufacturer shall afford the inspector representing thepurchaser all reasonable facilities to satisfy him that thematerial is being furnished in accordance with this specifica-tion (Explanatory Note 4).7.1.1 Un
21、less otherwise agreed by the manufacturer and thepurchaser, conformance of the wire to the various requirementslisted in Section 5 shall be determined on samples taken fromeach lot of wire presented for acceptance.7.1.2 The manufacturer shall, if requested prior toinspection, certify that all wire i
22、n the lot made under suchconditions that the product as a whole conforms to therequirements of this specification as determined by regularlymade and recorded tests.7.2 Terms Used for Inspection:7.2.1 LotA lot is any amount of wire of one class and sizepresented for acceptance at one time, such amoun
23、t, however,not to exceed 10 000 lb (4500 kg).7.2.2 SampleA sample is a quantity of production units(coils, reels, etc.) selected at random from the lot for thepurpose of determining conformance of the lot to the require-ments of this specification.7.2.3 SpecimenA specimen is a length of wire removed
24、for test purposes from any individual production unit of thesample.7.3 Sample Size The number of production units in asample shall be as follows:7.3.1 For elongation, resistivity, and mass of coatingdeterminations, the sample shall consist of four productionunits. For continuity of coating determina
25、tions, the sampleshall consist of eight production units. From each unit, one testspecimen of sufficient length shall be removed for the perfor-mance of the required test.7.3.2 For dimensional measurements and surface finish, thesample shall consist of a quantity of production units shown inTable 4
26、under the heading “First Sample.”7.3.3 For packaging inspection (when specified by thepurchaser at the time of placing order), the sample shall consistof a quantity of production units shown in Table 5.TABLE 1 Flex Life Requirements, Minimum CyclesConstructionUn-bonded(seeExplanatoryNote 5)Type Iand
27、 II(LightBonding)Type III(HeavyBonding)7 wire 40 30 2010 wire 55 40 2516 wire 85 60 4019 or more wires 100 70 50TABLE 2 Conditions for Flex TestSize,AWGNominalMandrelDiameter(ExplanatoryNote 4)MandrelSpacingMass, gin. mm in. mm16 0.2344 5.954 0.065 1.65 151118 0.1875 4.762 0.056 1.42 95120 0.1562 3.
28、967 0.046 1.17 59822 0.1250 3.175 0.037 0.94 37624 0.0937 2.380 0.031 0.79 23626 0.0625 1.588 0.026 0.66 149TABLE 3 Conditions for Fraying and Mandrel TestsSize,AWGFrayingTestMandrelTestHoleDiameterHoleDepthMandrelDiameterin. mm in. mm in. mm16 0.063 1.6014 6.35316 4.7618 0.055 1.4014 6.3518 3.1820
29、0.046 1.17316 4.76564 1.9822 0.037 0.94316 4.76364 1.1924 0.031 0.7918 3.18132 0.7926 0.026 0.6618 3.18132 0.79TABLE 4 Sampling for Dimensional MeasurementsNumber ofUnits in LotFirst Sample Second SampleAllowableNumber ofDefects inBothSamples, c2Number ofUnits inSample, n1AllowableNumber ofDefects i
30、nSample, c1Number ofUnits inSample, n2n1+n21 to 14, incl all 0 . . 015 to 50, incl 14 0 . . 051 to 100, incl 19 0 23 42 1101 to 200, incl 24 0 46 70 2201 to 400, incl 29 0 76 105 3401 to 800, incl 33 0 112 145 4Over 800 34 0 116 150 4B470 02 (2012)28. Packaging and Package Marking8.1 The net mass, l
31、ength (or lengths, and number of lengths,if more than one length is included in the package), sizedesignation, type of conductor, purchase order number, and anyother marks required by the purchase order shall be marked ona tag attached to the end of the conductor inside of the package.The same infor
32、mation, together with the manufacturers serialnumber (if any) and all shipping marks required by thepurchaser, shall appear on the outside of each package.8.2 Package sizes for conductors shall be agreed uponbetween the manufacturer and the purchaser in the placing ofindividual orders.8.3 The conduc
33、tors shall be protected against damage inordinary handling and shipping.9. Keywords9.1 bonded copper conductors; copper conductor for elec-tronic equipment; copper electrical conductor; electrical con-ductor; electrical conductorcopperEXPLANATORY NOTESNOTE 1Type III will conform to the requirements
34、of the fraying testbut performance of the test is not required.NOTE 2Test weight is designed to impose a load of 1500 psi (10.3MPa) calculated for a nominal 7 wire construction.NOTE 3Mandrel diameters are to be controlled by the followingtolerances which are equivalent to commercial tolerances for d
35、rill rod:Up to and including 0.124 in. 6 0.0003 in. (3.150 mm 6 0.0076 mm)0.125 in. to and including 0.499 in. 6 0.0005 in. (3.175 mm to andincluding 12.675 mm 6 0.0127 mm)NOTE 4Cumulative results secured on the product of a singlemanufacturer, indicating continued conformance to the criteria, arene
36、cessary to ensure an overall product meeting the requirements of thisspecification. The sample size and conformance criteria given for thevarious characteristics are applicable only to lots produced under theseconditions.NOTE 5Unbonded flex life values are given for information only as abasis for co
37、mparison to bonded construction. A solid wire of the sameAWG number will exhibit a minimum of 10 cycles.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that
38、determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapprove
39、d or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel
40、 that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual repri
41、nts (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the AST
42、M website (www.astm.org/COPYRIGHT/).TABLE 5 Sampling for Surface Finish and Packaging InspectionNumber of Unitsin LotNumber ofUnits inSample, nAllowableNumber ofDefectiveUnits, c1 to 30, incl all 031 to 50, incl 30 051 to 100, incl 37 0101 to 200, incl 40 0201 to 300, incl 70 1301 to 500, incl 100 2501 to 800, incl 130 3Over 800 155 4B470 02 (2012)3
