1、Designation: B470 02 (Reapproved 2017)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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDeve
6、lopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect at thetime of reference form a part of this specification to the extentreference
7、d herein:2.2 ASTM Standards: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 s
8、ize, material, construction, 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
9、 that in addition 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 sh
10、all consist of tinned copper 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
11、 6.1shall meet the minimum requirements of Table 1for 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 en
12、d.5.4 Mandrel Test, 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 mandre
13、ls shall be horizontaland so positioned that any vertical movement of the specimen1This 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 edition approved Apri
14、l 1, 2017. Published April 2017. Originallyapproved in 1968. Last previous edition approved in 2012 as B470 02 (2012).DOI: 10.1520/B0470-02R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards vo
15、lume 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 StatesThis international standard was developed in accordance with internationally recognized principles on sta
16、ndardization 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.1is minimized. The conductor as clamped for test shall passthrough the vertical center l
17、ine 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 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 spec
18、ified spacingduring test is maintained. 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) no
19、t less than 3 in. (76.2mm) below the 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 c
20、onductor, cut square at the end, shall 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
21、be wrapped six closeturns over a mandrel 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 th
22、eplace of manufacture unless otherwise 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 specific
23、a-tion (Explanatory Note 4).7.1.1 Unless 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 t
24、oinspection, certify that all wire in 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 fo
25、r acceptance at one time, such amount, 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
26、specimen is a length of wire removedfor test purposes from any 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 coatingdeterminations, the sample shall consist of four productionunits.
27、For continuity of coating determinations, 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 o
28、f production units shown inTable 4 under the heading “First Sample.”TABLE 1 Flex Life Requirements, Minimum CyclesConstructionUn-bonded(seeExplanatoryNote 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
29、 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 3.967 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 Fra
30、ying 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 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 Di
31、mensional MeasurementsNumber ofUnits in LotFirst Sample Second SampleAllowableNumber ofDefects inBothSamples, c2Number ofUnits inSample, n1AllowableNumber 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, i
32、ncl 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 (2017)27.3.3 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
33、 Package Marking8.1 The net mass, length (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 i
34、nside of the package.The same information, 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
35、 ofindividual orders.8.3 The conductors 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 II
36、I will conform to the requirements 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 equiva
37、lent to commercial tolerances for drill 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 continue
38、d conformance to the criteria, arenecessary 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 f
39、or information only as abasis for comparison 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
40、standard are expressly advised that 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
41、 andif not revised, either reapproved 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 committe
42、e, which you may attend. If you feel 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-
43、2959,United States. Individual reprints (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 stand
44、ard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 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 (2017)3
