1、Designation: B 3 01 (Reapproved 2007)Standard Specification forSoft or Annealed Copper Wire1This standard is issued under the fixed designation B 3; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A numbe
2、r in parentheses indicates the year of last reapproval. A superscriptepsilon (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 drawn and annealed or softround
3、bare copper wire for electrical purposes (see ExplanatoryNote 1).1.2 The values stated in inch-pound or SI units are to beregarded separately as standard. Each system shall be usedindependently of the other. Combining values from the twosystems may result in non-conformance with the specification.Fo
4、r conductor sizes designated by AWG or kcmil sizes, therequirements in SI units are numerically converted from thecorresponding requirements in inch-pound units. For conductorsizes designation by AWG or kcmil, the requirements in SIunits have been numerically converted from correspondingvalues state
5、d or derived in inch-pound units. For conductorsizes designated by SI units only, the requirements are stated orderived in SI units.1.2.1 For density, resistivity and temperature, the valuesstated in SI units are to be regarded as standard.2. Referenced Documents2.1 The following documents of the is
6、sue in effect at thetime of reference form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B49 Specification for Copper Rod Drawing Stock forElectrical PurposesB 193 Test Method for Resistivity of Electrical ConductorMaterialsB 258 Specification for Nominal Diameters
7、and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 National Institute of Standards and Technology:NBS Handbook 100 Copper Wire Tables33. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity
8、 of each size,3.1.2 Wire size: diameter in inches (see 5.4 and Table 1),3.1.3 Type of copper, if special (Section 4),3.1.4 Package size (see 10.1),3.1.5 Special package marking, if required, and3.1.6 Place of inspection (see 9.1).4. Materials and Manufacture4.1 The material shall be copper of such q
9、uality and puritythat the finished product shall have the properties and charac-teristics prescribed in this specification.NOTE 1The following standards define the materials suitable for use:Specification B49.4.2 Copper bars of special qualities, forms, or types, as maybe agreed upon between the man
10、ufacturer and the purchaser,and which will conform to the requirements prescribed in thisspecification may also be used.5. General Requirements (see Section 7) )5.1 Tensile Strength and ElongationThe wire shall con-form to the requirements for elongation prescribed in Table 1(see Explanatory Note 2)
11、. No requirements for tensile strengthare specified. For wire whose nominal diameter is more than0.001 in. (0.025 mm) greater than a size listed in Table 1, butless than that of the next larger size, the requirements of thenext larger size shall apply.5.2 JointsNecessary joints in the completed wire
12、 and inthe wire and rods prior to final drawing shall be made inaccordance with the best commercial practice.5.3 ResistivityThe electrical resistivity 20C shall notexceed 875.20 Vlb/mile2(0.15328 Vg/m2).5.4 Dimensions and Permissible VariationsThe wire sizesshall be expressed as the diameter of the
13、wire in decimalfractions of an inch to the nearest 0.0001 in. (0.001 mm)1This 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 March 15, 2007
14、. Published April 2007. Originallyapproved in 1912. Last previous edition approved in 2001 as B301.2For referenced ASTM standards, 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 Doc
15、ument Summary page onthe ASTM website.3Available from the National Technical Information Service, 5285 Port RoyalRd, Springfield, VA 22161.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.(0.0025 mm) (see Explanatory Note 3). For diam
16、eters under0.0100 in. (0.2540 mm), the wire shall not vary from thespecified diameter by more than plus and minus 0.0001 in.(0.0025 mm), and for diameters of 0.0100 in. and over the wireshall not vary from the specified diameter by more than plusand minus 1 %, expressed to the nearest 0.0001 in. (0.
17、001 mm).5.5 FinishThe wire shall be free of all imperfections notconsistent with the best commercial practice.6. Test Methods6.1 Tensile Strength and ElongationNo test for tensilestrength shall be required.6.1.1 Determine the elongation of wire whose nominaldiameter is larger than 0.0808 in. (2.052
18、mm) in diameter 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. (254mm) apart upon the test specimen (see Explanatory Note 4).The elongation of wire whose nominal diameter
19、is 0.0808 in.(2.052 mm) and under may be determined as described aboveor by measurements made between the jaws of the testingmachine. When the latter method is used, the zero length shallbe the distance between the jaws at the start of the tension testand be as near 10 in. (254 mm) as practicable, a
20、nd the finallength shall be the distance between the jaws at the time ofrupture. The fracture shall be between gage marks in the caseof specimens so marked or between the jaws of the testingmachine and not closer than 1 in. (25.4 mm) to either gagemark or either jaw.6.2 ResistivityDetermine the elec
21、trical resistivity of thematerial in accordance with Test Method B 193 (see Explana-tory Note 5). The purchaser may accept certification that thewire was drawn from stock meeting the International Standardfor Annealed Copper instead of resistivity tests on the finishedwire.6.3 Dimensional Measuremen
22、tsMake dimensional mea-surements with a micrometer caliper equipped with a verniergraduated in 0.0001 in. (0.001 mm). Take measurements on atTABLE 1 Tensile RequirementsDiameter Area at 20C Elongation in10 in.(254 mm),%minin. mm cmils in.2mm20.4600 11.684 211 600 0.1662 107.0 350.4096 10.404 167 800
23、 0.1318 85.0 350.3648 9.266 133 100 0.1045 67.4 350.3249 8.252 105 600 0.08291 53.5 350.2893 7.348 83 690 0.06573 42.4 300.2576 6.543 66 360 0.05212 33.6 300.2294 5.827 52 620 0.04133 26.7 300.2043 5.189 41 740 0.03278 21.2 300.1819 4.620 33 090 0.02599 16.8 300.1620 4.115 26 240 0.02061 13.3 300.14
24、43 3.665 20 820 0.01635 10.5 300.1285 3.264 16 510 0.01297 8.37 300.1144 2.906 13 090 0.01028 6.63 300.1019 2.588 10 380 0.008155 5.26 250.0907 2.304 8 230 0.00646 4.17 250.0808 2.052 6 530 0.00513 3.31 250.0720 1.829 5 180 0.00407 2.63 250.0641 1.628 4 110 0.00323 2.08 250.0571 1.450 3 260 0.00256
25、1.65 250.0508 1.290 2 580 0.00203 1.31 250.0453 1.151 2 050 0.00161 1.04 250.0403 1.024 1 620 0.00128 0.823 250.0359 0.912 1 290 0.00101 0.654 250.0320 0.813 1 020 0.000804 0.517 250.0285 0.724 812 0.000638 0.411 250.0253 0.643 640 0.000503 0.324 250.0226 0.574 511 0.000401 0.259 250.0201 0.511 404
26、0.000317 0.205 200.0179 0.455 320 0.000252 0.162 200.0159 0.404 253 0.000199 0.128 200.0142 0.361 202 0.000158 0.102 200.0126 0.320 159 0.000125 0.081 200.0113 0.287 128 0.000100 0.065 200.0100 0.254 100 0.0000785 0.051 150.0089 0.226 79.2 0.0000622 0.040 150.0080 0.203 64.0 0.0000503 0.032 150.0071
27、 0.180 50.4 0.0000396 0.026 150.0063 0.160 39.7 0.0000312 0.020 150.0056 0.142 31.4 0.0000246 0.016 150.0050 0.127 25.0 0.0000196 0.013 150.0045 0.114 20.2 0.000 0159 0.010 150.0040 0.102 16.0 0.0000126 0.0081 150.0035 0.089 12.2 0.00000962 0.0062 150.0031 0.079 9.61 0.00000755 0.0049 15B 3 01 (2007
28、)2least three places on each unit selected for this test. Ifaccessible, take one measurement on each end and one near themiddle. The average of the three measurements shall determinecompliance with the requirements.6.4 Surface FinishMake a surface-finish inspection withthe unaided eye (normal specta
29、cles acceptable).7. Conformance Criteria (see Explanatory Note 6)7.1 Any lot of wire, the samples of which comply with theconformance criteria of this section, shall be considered ascomplying with the requirements of Section 5. Individualproduction units that fail to meet one or more of the require-
30、ments shall be rejected. Failure of a sample group from a lot tomeet one or more of the following criteria shall constitutecause for rejection of the lot. The conformance criteria for eachof the prescribed properties given in Section 5 are as follows:7.1.1 ElongationThe lot shall be considered confo
31、rmingif the average elongation of the four specimens is not less thanthe appropriate elongation value in Table 1 plus 2.5 percentagepoints; however any individual production unit, the specimenfrom which has an elongation less than the appropriateelongation value in Table 1, shall be rejected.7.1.1.1
32、 The lot shall be considered to have failed to meet theelongation conformance criterion if the average of the fourspecimens is less than the elongation in Table 1 plus 2.5percentage points and elongation of any of the individualspecimens is less than the value in Table 1.7.1.1.2 If the average of th
33、e four specimens is less than theelongation in Table 1 plus 2.5 percentage points and theelongation of each of the individual specimens is equal to ormore than the value in Table 1, six additional specimens fromsix production units, other than the four originally sampledshall be tested. The lot shal
34、l be considered conforming if theelongation of each of the ten specimens is not less than theappropriate elongation value in Table 1, and the average of theten specimens is not less than that value plus 2.5 percentagepoints. The lot shall be considered to have failed to meet theelongation requiremen
35、t if any of the ten specimens is less thanthe appropriate elongation value in Table 1 or if the average ofthe ten specimens is less than that value plus 2.5 percentagepoints.7.1.2 ResistivityThe electrical resistivity of each of thefour specimens shall conform to the requirements of 5.3.Failure to m
36、eet these requirements shall constitute failure tomeet the resistivity conformance criterion.7.1.3 DimensionsThe dimensions of the first sample(Table 2) shall conform to the requirements of 5.4. If there areno failures, the lot conforms to this requirement. If there arefailures but the number of the
37、se does not exceed the allowabledefect number, c2(Table 2), for the respective number of unitsin the sample, a second sample equal to n2shall be taken andthe total defects of the n1plus n2units shall not exceed theallowable defect number, c2. Failure to meet this requirementshall constitute failure
38、to meet the dimensional conformationalcriterion.7.1.4 Surface FinishThe surface finish of the samplestaken in accordance with Table 3 shall conform to the require-ments of 5.5. The number of units in the sample showingsurface defects not consistent with commercial practice shallnot exceed the allowa
39、ble defect number, c,inTable 3. Failureto meet this requirement shall constitute failure to meet thesurface-finish conformance criterion.7.1.5 PackagingConformance to the packaging require-ments specified by the purchaser shall be determined inaccordance with Table 3. The number of units in the samp
40、leshowing nonconformance to the requirement shall not exceedthe allowable defect number, c,inTable 3. Failure to meet thisrequirement shall constitute failure to meet the packagingconformance criterion.8. Density8.1 For the purpose of calculating mass per unit length,cross-sections, etc., the densit
41、y of the copper shall be taken as8.89 g/cm3(0.32117 lb/in.3) at 20C (see Explanatory Note 7).9. Inspection9.1 General (see Explanatory Note 6)All tests and in-spections shall be made at the place of manufacture unlessagreed upon between the manufacturer and the purchaser at thetime of purchase. The
42、manufacturer shall afford the inspectorrepresenting the purchaser all reasonable facilities to satisfyhim that the material is being furnished in accordance with thisspecification.9.1.1 Unless otherwise agreed upon between the purchaserand the manufacturer, conformance of the wire to the variousrequ
43、irements listed in Section 5 shall be determined on samplestaken from each lot of wire presented for acceptance.9.1.2 The manufacturer shall, if requested prior to inspec-tion, certify that all wire in the lot was made under suchconditions that the product as a whole conforms to therequirements of t
44、his specification as determined by regularlymade and recorded tests.9.2 Inspection and Testing Terms:TABLE 2 Sampling for Dimensional MeasurementsNumber of Units in LotFirst Sample Second SampleNumber of Units inSample, n1Allowable Number ofDefects in FirstSample, c1Number of Units inSample, n2n1plu
45、s n2Allowable Number ofDefects in BothSamples, c21 to 30, incl all 0 . . .15 to 50, incl 14 0 . . .51 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 3 01 (2007)39.2.1 LotA lot is any amount of wire of one ty
46、pe and sizepresented for acceptance at one time, such amount, however,not to exceed 100 000 lb (45 000 kg) (see Explanatory Note 8).9.2.2 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 r
47、equire-ments of this specification.9.2.3 SpecimenA specimen is a length of wire removedfor test purposes from any individual production unit of thesample.9.3 Sample SizeThe number of production units in asample (see Explanatory Note 6) shall be as follows:9.3.1 For elongation and resistivity determi
48、nations, thesample shall consist of four production units. From each unit,one test specimen of sufficient length shall be removed for theperformance of the required tests.9.3.2 For dimensional measurements, the sample shall con-sist of a quantity of production units shown in Table 2 underthe heading
49、 “First Sample.”9.3.3 For surface-finish inspection and for packaging in-spection (when specified by the purchaser at the time of placingthe order) the sample shall consist of a quantity of productionunits shown in Table 3.10. Packaging and Package Marking10.1 Package sizes shall be agreed upon between the manu-facturer and the purchaser in the placing of individual orders.10.2 The wire shall be protected against damage in ordinaryhandling and shipping.11. Keywords11.1 copper electrical conductor; copper wire; electricalconductor; electrical conductorcoppe
