ASTM B246-2015 Standard Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical Purposes《电工用硬拉和中硬拉镀锡铜线的标准规格》.pdf
《ASTM B246-2015 Standard Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical Purposes《电工用硬拉和中硬拉镀锡铜线的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM B246-2015 Standard Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical Purposes《电工用硬拉和中硬拉镀锡铜线的标准规格》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B246 15Standard Specification forTinned Hard-Drawn and Medium-Hard-Drawn Copper Wirefor Electrical Purposes1This standard is issued under the fixed designation B246; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification cover
3、s tinned hard-drawn andmedium-hard-drawn round copper wire for electrical purposes.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.
4、2.1 ExceptionFor 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
5、safety and health practices and determine the applica-bility of regulatory limitations prior to use. For hazardstatement, see Sections 10 and 13.2. Referenced Documents2.1 The following documents of the issue in effect on thedate of material purchase form a part of this specification to theextent re
6、ferenced herein:2.2 ASTM Standards:2B5 Specification for High Conductivity Tough-Pitch CopperRefinery ShapesB49 Specification for Copper Rod Drawing Stock for Elec-trical PurposesB170 Specification for Oxygen-Free Electrolytic CopperRefinery ShapesB193 Test Method for Resistivity of Electrical Condu
7、ctorMaterials2.3 National Bureau of Standards:3NBS Handbook 100Copper Wire Tables3. 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 5.1 and Table 1),3.1.3 Type of copper,
8、if special (see 4.2),3.1.4 Temper (see 7.1 and Table 1),3.1.5 Package size (see 18.1),3.1.6 Special package marking, if required, and3.1.7 Place of inspection (Section 16).4. Materials4.1 The tinned wire shall be made by coating hard-drawnand medium-hard-drawn copper wire with commercially puretin (
9、see Note 1). For purposes of this specification, the tin shallbe considered commercially pure if the total of other elements,exclusive of copper, does not exceed 1 %. Notwithstanding theprevious sentence, chemical analysis of the tin coating or of thetin used for coating shall not be required under
10、this specifica-tion. Adequacy of the tin coating is ensured by the continuityof coating and adherence of coating requirements (Sections 9and 13, respectively).4.2 The copper shall be copper of such quality and puritythat the finished product shall have the properties and charac-teristics prescribed
11、in this specification.NOTE 1Specification B49 defines copper suitable for use.4.3 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. Dimensio
12、ns, Mass, and Permissible Variations5.1 The wire sizes shall be expressed as the diameter of thecoated wire in decimal fractions of an inch to the nearest0.0001 in. (0.001 mm) (Explanatory Note 5).1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the
13、direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved April 1, 2015. Published April 2015. Originallyapproved in 1951. Last previous edition approved in 2010 as B246 05 (2010).DOI: 10.1520/B0246-15.2For referenced ASTM standards, visit the AST
14、M website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from National Technical Information Service (NTIS), 5301 ShawneeRd., Alexandria, VA 22312, http
15、:/www.ntis.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 The coated wire shall not vary from the specifieddiameter by more than +3 % or 1 %.5.3 Ten percent, but not less than five coils or spools (or all,if the lot is less t
16、han five) from any lot of wire shall be takennear each end and one near the middle. If any of these selectedcoils or spools fails to conform to the requirements prescribedin 5.2, all coils or spools shall be gaged in the mannerspecified.6. Workmanship, Finish, and Appearance6.1 The tin coating shall
17、 consist of a smooth continuouslayer, firmly adhering to the surface of the copper.6.2 The wire shall be free from all imperfections notconsistent with the best commercial practice.7. Tensile Properties7.1 The tinned wire shall conform to the requirements as totensile properties prescribed in Table
18、1 (Explanatory Note 1).7.2 For wire the nominal diameter of which is more than0.001 in. (0.025 mm) greater than a size listed in Table 1, butwhich is less than that of the next larger size, the requirementsof the next larger size shall apply.7.3 Tension tests shall be made on representative samples.
19、Determine the elongation of the wire as the permanent increasein length due to the breaking of the wire in tension, measuredbetween gage marks placed originally 10 in. (250 mm) apartupon the test specimen (Explanatory Note 2).7.4 If any part of the fracture takes place outside the gagemarks or in th
20、e jaws of the testing machine, or if an examina-tion of the specimen indicates a flaw, the value obtained maynot be representative of the material. In such cases the test maybe discarded and a new test made.7.5 RetestsIf upon testing a specimen from any coil orspool of wire, the results do not confo
21、rm to the requirementsprescribed in Table 1, two additional specimens shall be tested,and the average of the three tests shall determine the accep-tance or rejection of the coil or spool.8. Resistivity8.1 Electrical resistivity shall be determined on representa-tive specimens by resistance measureme
22、nts made in accor-dance with Test Method B193. At a temperature of 20C theresistivity of coated wire shall not exceed the values prescribedin Table 2 (Explanatory Note 3).9. Continuity of Coating9.1 The continuity of coating on the wire shall be deter-mined on representative samples taken before str
23、anding orinsulating (Explanatory Note 4).TABLE 1 Tensile RequirementsTinned Medium-Hard-Drawn WireTinned Hard-Drawn Wire Tensile Strength, min.Diameter Area at 20C Tensile Strength, min.Elongationin 10 in.(250mm),%minpsi MpaElongationin 10 in.(250mm),%minin. mm cmil in.2mm2psi Mpa min. max. min. max
24、.0.2043 5.189 41738 0.03278 21.15 54100 370.6 1.7 42400 55300 290.4 378.8 1.90.1819 4.620 33088 0.02599 16.77 55100 377.4 1.6 43300 55700 296.6 381.5 1.70.1620 4.115 26244 0.02061 13.30 55900 382.9 1.4 44100 56000 302.1 383.6 1.50.1443 3.665 20822 0.01635 10.55 56700 388.4 1.3 44900 56300 307.6 385.
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