1、Designation: B227 10Standard Specification forHard-Drawn Copper-Clad Steel Wire1This standard is issued under the fixed designation B227; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parent
2、heses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers bare hard-drawn round copper-clad steel wire for electrical purposes (Note 1).NOTE 1Wire ordered to this specification is not
3、 intended for redraw-ing. If wire is desired for this purpose, consult the manufacturer.1.2 Four grades of wire are specified, designated as follows(Note 2): Grade 40 HS, Grade 40 EHS, Grade 30 HS, andGrade 30 EHS.NOTE 2The grades covered by this specification correspond to thefollowing commercial d
4、esignations:Grade 40 HS, High Strength, 40 % Conductivity.Grade 40 EHS, Extra High Strength, 40 % ConductivityGrade 30 HS, High Strength, 30 % Conductivity.Grade 30 EHS, Extra High Strength, 30 % Conductivity.1.3 The values stated in inch-pound units are to be regardedas standard. The values given i
5、n parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein.2.2 ASTM
6、Standards:2B193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 National Institute of Standards and Technology:NBS Handbook 100Copper Wire Tables33. Orderi
7、ng Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size and grade,3.1.2 Wire size: diameter in inches (see 5.1 and Table 1),3.1.3 Grade (see 1.2 and Table 1),3.1.4 Method of measuring elongation (see 7.3 and 7.4),3.1.5 Package
8、 size (see 14.1),3.1.6 Special package marking, if required (Section 13), and3.1.7 Place of inspection (Section 15).4. Material4.1 The wire shall be composed of a steel core with asubstantially uniform and continuous copper cladding thor-oughly bonded to it throughout.4.2 The finished copper-clad st
9、eel wire shall conform to therequirements prescribed in this specification.5. Dimensions and Permissible Variations5.1 The size shall be expressed as the diameter of the wirein decimal fractions of an inch using four places of decimals,that is, in tenths of mils (Note 3).NOTE 3The values of wire dia
10、meters in Table 1 are given to thenearest 0.0001 in. and correspond to the standard sizes given in Specifi-cation B258. In specifying diameters of wire or in inspecting wire, expressthe diameter to the fourth decimal place. The diameters preceded byasterisks are not in the American Wire Gage series
11、and are also given tofour places of decimals. They correspond to certain numbers of theBirmingham Wire Gage of the British Standard Wire Gage and are usedfor communication lines. The use of gage numbers in specifying wire sizesis not recognized in these specifications because of the possibility ofco
12、nfusion. An excellent discussion of wire gages and related subjects iscontained in NBS Handbook 100 of the National Institute of Standards andTechnology.35.2 Within the range of diameters included in Table 1, thewire shall not vary from the specified diameter by more thanthe following amounts rounde
13、d off to the nearest 0.1 mil(0.0001 in.):Specified Diameter,in. (mm)Permissible Variations in SpecifiedDiameter0.2043 (5.189) to 0.1000 (2.540), incl 61.5 %0.0999 (2.537) and under 61.0 %1This specification is under the jurisdiction of the ASTM Committee B01 onElectrical Conductors and is the direct
14、 responsibility of Subcommittee B01.06 onComposite Conductors.Current edition approved May 1, 2010. Published June 2010. Originallyapproved in 1948. Last previous edition approved in 2004 as B227 04. DOI:10.1520/B0227-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
15、 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 Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist
16、.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.3 Ten percent, but not less than five coils or spools (or allif the lot is less than five) from any lot of wire, shall be gagedat three places. If accessible, one gaging shall be
17、 taken neareach end and one near the middle. If any of the selected coilsor spools fail to conform to the requirements for diameter asprescribed in 5.2, all coils or spools shall be gaged in themanner specified.6. Workmanship, Finish, and Appearance6.1 The surface of the wire shall be smooth and fre
18、e fromimperfections not consistent with good commercial practice.7. Tensile Properties7.1 The wire shall conform to the tensile requirementsprescribed in Table 1 (Note 4).NOTE 4The approximate properties of hard-drawn copper-clad steelwire are shown in Table 2 for the information of the user of this
19、specification.7.2 Wire whose nominal diameter is more than 0.001 in. (1mil) (0.03 mm) greater than a size listed in Table 1 shallconform to the tensile requirements of the next larger size.7.3 Tension tests shall be made on representative samples.Unless otherwise agreed upon between the manufacturer
20、 andthe purchaser, the elongation shall be determined by measure-ments made between the jaws of the testing machine. The zerolength shall be the distance between the jaws when a load equalto 10 % of the specified tensile strength shall have beenapplied, and the final length shall be the distance bet
21、ween thejaws at the time of rupture. The zero length shall be as near 10in. (250 mm) as possible. The fracture shall be between theTABLE 1 Tensile RequirementsNominal Diameter,in.Area at 20C Tensile Strength, min, psiAcmil in.2,AGrade 40HSGrade 40EHSGrade 30HSGrade 30EHS0.2043 41 740 0.03278 108 000
22、 . . . 120 000 142 5000.1819 33 090 0.02599 113 000 . . . 125 000 150 5000.1650B27 230 0.02138 118 000 . . . 130 000 157 5000.1620 26 240 0.02061 118 000 . . . 130 000 157 5000.1443 20 820 0.01635 123 000 . . . 135 000 164 0000.1285 16 510 0.01297 128 000 . . . 140 000 170 0000.1280B16 380 0.01287 1
23、28 000 . . . 140 000 170 0000.1144 13 090 0.01028 133 000 . . . 145 000 174 1000.1040B10 820 0.008495 138 600 156 000 151 000 175 0000.1019 10 380 0.008155 138 600 . . . 151 000 179 0000.0808 6 530 0.005129 115 000 . . . 120 000 179 0000.0800B6 400 0.005027 115 000 . . . 120 000 179 0000.0640B4 096
24、0.003217 125 000 . . . 130 000 179 0000.0403 1 624 0.001276 130 000 . . . 135 000 179 0000.0390B1 521 0.001195 130 000 . . . 135 000 179 0000.0320 1 024 0.000804 135 000 161 000 145 000 179 000AMetric equivalents: 1 in. = 25.4 mm (round to four significant figures); 1 in.2= 645.16 mm2(round to four
25、significant figures); 1 psi = 6.9 kPa (round to significant figureof U.S. customary units).BThese diameters are often employed by purchasers for communication lines but are not in the American Wire Gage (B copper electricalconductor-copper-clad steel; copper-clad steel electrical con-ductor; electri
26、cal conductor; hard drawn copper-clad steel wire;steel wire-copper-cladASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of
27、any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are
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29、ived a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) o
30、f this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B227 104
