1、Designation: B3 13 (Reapproved 2018)Standard Specification forSoft or Annealed Copper Wire1This standard is issued under the fixed designation B3; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers drawn and annealed or softroun
3、d bare copper wire for electrical purposes (see ExplanatoryNote 1).1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 ExceptionFor
4、 density, resistivity and temperature,the values stated in SI units are to be regarded as standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health,
5、and environmental practices and deter-mine the applicability 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 theDevelopment of Internationa
6、l 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 extentreferenced herein:2.2 ASTM Stand
7、ards:2B49 Specification for Copper Rod for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Standard Nominal Diameters andCross-Sectional Areas of AWG Sizes of Solid RoundWires Used as Electrical Conductors2.3 Other Standards:NBS Handbook 100
8、 Copper Wire Tables33. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size,3.1.2 Wire size: diameter in inches (see 5.3 and Table 1),3.1.3 Type of copper, if special (Section 4),3.1.4 Package size (see 10.1),3.1.5 Sp
9、ecial package marking, if required, and3.1.6 Place of inspection (see 7.1).4. Materials4.1 The material shall be copper of such quality and puritythat the finished product shall have the properties and charac-teristics prescribed in this specification.NOTE 1Specification B49 defines copper suitable
10、for use.4.2 Copper bars of special qualities, forms, or types, as maybe agreed upon between the manufacturer and the purchaser,and which will conform to the requirements prescribed in thisspecification may also be used.5. General Requirements (see Section 8)5.1 Tensile Strength and ElongationThe wir
11、e shall con-form to the requirements for elongation prescribed in Table 1(see Explanatory Note 2). 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
12、 requirements of thenext larger size shall apply.5.2 ResistivityThe electrical resistivity at 20C shall notexceed 875.20 lb/mile2(0.15328 g/m2) (see ExplanatoryNote 5).5.3 Dimensions and Permissible VariationsThe wire sizesshall be expressed as the diameter of the wire in decimalfractions of an inch
13、 to the nearest 0.0001 in. (or 0.001 mm) (see1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductorsand is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Oct. 1, 2018. Published October 2018. Orig
14、inallyapproved in 1912. Last previous edition approved in 2013 as B3 13. DOI:10.1520/B0003-13R18.2For 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 Docum
15、ent Summary page onthe ASTM website.3Available from National Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis i
16、nternational standard was developed in accordance with internationally recognized principles on standardization 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)
17、 Committee.1Explanatory Note 3). For diameters under 0.0100 in. (0.254mm), the wire shall not vary from the specified diameter bymore than plus and minus 0.0001 in. (0.0025 mm), and fordiameters of 0.0100 in. (0.254 mm) and over the wire shall notvary from the specified diameter by more than plus an
18、d minus1 %, expressed to the nearest 0.0001 in. (or 0.001 mm).5.4 JointsNecessary joints in the completed wire and inthe wire and rods prior to final drawing shall be made inaccordance with the best commercial practice.5.5 FinishThe wire shall be free of all imperfections notconsistent with the best
19、 commercial practice.6. Test Methods6.1 Tensile Strength and ElongationNo test for tensilestrength shall be required.6.1.1 The elongation of wire with a nominal diametergreater than 0.0808 in. (2.052 mm) shall be determined as thepermanent increase in length due to the breaking of the wire intension
20、 (see Explanatory Note 4). The elongation shall bemeasured between gage marks placed originally 10 in. (242mm) apart upon the test specimen and expressed in percent ofthe original length.6.1.2 The elongation of wire with a nominal diameter equalto or less than 0.0808 in. (2.053 mm) may be determined
21、 asdescribed above or by measurements made between the jaws ofthe testing machine. When measurements are made betweenthe jaws, the zero length shall be the distance between the jawsat the start of the tension test and be as near 10 in. (254 mm)as practicable. The final length shall be the distance b
22、etweenthe jaws at the time of rupture. The fracture shall be betweengage marks or jaws of the testing machine, depending onmethod used, and not closer than 1 in. (25.4 mm) to either gagemark or jaw.6.2 ResistivityDetermine the electrical resistivity of thematerial in accordance with Test Method B193
23、 (ExplanatoryNote 5). The purchaser may accept certification that the wireTABLE 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 0.1318 85.0 350.3648 9.266 133 100 0.1045 67.4 350.3249 8.252 105
24、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 13.3 300.1443 3.665 20 820 0.01635 10.5 300.1285 3.264 16 510 0.01297 8.37 300
25、.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 1.65 250.0508 1.290 2 580 0.00203 1.31 250.0453 1.151 2 050 0.00161
26、 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 0.000317 0.205 200.0179 0.455 320 0.000252 0.162 200.0159 0.404 253
27、 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 0.180 50.4 0.0000396 0.026 150.0063 0.160 39.7 0.0000312 0.020 150
28、.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 15B3 13 (2018)2was drawn from stock meeting the International Standard forAnneale
29、d Copper instead of resistivity tests on the finishedwire.6.3 Dimensional MeasurementsDimensional measure-ments shall be made with a micrometer caliper equipped witha vernier graduated in 0.0001 in. (0.0025 mm). Measurementsshall be made on at least three places on each unit selected forthis test. I
30、f accessible, one measurement shall be taken on eachend and one near the middle. The average of the threemeasurements shall determine compliance with the require-ments.6.4 Surface FinishMake a surface-finish inspection withthe unaided eye (normal spectacles acceptable).7. Inspection7.1 General (Expl
31、anatory Note 6 and Note 7)Unlessotherwise specified in the contract or purchase order, themanufacturer shall be responsible for the performance of allinspection and test requirements specified.7.1.1 All inspections and tests shall be made at the place ofmanufacture unless otherwise especially agreed
32、 upon betweenthe manufacturer and the purchaser at the time of purchase.7.1.2 The manufacturer shall afford the inspector represent-ing the purchaser all reasonable manufacturers facilities tosatisfy him that the material is being furnished in accordancewith this specification.7.1.3 Unless otherwise
33、 agreed upon between the purchaserand the manufacturer, conformance of the wire to the variousrequirements listed in Section 5 shall be determined on samplestaken from each lot of wire presented for acceptance.7.1.4 The manufacturer shall, if requested prior toinspection, certify that all wire in th
34、e lot was made under suchconditions that the product as a whole conforms to therequirements of this specification as determined by regularlymade and recorded tests.7.2 Definitions Applicable to Inspection:7.2.1 lot (Explanatory Note 7)any amount of wire of onetype and size presented for acceptance a
35、t one time, suchamount, however, not to exceed 100 000 lb (45 000 kg).7.2.2 unit(s)coil(s), reel(s), or other put-up method whichmakes up the lot from a production unit of one size of wire.7.2.3 samplea quantity of production units (coils, reels,and so forth) selected at random from the lot for the
36、purpose ofdetermining conformance of the lot to the requirements of thisspecification.7.2.4 specimena length of wire removed for test purposesfrom any individual production unit of the sample.7.3 sample size (Explanatory Note 6)The number ofproduction units in a sample shall be as follows:7.3.1 For
37、elongation and resistivity determinations, 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.7.3.2 For dimensional measurements, the sample shall con-sist of a quantity of production units
38、 shown in Table 2 underthe heading “First Sample.”7.3.3 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 3.8. Conformance Criteria (see Explanatory No
39、te 6)8.1 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-ments shall be rejected. Failure of a sample group from a lo
40、t 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:8.1.1 ElongationThe lot shall be considered conforming ifthe elongation of each of the selected specimens is
41、not less thanthe elongation value in Table 1.8.1.2 ResistivityThe electrical resistivity of each of thefour specimens shall conform to the requirements of 5.2.Failure to meet these requirements shall constitute failure tomeet the resistivity conformance criterion.8.1.3 DimensionsThe dimensions of th
42、e first sample(Table 2) shall conform to the requirements of 5.3. If there areno failures, the lot conforms to this requirement. If there arefailures but the number of these does not exceed the allowabledefect number, c2(Table 2), for the respective number of unitsin the sample, a second sample equa
43、l 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 to meet the dimensional conformancecriterion.8.1.4 Surface FinishThe surface finish of the samplestaken in accordance with Table
44、3 shall conform to the require-ments of 5.5. The number of units in the sample showingTABLE 2 Sampling for Dimensional MeasurementsNumber of Unitsin LotFirst Sample Second SampleNumber of Units inSample, n1Allowable Number ofDefects in FirstSample, c1Number of Units inSample, n2n1plus n2Allowable Nu
45、mber 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 4B3 13 (2018)3surface defects not consistent with commercial practice shallno
46、t exceed the allowable defect number, c,inTable 3. Failureto meet this requirement shall constitute failure to meet thesurface-finish conformance criterion.8.1.5 PackagingConformance to the packaging require-ments specified by the purchaser shall be determined inaccordance with Table 3. The number o
47、f units in the sampleshowing 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.9. Density9.1 For the purpose of calculating mass per unit length,cross-section
48、s, etc., the density of the copper shall be taken as8.89 g/cm3(0.32117 lb/in.3) at 20C (see Explanatory Note 8).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 ag
49、ainst damage in ordinaryhandling and shipping.11. Keywords11.1 copper electrical conductor; copper wire; electricalconductor; electrical conductorcopper; soft or annealed cop-per wireEXPLANATORY NOTESNOTE 1Soft or annealed copper wire is wire which has been drawn tosize by customary operations and then annealed. When necessary it isfinished by cleaning to remove scale or oxide. The wire is soft and ductile,easily marred, and even stretched by careless handling. It is thereforenecessary that the requirements of this specification relating to elonga
