1、Designation:B3304 Designation: B33 10Standard Specification forTinnedTin-Coated Soft or Annealed Copper Wire forElectrical Purposes1This standard is issued under the fixed designation B33; the number immediately following the designation indicates the year of originaladoption or, in the case of revi
2、sion, the year of last revision. A number 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 Department of Defense.1. Scope1.1This specification c
3、overs tinned, round, soft, or annealed copper wire for electrical purposes.1.2The SI values for density and resistivity are to be regarded as standard. For all other properties the inch-pound values areto be regarded as the standard and the SI units may be approximate.1.1 This specification covers t
4、in-coated, round, soft, or annealed copper wire for electrical purposes.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 standard.1.2.1 Excep
5、tionsThe SI values for density, resistivity, and volume are 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 the user of this standard to establish appropriate safety and health practices
6、and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B49 Specification for Copper Rod Drawing Stock for Electrical Purposes B193B193 Test Method for Resistivity of Electrical Conductor MaterialsB258 Specification for Nominal Diameters and C
7、ross-Sectional Areas of AWG Sizes of Solid Round Wires Used as ElectricalConductors2.2 Other Document:3NBS Handbook 100 Copper Wire Tables3. Ordering Information3.1 Orders for material under this specification shall include the following information:3.1.1 Quantity of each size,3.1.2 Wire size-diamet
8、er in inches (see 5.3 and Table 1),3.1.3 Type of copper, if special (see 4.2),3.1.4 Package size (see 10.1),3.1.5 Special packaging marking, if required, and3.1.6 Place of inspection (see 7.1).4. Material4.1 Tin for CoatingThe tin used for coating shall be commercially pure (Explanatory Note 1). For
9、 purposes of thisspecification, the tin shall be considered commercially pure if the total of other elements, exclusive of copper, does not exceed 1%.Notwithstanding the previous sentence, chemical analysis of the tin coating or of the tin used for coating shall not be required underthis specificati
10、on. Adequacy of the tin coating is assured by the continuity of coating and adherence of coating requirements (see5.4 and 5.5, respectively).1This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conduct
11、orsof Copper and Copper Alloys.Current edition approved Sept.April 1, 2004.2010. Published October 2004.May 2010. Originally approved in 1919. Last previous edition approved in 20002004 asB3300.B33 04. DOI: 10.1520/B0033-104.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or co
12、ntact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161
13、.1This document is not an ASTM standard and is intended only 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 e
14、ditions as appropriate. In all cases only the current versionof 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 States.TABLE 1 Tensile RequirementsDiameter Area at 2
15、0Cin. mm cmil in.2mm2Elongationin 10 in.(250 mm),%min0.4600 11.6840 211600.00 0.166190 107.2193 300.4600 11.684 211600 0.1662 107.0 300.4096 10.4038 167772.16 0.131768 85.0114 300.4096 10.404 167800 0.1318 85.0 300.3648 9.2659 133079.04 0.104520 67.4321 300.3648 9.266 133100 0.1045 67.4 300.3249 8.2
16、525 105560.01 0.082907 53.4880 300.3249 8.252 105600 0.08291 53.5 300.2893 7.3482 83694.49 0.065733 42.4086 250.2893 7.348 83690 0.06573 42.4 250.2576 6.5430 66357.76 0.052117 33.6240 250.2576 6.543 66360 0.05212 33.6 250.2294 5.8268 52624.36 0.041331 26.6652 250.2294 5.827 52620 0.04133 26.7 250.20
17、43 5.1892 41738.49 0.032781 21.1492 250.2043 5.189 41740 0.03278 21.2 250.1819 4.6203 33087.61 0.025987 16.7657 250.1819 4.620 33090 0.02599 16.8 250.1620 4.1148 26244.00 0.020612 13.2980 250.1620 4.115 26240 0.02061 13.3 250.1443 3.6652 20822.49 0.016354 10.5509 250.1443 3.665 20820 0.01635 10.6 25
18、0.1285 3.2639 16512.25 0.012969 8.3669 250.1285 3.264 16510 0.01297 8.37 250.1144 2.9058 13087.36 0.01027879 6.6315 250.1144 2.906 13090 0.01028 6.63 250.1019 2.5883 10383.61 0.00815527 5.2615 200.1019 2.588 10380 0.008155 5.26 200.0907 2.3038 8226.49 0.00646107 4.1684 200.0907 2.304 8230 0.00646 4.
19、17 200.0808 2.0523 6528.64 0.00512758 3.3081 200.0808 2.052 6530 0.00513 3.31 200.0720 1.8288 5184.00 0.00407150 2.6268 200.0720 1.829 5180 0.00407 2.63 200.0641 1.6281 4108.81 0.00322705 2.0820 200.0641 1.628 4110 0.00323 2.08 200.0571 1.4503 3260.41 0.00256072 1.6521 200.0571 1.450 3260 0.00256 1.
20、65 200.0508 1.2903 2580.64 0.00202683 1.3076 200.0508 1.290 2580 0.00203 1.31 200.0453 1.1506 2052.09 0.00161171 1.0398 200.0453 1.151 2050 0.00161 1.04 200.0403 1.0236 1624.09 0.00127556 0.8229 200.0403 1.024 1620 0.00128 0.823 200.0359 0.9119 1288.81 0.00101223 0.6530 200.0359 0.912 1290 0.00101 0
21、.653 200.0320 0.8128 1024.00 0.00080425 0.5189 200.0320 0.813 1020 0.000804 0.519 200.0285 0.7239 812.25 0.00063794 0.4116 200.0285 0.724 812 0.000638 0.412 200.0253 0.6426 640.09 0.00050273 0.3243 200.0253 0.643 640 0.000503 0.324 200.0226 0.5740 510.76 0.00040115 0.2588 200.0226 0.574 511 0.000401
22、 0.259 200.0201 0.5105 404.01 0.00031731 0.2047 150.0201 0.511 404 0.000317 0.205 150.0179 0.4547 320.41 0.00025165 0.1624 150.0179 0.455 320 0.000252 0.162 150.0159 0.4039 252.81 0.00019856 0.1281 150.0159 0.404 253 0.000199 0.128 150.0142 0.3607 201.64 0.00015837 0.1022 150.0142 0.361 202 0.000158
23、 0.102 150.0126 0.3200 158.76 0.00012469 0.0804 150.0126 0.320 159 0.000125 0.080 150.0113 0.2870 127.69 0.00010029 0.0647 150.0113 0.287 128 0.000100 0.065 150.0100 0.2540 100.00 0.00007854 0.0507 100.0100 0.254 100 0.0000785 0.051 100.0089 0.2261 79.21 0.00006221 0.0401 100.0089 0.226 79.2 0.00006
24、22 0.040 10B331024.2 Copper-Base MetalThe base metal shall be copper of such quality and purity that the finished product shall haveproperties and characteristics prescribed in this specification.NOTE 1Specification B49 defines copper suitable for use.4.3 Copper bars of special qualities, forms, or
25、types, as may be agreed upon between the manufacturer and the purchaser, andwhich will conform to the requirements prescribed in this specification, may also be used.5. General Requirements (See Section 8) )5.1 Tensile Strength and Elongation (Explanatory Note 2 and Note 3)The tinned wire shall conf
26、orm to the requirements forelongation prescribed in Table 1. No requirements for tensile strength are specified. For wire whose nominal diameter is more than0.001 in. (1 mil) (0.025 mm) greater than a size listed in Table 1, but less than that of the next larger size, the requirements of thenext lar
27、ger size shall apply.5.2 Resistivity (Explanatory Note 1 and Note 4)The electrical resistivity of tinned wire at a temperature of 20C shall notexceed the values prescribed in Table 2.5.3 Dimensions and Permissible Variations (Explanatory Note 2)The wire sizes shall be expressed as the diameter of th
28、e wirein decimal fractions of an inch to the nearest 0.0001 in. (0.1 mil) or in millimetres to the nearest 0.0025 mm. (0.0025 mm). Thetinnedtin-coated wire shall not vary from the specified diameter by more than the amounts prescribed in Table 3.5.4 Continuity of CoatingThe tin coating shall be cont
29、inuous. The continuity of coating on the wire shall be determined onrepresentative samples taken before stranding or insulating. The continuity of tinning shall be determined by the hydrochloricacid-sodium polysulfide test in accordance with 6.46.3.5.5 Adherence of CoatingThe tin coating shall be fi
30、rmly adherent to the surface of the copper. The adherence of coating onthe wire shall be determined on representative samples taken before stranding or insulating. The adherence of coating shall bedetermined by the wrapping and immersion test in accordance with 6.5. 6.4 for 0.0320 in. (0.813 mm) and
31、 larger sizes.5.6 JointsNecessary joints in the completed wire and in the wire and rods prior to final drawing shall be made in accordancewith the best commercial practice.5.7 FinishThe coating shall consist of a smooth continuous layer, firmly adherent to the surface of the copper. The wire shallbe
32、 free of all imperfections not consistent with the best commercial practice.6. Test Methods6.1 Tensile Strength and Elongation (Explanatory Note 5)No :6.1.1 No test for tensile strength shall be required.6.1.2 The elongation of wire whose with a nominal diameter is larger greater than 0.0808 in. (2.
33、052 mm) in diameter shall bedetermined as the permanent increase in length, expressed in percent of the original length, length due to the breaking of the wirein tension, tension. The elongation shall be measured between gage marks placed originally 10 in. (254 mm) apart upon the testspecimen and ex
34、pressed in percent of the original length.6.1.3 The elongation of wire whose with a nominal diameter is equal to or less than 0.0808 in. and under(2.053 mm) may bedetermined as described above or by measurements made between the jaws of the testing machine. When the latter method is used,measurement
35、s are made between the jaws, the zero length shall be the distance between the jaws at the start of the tension testand be as near 10 in. as practicable and the (254 mm) as practicable. The final length shall be the distance between the jaws atthe time of rupture. The fracture shall be between gage
36、marks in the case of specimens so marked or between the jaws of the testingmachine, depending on method used, and not closer than 1 in. (25.4 mm) to either gage mark or either jaw.6.2 Resistivity (Expanatory Note 4)The electrical resistivity of the material shall be determined in accordance with Tes
37、tMethod B193. The purchaser may accept certification that the wire was drawn from rod stock meeting the international standardfor annealed copper instead of resistivity tests on the finished wire.6.3Dimensional MeasurementsDimensional measurements shall be made with a micrometrer caliper equipped wi
38、th 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 near the middle. The average of the three measurements shalldetermine compliance with the require
39、ments.6.46.3 Continuity of Coating:TABLE 2 Electrical Resistivity RequirementsNominal Diameter Resistivity at 20Cin. mm Vlb/mile2Vg/m20.460 to 0.290, incl 11.7 to 7.4, incl 896.15 0.15695Under 0.290 to 0.103, incl Under 7.4 to 2.6, incl 900.77 0.15776Under 0.103 to 0.0201, incl Under 2.6 to 0.51, in
40、cl 910.15 0.15940Under 0.0201 to 0.0111 incl Under 0.51 to 0.28, incl 929.52 0.16279Under 0.0111 to 0.0030, incl Under 0.28 to 0.076, incl 939.51 0.16454B331036.4.16.3.1 Specimens:6.4.1.16.3.1.1 Length of SpecimensTest specimens shall have a length of about 6 in. (152 mm). They shall be tagged or ma
41、rked tocorrespond with the coil, spool, or reel from which they were cut.6.4.1.26.3.1.2 Treatment of SpecimensThe specimens shall be thoroughly cleaned by immersion in a suitable organic solvent suchas benzene, ether, or trichloroethylene for at least 3 min; then removed and wiped dry with a clean,
42、soft cloth (Caution-seeExplanatory Note 6). The specimens thus cleaned shall be kept wrapped in a clean, dry cloth until tested. That part of the specimento be immersed in the test solution shall not be handled. Care shall be taken to avoid abrasion by the cut ends.6.4.26.3.2 Special Solutions Requi
43、red:6.4.2.16.3.2.1 Hydrochloric Acid Solution (HCl) (sp gr 1.088)Commercial HCl (sp gr 1.12) shall be diluted with distilled water toa specific gravity of 1.088 measured at 15.6C (60F). A portion of HCl solution having a volume of 180 mL shall be consideredto be exhausted when the number of test spe
44、cimens prescribed in Table 4 of a size as indicated in 6.4.3 6.3.3 have been immersedin it for two cycles.6.4.2.26.3.2.2 Sodium Polysulfide Solution (sp gr 1.142) (Explanatory Note 7)A concentrated solution shall be made bydissolving sodium sulfide cp crystals in distilled water until the solution i
45、s saturated at about 21C (70F), and adding sufficientflowers of sulfur (in excess of 250 g/L of solution) to provide complete saturation, as shown by the presence in the solution of anexcess of sulfur after the solution has been allowed to stand for at least 24 h. The test solution shall be made by
46、diluting a portionof the concentrated solution with distilled water to a specific gravity of 1.142 1.135 to 1.145 at 15.6C (60F). The sodiumpolysulfide test solution should have sufficient strength to blacken thoroughly a piece of clean untinned copper wire in 5 s. Aportion of the The test solution
47、used for testing samples shall not be considered to be exhausted untilif it fails to blacken a pieceof clean copper as described above.6.4.36.3.3 Procedure:6.4.3.16.3.3.1 Immersion of SpecimensImmerse a length of at least 4-12 in. (114 mm) from each of the clean specimens, inaccordance with the foll
48、owing cycles, in test solutions maintained at a temperature between 15.6 and 21C (60 and 70F): (1)Immerse the specimen for 1 min in the HCl solution described in 6.4.26.3.2, wash, and wipe dry; (2) immerse the specimen for30 s in the sodium polysulfide solution described in 6.4.26.3.2, wash, and wip
49、e dry; (3) immerse the specimen for 1 min in theHCl solution, wash, and dry; (4) immerse the specimen for 30 s in the sodium polysulfide solution, wash, and wipe dry.6.4.3.26.3.3.2 Washing SpecimensAfter each immersion, immediately wash the specimens thoroughly in clean water and wipe drywith a clean, soft cloth.6.4.3.36.3.3.3 Examination of SpecimensAfter immersion and washing, examine the specimens to ascertain if copper exposedthrough openings in the tin coating has been blackened by action of the sodium polysulfide. The specimens shall be con
