1、Designation: B2 13 (Reapproved 2018)Standard Specification forMedium-Hard-Drawn Copper Wire1This standard is issued under the fixed designation B2; 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 medium-hard-drawn roundcopper
3、 wire for electrical purposes (see Explanatory Note 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 density, re
4、sistivity 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, and environm
5、ental 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 International Standards,
6、 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 Standards:2B49 Sp
7、ecification 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 Documents:NBS Handbook 100 Copper Wire
8、 Tables of the NationalBureau of Standards33. 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 (see Section 4);3.1.4 Packa
9、ge size (see 10.1);3.1.5 Special package marking, if required; and3.1.6 Place of inspection (Section 7).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
10、 B49 defines copper suitable 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
11、Strength and ElongationThe wire shall con-form to the requirements as to tensile properties prescribed inTable 1 (Explanatory Note 3 and Note 4). For wire whosenominal diameter is more than 0.001 in. (0.025 mm) greaterthan a size listed in Table 1, but which is less than that of thenext larger size,
12、 the requirements of the next larger size shallapply.5.1.1 Tests on a specimen containing a joint shall show atleast 95 % of the minimum tensile strength given in Table 1.Elongation tests shall not be made on a specimen containing ajoint.5.2 ResisitivityElectrical resistivity at 20C shall not ex-cee
13、d the following values (see Explanatory Note 5):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 Oct. 1, 2018. Published October 2018.
14、Originallyapproved in 1912. Last previous edition approved in 2013 as B2 13. DOI:10.1520/B0002-13R18.2For 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 D
15、ocument 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 StatesTh
16、is international 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 (
17、TBT) Committee.1Nominal Diameter, in. Resistivity at 20C,lb/mile2g/m20.460 to 0.325 (11.684 to 8.255 mm), incl 896.15 0.15694Under 0.325 to 0.0403 (8.255 to 1.024 mm), incl 905.44 0.158575.3 Dimensions and Permissible VariationsWithin therange of diameters included in Table 1 the wire shall not vary
18、from the specified diameter by more than 61 %, expressed tothe nearest 0.0001 in. (0.001 mm) (see Explanatory Note 2).5.4 JointsNo joints shall be made in the completed wire(Explanatory Note 7). Joints in wire and rods, prior to finaldrawing, shall be made in accordance with the best commercialpract
19、ice and shall conform to the requirements prescribed in5.1.5.5 FinishThe wire shall be free of all imperfections notconsistent with the best commercial practice.6. Test Methods6.1 Tensile Strength and Elongation:6.1.1 Obtain the tensile strength, expressed in pounds persquare inch, by dividing the m
20、aximum load carried by thespecimen during the tension test, by the original cross-sectionalarea of the specimen. Tensile strength and elongation may bedetermined simultaneously on the same specimen (see Ex-planatory Note 4).6.1.2 Determine the elongation of the wire as the permanentincrease in lengt
21、h due to the breaking of the wire in tension,measured between gage marks placed originally 10 in. (250mm) apart upon the test specimen.6.1.3 If any part of the fracture takes place outside the gagemarks or in the jaws of the testing machine, or if an examina-tion of the specimen indicates a flaw, th
22、e value obtained maynot be representative of the material. In such cases the test maybe discarded and a new test made.6.2 ResistivityDetermine the electrical resistivity of thematerial in accordance with Test Method B193 (see Explana-tory Note 5). The purchaser may accept certification that thewire
23、was drawn from rod stock meeting the InternationalStandard forAnnealed Copper instead of resistivity tests on thefinished wire.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 b
24、e made on at least three places on each unit selected forthis test. If 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 unai
25、ded eye (normal spectacles accepted).7. Inspection7.1 General (Explanatory Note 8 and Note 9)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
26、 made at the place ofmanufacture unless otherwise especially agreed 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 fu
27、rnished in accordancewith this specification.7.1.3 Unless otherwise 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.TABLE 1 Tensile Require
28、mentsDiameter Area at 20C Tensile Strength Elongation, min,% in 10-in.(250 mm)in. mm cmil in.2mm2psi MPaMin Max Min Max0.4600 11.684 211 600 0.1662 107.0 42 000 49 000 290 340 3.80.4096 10.404 167 800 0.1318 85.0 43 000 50 000 295 345 3.60.3648 9.266 133 100 0.1045 67.4 44 000 51 000 305 350 3.20.32
29、49 8.252 105 600 0.08291 53.5 45 000 52 000 310 360 3.00.2893 7.348 83 690 0.06573 42.4 46 000 53 000 315 365 2.80.2576 6.543 66 360 0.05212 33.6 47 000 54 000 325 370 2.50.2294 5.827 52 620 0.04133 26.7 48 000 55 000 330 380 2.20.2043 5.189 41 740 0.03278 21.2 48 330 55 330 335 380 1.90.1819 4.620
30、33 090 0.02599 16.8 48 660 55 660 335 385 1.70.1620 4.115 26 240 0.02061 13.3 49 000 56 000 340 385 1.50.1443 3.665 20 820 0.01635 10.5 49 330 56 330 340 390 1.40.1285 3.264 16 510 0.01297 8.37 49 660 56 660 340 390 1.30.1144 2.906 13 090 0.01028 6.63 50 000 57 000 345 395 1.30.1019 2.588 10 380 0.0
31、0816 5.26 50 330 57 330 345 395 1.20.0907 2.304 8 230 0.00646 4.17 50 660 57 600 350 400 1.20.0808 2.052 6 530 0.00513 3.31 51 000 58 000 350 400 1.10.0720 1.829 5 180 0.00407 2.63 51 330 58 330 355 400 1.10.0641 1.628 4 110 0.00323 2.08 51 660 58 660 355 405 1.00.0571 1.450 3 260 0.00256 1.65 52 00
32、0 59 000 360 405 1.00.0508 1.290 2 580 0.00203 1.31 52 330 59 330 360 410 1.00.0453 1.151 2 050 0.00161 1.04 52 660 59 660 365 410 1.00.0403 1.024 1 620 0.00128 0.823 53 000 60 000 365 415 1.0B2 13 (2018)27.1.4 The manufacturer shall, if requested prior toinspection, certify that all wire in the lot
33、 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 9)any amount of wire of onetype and size presented for acceptance at one
34、 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 purpo
35、se 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 8)The number ofproduction units in a sample shall be as follows:7.3.1 For elong
36、ation 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 show
37、n 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 Note 8)
38、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 lot tom
39、eet 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 Tensile and ElongationThe lot shall be consideredconforming if the tensile and elongation of each of the sel
40、ectedspecimens is not less than the value in Table 1.8.1.1.1 RetestsIf, upon testing a sample from any coil orspool of wire, the results do not conform to the requirementsprescribed in Table 1, two additional samples shall be testedand the average of the three tests shall determine the accep-tance o
41、r rejection of the coil or spool.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 the first samp
42、le(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 equal to n2shal
43、l 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 3 shall con
44、form to the require-ments of 5.5. The number of units in the sample showingsurface defects not consistent with commercial practice shallnot exceed the allowable defect number, c,inTable 3. Failureto meet this requirement shall constitute failure to meet thesurface-finish conformance criterion.8.1.5
45、PackagingConformance to the packaging require-ments specified by the purchaser shall be determined inaccordance with Table 3. The number of units in the sampleshowing nonconformance to the requirement shall not exceedthe allowable defect number, c,inTable 3. Failure to meet thisrequirement shall con
46、stitute failure to meet the packagingconformance criterion.9. Density9.1 For the purpose of calculating mass per unit length,cross-sections, etc., the density of the copper shall be taken as8.89 g/cm3(0.32117 lb/in.3) at 20C (see Explanatory Note 6).TABLE 2 Sampling for Dimensional MeasurementsNumbe
47、r of Unitsin LotFirst Sample Second SampleNumber of Units inSample, n1Allowable Number ofDefects in FirstSample, c1Number of Units inSample, n2n1plus n2Allowable Number of Defects in Both Samples, c21 to 14, incl all 0 . . .15 to 50, incl 14 0 . . .51 to 100, incl 19 0 23 42 1101 to 200, incl 24 0 4
48、6 70 2201 to 400, incl 29 0 76 105 3401 to 800, incl 33 0 112 145 4Over 800 34 0 116 150 4TABLE 3 Sampling for Surface Finish and Packaging InspectionNumber of Units inLotNumber of Units inSample, nAllowable Number ofDefective Units, c1 to 30, incl all 031 to 50, incl 30 051 to 100, incl 37 0101 to
49、200, incl 40 0201 to 300, incl 70 1301 to 500, incl 100 2501 to 800, incl 130 3Over 800 155 4B2 13 (2018)310. 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 wire; medium-hard copper wire; round copperelectrical wire; round copper wireEXPLANATORY NOTESNOTE 1Medium-hard drawn wire approaches hard-drawn wire in itscharacteristics, but from the ver
