1、Designation: B2 121B2 13Standard 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.Anumber in parenthese
2、s indicates the year of last reapproval.Asuperscriptepsilon () 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 NOTEFootnote 3 was editorially updated in February 2013.1. Scope1.1 This specification
3、 covers medium-hard-drawn round copper wire for electrical purposes (see Explanatory Note 1).1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered
4、 standard.1.2.1 ExceptionThe SI values of density and resistivityFor density, resistivity and temperature, the values stated in SI unitsare to be regarded as standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof
5、 the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on date of material purchase at the time of reference form a part of thisspe
6、cification to the extent referenced herein:2.2 ASTM Standards:2B5 Specification for High Conductivity Tough-Pitch Copper Refinery ShapesB49 Specification for Copper Rod Drawing Stock for Electrical PurposesB170 Specification for Oxygen-Free Electrolytic CopperRefinery ShapesB193 Test Method for Resi
7、stivity of Electrical Conductor MaterialsB258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as ElectricalConductors2.3 Other DocumentsDocuments:NBS Handbook 100 Copper Wire Tables of the National Bureau of Standards33. Ordering Information3.1 Or
8、ders for material under this specification shouldshall include the following information:3.1.1 Quantity of each size;3.1.2 Wire size: diameter in inches (see 5.15.3 and Table 1);3.1.3 Type of copper, if special (see Section 4);3.1.4 Package size (see 11.110.1);3.1.5 Special package marking, if requi
9、red; and3.1.6 Place of inspection (Section 107).1 This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductorsof Copper and Copper Alloys.Current edition approved Nov. 15, 2012Oct. 1, 2013. Published
10、 November 2012October 2013. Originally approved in 1912. Last previous edition approved in 20082012as B2 08.B2 121. DOI: 10.1520/B0002-12E01.10.1520/B0002-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of AS
11、TM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.This document is not an ASTM standard and is intended on
12、ly to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current vers
13、ionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Materials and Manufacture4.1 The material shall be copper of such quality and purity that the finishe
14、d product shall have the properties and characteristicsprescribed in this specification.NOTE 1SpecificationsSpecification B5, B49, and defines B170 define the materials copper suitable for use.4.2 Copper bars of special qualities, forms, or types, as may be agreed upon between the manufacturer and t
15、he purchaser, andwhich will conform to the requirements prescribed in this specification, may also be used.5. Dimensions and Permissible Variations5.1 The wire sizes shall be expressed as the diameter of the wire in decimal fractions of an inch to the nearest 0.0001 in. (0.1mil) or in millimetres to
16、 the nearest 0.001 mm (Explanatory Note 2).5.2 Within the range of diameters included in Table 1 the wire shall not vary from the specified diameter by more than 61 %,expressed to the nearest 0.0001 in. (0.1 mil) 0.001 mm.5.3 Ten percent, but not less than five coils or spools (or all if the lot is
17、less than five) from any lot of wire shall be gaged atthree places. If accessible, one gaging shall be taken near each end and one near the middle. If any of the selected coils or spoolsfails to conform to the requirements prescribed in 5.2, all coils or spools shall be gaged in the manner specified
18、.5. General Requirements (see Section 8)5.1 Tensile Strength and ElongationThe wire shall conform to the requirements as to tensile properties prescribed in Table1 (Explanatory Note 3 and Note 4). For wire whose nominal diameter is more than 0.001 in. (0.025 mm) greater than a size listedin Table 1,
19、 but which is less than that of the next larger size, the requirements of the next larger size shall apply.5.1.1 Tests on a specimen containing a joint shall show at least 95 % of the minimum tensile strength given in Table 1.Elongation tests shall not be made on a specimen containing a joint.5.2 Re
20、sisitivityElectrical resistivity at 20C shall not exceed the following values (see Explanatory Note 5):Nominal Diameter, in. Resistivity at 20C,lb/mile 2 g/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 Permi
21、ssible VariationsWithin the range of diameters included in Table 1 the wire shall not vary from thespecified diameter by more than 61 %, expressed to the 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 wir
22、e and rods, prior to final drawing,shall be made in accordance with the best commercial practice and shall conform to the requirements prescribed in 5.1.5.5 FinishThe wire shall be free of all imperfections not consistent with the best commercial practice.TABLE 1 Tensile RequirementsDiameter Area at
23、 20C Tensile Strength Elongation, min,%in % in 10-in.(250 mm)in. mm cmil in.2 mm2 psi 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 3.20.3249 8.252 105 60
24、0 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 33 090 0.02599
25、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 0.00816 5.26 50 33
26、0 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 52 000 59 000 360 40
27、5 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 1326. Workmanship, Finish, and Appearance6.1 The wire shall be free from all imperfections not consistent with the best
28、commercial practice.6. Test Methods6.1 Tensile Strength and Elongation:6.1.1 Obtain the tensile strength, expressed in pounds per square inch, by dividing the maximum load carried by the specimenduring the tension test, by the original cross-sectional area of the specimen. Tensile strength and elong
29、ation may be determinedsimultaneously on the same specimen (see Explanatory Note 4).6.1.2 Determine the elongation of the wire as the permanent increase in length due to the breaking of the wire in tension,measured between gage marks placed originally 10 in. (250 mm) apart upon the test specimen.6.1
30、.3 If any part of the fracture takes place outside the gage marks or in the jaws of the testing machine, or if an examinationof the specimen indicates a flaw, the value obtained may not be representative of the material. In such cases the test may bediscarded and a new test made.6.2 ResistivityDeter
31、mine the electrical resistivity of the material in accordance with Test Method B193 (see Explanatory Note5). The purchaser may accept certification that the wire was drawn from rod stock meeting the International Standard forAnnealedCopper instead of resistivity tests on the finished wire.6.3 Dimens
32、ional MeasurementsDimensional measurements shall be made with a micrometer caliper equipped with a verniergraduated in 0.0001 in. (0.0025 mm). Measurements shall be made on at least three places on each unit selected for this test. Ifaccessible, one measurement shall be taken on each end and one nea
33、r the middle. The average of the three measurements shalldetermine compliance with the requirements.6.4 Surface FinishMake a surface-finish inspection with the unaided eye (normal spectacles accepted).7. Tensile Properties7.1 The wire shall conform to the requirements as to tensile properties prescr
34、ibed in Table 1 (Explanatory Note 3 and Note 4).7.2 Tests on a specimen containing a joint shall show at least 95 % of the minimum tensile strength given in Table 1. Elongationtests shall not be made on a specimen containing a joint.7.3 For wire the nominal diameter of which is more than 0.001 in. (
35、1 mil) (0.025 mm) greater than a size listed in Table 1, butwhich is less than that of the next larger size, the requirements of the next larger size shall apply.7.4 Determine the elongation of the wire as the permanent increase in length due to the breaking of the wire in tension, measuredbetween g
36、age marks placed originally 10 in. (254 mm) apart upon the test specimen (Explanatory Note 4).7.5 If any part of the fracture takes place outside the gage marks or in the jaws of the testing machine, or if an examination ofthe specimen indicates a flaw, the value obtained may not be representative o
37、f the material. In such cases the test may be discardedand a new test made.7.6 RetestsIf, upon testing a sample from any coil or spool of wire, the results do not conform to the requirements prescribedin Table 1, two additional samples shall be tested and the average of the three tests shall determi
38、ne the acceptance or rejection ofthe coil or spool.8. Resistivity8.1 Electrical resistivity shall be determined on representative samples by resistance measurements (Explanatory Note 5 andNote 6). At a temperature of 20C the resistivity shall not exceed the following values:Nominal Diameter, in. Res
39、istivity at 20C,lb/mile 2 g/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 0.158578.2 Tests to determine conformance to the electrical resistance requirements shall be made in accordance with Test MethodB193.9. Joints9.1 No joints sha
40、ll be made in the completed wire (Explanatory Note 7). Joints in wire and rods, prior to final drawing, shallbe made in accordance with the best commercial practice and shall conform to the requirements prescribed in 7.2.7. Inspection10.1 Unless otherwise specified in the contract or purchase order,
41、 the manufacturer shall be responsible for the performance ofall inspection and test requirements specified (Explanatory Note 8).10.2 All inspections and tests shall be made at the place of manufacture unless otherwise especially agreed to between themanufacturer and the purchaser at the time of the
42、 purchase.B2 13310.3 The manufacturer shall afford the inspector representing the purchaser all reasonable manufacturers facilities to satisfythat the material is being furnished in accordance with this specification.10.4 Unless otherwise agreed upon between the purchaser and the manufacturer, confo
43、rmance of the wire to the variousrequirements listed in this specification shall be determined on samples taken from each lot of wire presented for acceptance.7.1 General (Explanatory Note 8 and Note 9)The manufacturer shall, if requested prior to inspection, certify that all wire inthe lot was made
44、 under such conditions that the product as a whole conforms to the requirements of this specification as determinedby regularly made and recorded tests.Unless otherwise specified in the contract or purchase order, the manufacturer shall beresponsible for the performance of all inspection and test re
45、quirements specified.7.1.1 All inspections and tests shall be made at the place of manufacture unless otherwise especially agreed upon between themanufacturer and the purchaser at the time of purchase.7.1.2 The manufacturer shall afford the inspector representing the purchaser all reasonable manufac
46、turers facilities to satisfyhim that the material is being furnished in accordance with this specification.7.1.3 Unless otherwise agreed upon between the purchaser and the manufacturer, conformance of the wire to the variousrequirements listed in Section 5 shall be determined on samples taken from e
47、ach lot of wire presented for acceptance.7.1.4 The manufacturer shall, if requested prior to inspection, certify that all wire in the lot was made under such conditionsthat the product as a whole conforms to the requirements of this specification as determined by regularly made and recorded tests.7.
48、2 Inspection and Testing Terms:Definitions Applicable to Inspection:7.2.1 Lotlot (Explanatory Note 9)Alot is any amount of wire of one type and size presented for acceptance at one time;time,such amount, however, not to exceed 100 000 lb or 45 000 kg (Explanatory (45 000 kg).Note 9).7.2.2 unit(s)coi
49、l(s), reel(s), or other put-up method which makes up the lot from a production unit of one size of wire.7.2.3 SamplesampleA sample is a quantity of production units (coils, reels, and so forth) selected at random from the lotfor the purpose of determining conformance of the lot to the requirements of this specification.7.2.4 SpecimenspecimenA specimen is a length of wire removed for test purposes from any individual production unit ofthe sample.7.3 Sample SizeSize (Explanatory Note 8)The number of production units in a sample (Explana
