1、Designation: B 470 02 (Reapproved 2007)Standard Specification forBonded Copper Conductors for Use in Hookup Wires forElectronic Equipment1This standard is issued under the fixed designation B 470; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 co
3、nductors 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-poundval
4、ues 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
5、to 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 St
6、andards:2B3 Specification for Soft or Annealed Copper WireB 286 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, cons
7、truction, 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 B 286, except that in addition
8、thefollowing 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 tin
9、ned copper conform-ing to the product description, quality and specification re-quirements of Specification B 286 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 th
10、e minimum 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 Te
11、st, Type 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 hori
12、zontaland 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 center
13、line of the mandrels, at a rate of 24 to 36 cpm, betweenmandrels of size and spacing specified in Table 2. Themandrels must be so supported that the specified spacingduring test is maintained. Mandrel deflection must be avoided.1This specification is under the jurisdiction of ASTM Committee B01 onEl
14、ectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved March 15, 2007. Published April 2007. Originallyapproved in 1968. Last previous edition approved in 2002 as B 470 02.2For referenced ASTM standards, visit the
15、 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, U
16、nited States.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 horizontal center line of
17、 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, shall beinserted into a blind
18、 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 sixclose turns over a mandrel as specified in Table
19、 3 and slippedoff the end of the mandrel for examination (Explanatory Note3).6.4 ResistanceThe conductors after bonding shall meetthe requirements of Specification B 286.7. Inspection7.1 GeneralAll test and inspections shall be made at theplace of manufacture unless otherwise agreed upon betweenthe
20、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 Unless otherwise agreed by t
21、he 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 to inspec-tion, certify that all wire in the lot made under suc
22、h conditionsthat the product as a whole conforms to the requirements of thisspecification as determined by regularly made and recordedtests.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 amount, however,not to exceed
23、 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 removedfor test purposes from a
24、ny individual production unit of thesample.7.3 Sample SizeThe number of production units in asample shall be as follows:7.3.1 For elongation, resistivity, and mass of coating deter-minations, the sample shall consist of four production units.For continuity of coating determinations, the sample shall
25、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 under the heading “Firs
26、t 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 5.8. Packaging and Package Marking8.1 The net mass, length (or lengths, and number of lengths,if more than one length is in
27、cluded 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.TABLE 1 Flex Life Requirements, Minimum CyclesConstructionUn-bonded(seeExplanatoryNo
28、te 5)Type Iand 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 9
29、5120 0.1562 3.967 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
30、6.3518 3.1820 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, n1AllowableNumb
31、er ofDefects inSample, 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 4B 470 02 (2007)2The same information, together with
32、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 conductors shall be protecte
33、d 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 of the fraying testbut
34、 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 drill rod:Up to and inc
35、luding 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 single manu-facturer, indicating continued conformance to the criteria, are necessary toensure an
36、 overall product meeting the requirements of this specification.The sample size and conformance criteria given for the various charac-teristics are applicable only to lots produced under these conditions.NOTE 5Unbonded flex life values are given for information only as abasis for comparison to bonde
37、d 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 determination of
38、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 reapproved or withdrawn. Y
39、our 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 that your commen
40、ts 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 reprints (single or mu
41、ltiple 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).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 4B 470 02 (2007)3
