1、Designation: B869 07 (Reapproved 2013)Standard Specification forCopper-Clad Steel Electrical Conductor for CATV Drop Wire1This standard is issued under the fixed designation B869; 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.1. Scope1.1 This specification covers 21 % conductivity hard-drawnround copper-clad steel wire for coaxial cable center c
3、onduc-tors (Note 1).NOTE 1Wire ordered to this specification is not intended for redraw-ing since it is furnished in the hard-drawn temper. If wire is desired for thepurpose, the manufacturer should be consulted.1.2 The values stated in inch-pound units are to be regardedas standard. The values give
4、n in 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 thedate of material purchase, form a part of this specification tothe extent referenced herein.
5、2.2 ASTM Standards:2B193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 NIST Document:3NBS Handbook 100Copper Wire Tables3. Ordering Information3.1 Orders f
6、or 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 Package size (see 15.1);3.1.4 Special package marking, if required (Section 15); and3.1.5 Place of inspection (13.2).4. Material4.1
7、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 steel wire shall conform to therequirements in this specification.5. Dimensions and Permissible Variations5.1 The size shall be expre
8、ssed as the diameter of the wirein decimal fractions of an inch, using four places of decimals,that is, in tenths of a mil (Note 2).NOTE 2The values of wire diameters in Table 1 and Table 2 are givento the nearest 0.0001 in. (0.0025 mm) and correspond to the standard sizesgiven in Specification B258
9、. In specifying diameters of wire or inspectingwire, the diameter should also be expressed to the fourth decimal place.An excellent discussion of wire gages and related subjects is contained inNBS Handbook 100.5.2 Within the range of diameters included in Table 1, thewire shall not vary from the spe
10、cified diameter by more than61 %, expressed to the nearest 0.0001 in. (0.0025 mm).5.3 Ten percent, but not less than five reels (or all, if the lotis less than five), from any lot of wire shall be gaged. All reelsshall be gaged if any of the selected reels fail to conform to therequirements for diam
11、eter.6. Workmanship, Finish, and Appearance6.1 The surface of the wire shall be free from imperfectionsand be consistent with good commercial practice.7. Tensile and Elongation Properties7.1 The wire shall conform to a minimum tensile require-ment of 120 000 psi (827 MPa) and a minimum elongationreq
12、uirement of 1.0 %.7.2 Tension tests shall be made on representative samples.Unless otherwise agreed upon between the manufacturer 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
13、when a load equalto 10 % of the specified tensile strength has been applied, andthe final length shall be the distance between the jaws at thetime of rupture. The zero length shall be as near 10 in. (2541This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductorsand is
14、 the direct responsibility of Subcommittee B01.06 onComposite Conductors.Current edition approved April 1, 2013. Published April 2013. Originallyapproved in 1996. Last previous edition approved in 2007 as B869 07. DOI:10.1520/B0869-07R13.2For referenced ASTM standards, visit the ASTM website, www.as
15、tm.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 Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-107
16、0, http:/www.nist.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1mm) as practicable. The fracture shall be between the jaws ofthe testing machine and not closer than 1 in. (25.4 mm) toeither jaw. The elongation as thus determined
17、 shall not be lessthan 1.0 %. See Table 2 for related breaking strengths.7.3 When agreed upon between the manufacturer and thepurchaser, the elongation may be measured by means of anextensometer suitable for measuring elongation in 10 in. (250mm) and having a vernier reading to 0.01 in. (0.25 mm)att
18、ached to the test specimen at a tension load of approximately10 % of rated strength. The elongation as thus determined shallnot be less than 1.0 %. If the fracture occurs before the 1.0 %elongation requirement and outside the two attachments of theextensometer to the specimen, this sample shall be d
19、isregardedand a retest shall be performed.7.4 RetestIf, upon testing a sample from any coil or spoolof wire, the results do not conform to the tensile requirementsprescribed in 7.1 and the elongation requirements of 7.4, twoadditional samples shall be tested, and the average of the threetests shall
20、determine the acceptance or rejection of the coil orspool.NOTE 3The approximate properties of 21 % conductivity hard drawncopper-clad steel wire are shown in Table 1 for the information of the userof this specification.8. Torsion Test8.1 The wire shall withstand, without fracture, not less than20 to
21、rsions in a length equivalent to 100 times the nominaldiameter of the specimen. In the twist test, the rate of applyingthe twists shall be approximately 15/min.8.2 Specimens shall be twisted to destruction and shall notreveal under testing any seams, pits, slivers, or surface imper-fections of suffi
22、cient magnitude to indicate inherent defects orimperfections in the wire.8.2.1 Examination of the wire at the break shall show noseparation of copper from the steel.9. Resistance9.1 The electrical resistance of the wire (Note 4) shall bedetermined by resistance measurements, and maximum resis-tance
23、shall be based on the minimum diameter of the wire andresistivity value at 20C cmil/ft of 49.39. This is tocorrespond to a minimum conductivity of 21 % IACS.NOTE 4Electrical resistance is calculated by the following equation:maximum resistance /ft! 5resistivity, 3circular mil/ftminimum diameter, mil
24、!29.2 The maximum resistance values are given in Table 1.9.3 When resistance measurements are made at tempera-tures other than 20C, corrections shall be based on a tempera-ture coefficient of resistance of 0.0038/C.9.4 Tests to determine conformance to the electrical resis-tance requirements of Tabl
25、e 1 shall be made in accordance withTest Method B193.10. Uniformity of Copper Cladding10.1 At no point around the circumference of the wireshould the copper thickness be less than that shown in Table 1.The minimum copper thickness expressed as a percent of thewire size shall be 1.5 % of the wire dia
26、meter or 0.015 times thediameter. The minimum copper thickness may be determinedby direct measurements of the cross section of the wire or bymeans of a suitable electrical indicating instrument operatingon the permeameter principle. Direct measurement shall betaken from the ends of the coils for ref
27、eree purposes.11. Joints11.1 There shall be no joints of any kind made in thefinished wire.11.2 Joints may be made in the rods or semifinished wiresprior to drawing to final size in accordance with good com-mercial practice.12. Density12.1 For the purpose of calculating mass/unit length, crosssectio
28、n, and so forth, the density of the wire shall be taken as0.28807 lb/in.3(7.98 g/cm3) at 20C (see Table 2).13. Inspection13.1 Unless otherwise specified in the contract or purchaseorder, the manufacturer shall be responsible for the perfor-mance of all inspection and test requirements specified.13.2
29、 All inspections and tests shall be performed at theplace of manufacture unless otherwise especially agreed uponbetween the manufacturer and the purchaser at the time of thepurchase.TABLE 1 Properties of Hard-Drawn 21 % Conductivity Copper-Clad Steel WireNominalDiameter,in.APermissibleVariationsAMax
30、imumResistance /1000 ftat 20CMinimum CopperThickness, in.A0.0641 0.0006 in. 12.249 0.000960.0571 0.0006 in. 15.472 0.000860.0508 0.0005 in. 19.521 0.000760.0453 0.0005 in. 24.608 0.000680.0403 0.0004 in. 31.024 0.000600.0320 0.0003 in. 49.150 0.000480.0285 0.0003 in. 62.107 0.00043AMetric equivalent
31、s: 1 in. = 25.4 mm.TABLE 2 Approximate Properties (Information Only)NominalDiameter,in.AAreaRatedBreakingStrength,min, lbMass(lb/1000 ft)Mass(lb/mile)cmil in.2A0.0641 4108 0.003227 387 11.10 58.600.0571 3260 0.002560 307 9.05 47.780.0508 2580 0.002026 243 6.99 36.900.0453 2052 0.001611 193 5.56 29.3
32、60.0403 1624 0.001276 153 4.51 23.810.0320 1024 0.000804 96 2.77 14.650.0285 812 0.000637 75 2.25 11.88AMetric equivalents: 1 in. = 25.4 mm; 1 in.2= 645.16 mm2(round to four signifi-cant figures); 1 mil = 0.0254 mm (round to two decimal places).B869 07 (2013)213.3 The manufacturer shall afford the i
33、nspector represent-ing the purchaser all reasonable manufacturers facilities nec-essary to ensure that the material is being furnished inaccordance with this specification.14. Certification14.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished
34、 to thepurchaser showing that the material was manufactured,sampled, tested, and inspected in accordance with this speci-fication and has been found to meet the requirements. Whenspecified in the purchase order or contract, a report of the testresults shall be furnished.15. Packaging and Package Mar
35、king15.1 Package sizes shall be agreed upon between the manu-facturer and the purchaser in the placing of individual purchaseorders.15.2 The wire shall be protected from damage in ordinaryhandling and shipping.15.3 Each reel shall bear a tag showing the manufacturersname or trademark, size, and mini
36、mum conductivity of thematerial. If additional information is to be required on the tags,it shall be arranged with the manufacturer at the time ofpurchase.16. Keywords16.1 center conductor CATV; clad steel electrical conduc-tor; copper electrical conductor-copper-clad steel; copper-cladsteel electri
37、cal conductor; electrical conductor; hard drawncopper-clad steel wire; steel wire-copper-clad CATVASTM 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 determ
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