1、Designation: B 500/B 500M 98 (Reapproved 2002)Standard Specification forMetallic Coated Stranded Steel Core for AluminumConductors, Steel Reinforced (ACSR)1This standard is issued under the fixed designation B 500/B 500M; the number immediately following the designation indicates the yearof original
2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers 7-wire, 19-wire, 37-wire, and61-wire zin
3、c-coated (galvanized), zinc-5 % aluminum-mischmetal alloy-coated, and aluminum-coated (aluminized)stranded steel core inserted for use in aluminum conductors,steel reinforced (ACSR).1.2 The values stated in inch-pound units are to be regardedseparately as standard. The values in each system are not
4、exactequivalents; therefore, each system shall be used independentlyof the other. Combining values from the two systems mayresult in nonconformance with this specification.2. Referenced Documents2.1 ASTM Standards:B 232/B 232M Specification for Concentric-Lay-StrandedAluminum Conductors, Coated-Stee
5、l Reinforced (ACSR)2B 341/B 341M Specification for Aluminum-Coated (Alu-minized) Steel Core Wire for Aluminum Conductors, SteelReinforced (ACSR/AZ)2B 498/B 498M Specification for Zinc-Coated (Galvanized)Steel Core Wire for Aluminum Conductors, Steel Rein-forced (ACSR)2B 606 Specification for High-St
6、rength Zinc-Coated (Galva-nized) Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced2B 802/B 802M Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for AluminumConductors, Steel Reinforced (ACSR)2B 803 Specification for High-Strength Zinc-5 %Aluminu
7、m-Mischmetal Alloy-Coated Steel Core Wire forAluminum and Aluminum-Alloy Conductors, Steel Rein-forced2E 83 Practice for Verification and Classification of Exten-someter System33. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lotunless otherwise specified in the contract ororde
8、r, a lot shall consist of all coils or reels of strand of thesame diameter and unit lengths submitted for inspection at thesame time.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Length of each construction,4.1.2 Constructional d
9、escription of stranded core (for ex-ample, 7 by 0.0943 in. or 19 by 0.0977 in.) (8.1 and 8.2),4.1.3 Nominal unit length of stranded core and multiplelengths, if allowed (8.3 and Section 15),4.1.4 Coating, zinc-coated (Class A, B, or C), zinc-5 %aluminum-mischmetal-coated (Class A, B, or C), or alumi
10、num-coated (Section 5),4.1.5 Direction of lay of outer layer (Section 7),4.1.6 Packaging (Section 15), and4.1.7 Place of inspection (Section 13).5. Material5.1 The coated steel wire used in the production of thestranded core shall, prior to stranding, meet all of the require-ments of the appropriate
11、 specification that follows:5.1.1 Specification B 341/B 341M,5.1.2 Specification B 498/B 498M,5.1.3 Specification B 606,5.1.4 Specification B 802/B 802M, and5.1.5 Specification B 803.6. Joints6.1 There shall be no joints of any kind made in the finishedzinc-coated, zinc-5 % aluminum-mischmetal alloy
12、-coated, oraluminum-coated steel wires.7. Stranding7.1 The lay length of the 6-wire layer of 7 and 19-wirestranded core shall be not less than 18 or more than 30 timesthe outside diameter of the 6-wire layer. (Outside diameter isthree times nominal wire diameter.)1This specification is under the jur
13、isdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.05 onConductors of Ferrous Metals.Current edition approved Sept. 10, 1998. Published November 1998. Originallypublished as B 500 69. Last previous edition B 500 97.2Annual Book of ASTM Standa
14、rds, Vol 02.03.3Annual Book of ASTM Standards, Vol 03.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 The lay length of the 12-wire layer of a 19-wire strandedcore shall be not less than 16 nor more than 24 times theoutside di
15、ameter of the 12-wire layer. (Outside diameter is fivetimes nominal wire diameter.)7.3 The lay length of the 18-wire layer of a 37-wire strandedcore shall be not less than 14 nor more than 20 times theoutside diameter of the 18-wire layer. (Outside diameter isseven times nominal wire diameter.)7.4 T
16、he lay length of the 24-wire layer of a 61-wire strandedcore shall be not less than 14 nor more than 18 times theoutside diameter of the 24-wire layer. (Outside diameter is ninetimes nominal wire diameter.)7.5 The steel wires shall be so stranded that when thestranded core is cut the individual wire
17、s can be readilyregrouped and then held in place by one hand.7.6 For construction containing 19 or more wires, thedirection of lay will alternate with each layer.7.7 The direction of lay of the outer layer shall be asspecified by the purchaser at the time of placing the order.8. Construction and Rec
18、ommended Standard Stranded-Core Lengths8.1 Aluminum conductors, steel reinforced may be con-structed using steel core wire with any one of nine types ofprotective coatings. The acceptable core wires are galvanizedsteel core wire, coating Classes A, B, or C in accordance withSpecification B 498/B 498
19、M; high-strength galvanized steelcore wire in accordance with Specification B 606; ZN-5A1-MM coated steel core wire, coating Classes A, B, or C, inaccordance with Specification B 802/B 802M; high-strengthZN-5A4-MM coated steel core wire in accordance with Speci-fication B 803; aluminized steel core
20、wire in accordance withSpecification B 341/B 341M.8.2 The number and diameters of the steel wires shallconform to the requirements of Table 1, Construction Require-ments of Aluminum Conductors Steel-Reinforced (ACSR), ofSpecification B 232/B 232M.8.3 Recommended standard unit-stranded-core lengths a
21、regiven in Table number 5 of Specification B 232/B 232M (forthe respective steel-wire stranded-core construction and sizes).9. Length Tolerance9.1 All lengths of stranded core shall be furnished to alength tolerance of 62%.10. Tensile Properties10.1 The rated strength at 1 % extension of stranded co
22、re forACSR shall be taken as that percentage according to thenumber of wires, indicated below, of the sum of the strengthsof the steel wires, calculated from their specified nominal wirediameter and the appropriate specified minimum stress at 1 %extension given in Specifications B 341/B 341M, B 498/
23、B 498M, B 606, B 802/B 802M, or B 803:72wire strand96 % of sum of components192wire strand93 % of sum of components372wire strand91 % of sum of components612wire strand90 % of sum of components10.2 Stranded steel core samples shall sustain loads equal tothe values computed by the method of 10.1.10.3
24、 For determining compliance with the rated strength at1 % extension, use a Class B-1, B-2, or C extensometer asdescribed in Practice E 83. The gage length shall be not lessthan 20 in. (500 mm).10.4 Apply an initial load computed from Table 1. Load isequal to initial stress 3 number of wires in stran
25、d 3 (nominalwire diameter)23 0.7854. Attach the extensometer and set tothe appropriate setting from Table 1. Then increase the loaduntil the indicated total extension is 1 % (0.0100 in./in. or0.0100 mm/mm). Record the load as the strength at 1 %extension.11. Workmanship11.1 The finished stranded cor
26、e shall be uniform in diameterand shall be free from imperfections not consistent with goodcommercial stranding practice. The stranded core shall be freefrom waviness and kinks.12. Number of Tests12.1 Samples from each lot shall be taken in accordancewith Table 2. A lot shall be defined as all the p
27、ackages (reels orcoils) of the same size, construction, length, and type ofcoating offered for shipment at one time.12.2 Samples shall be tested for compliance with Sections 7and 10. Weight of zinc, zinc-5 % aluminum-mischmetal, oraluminum coating shall be determined on one wire from eachstranded sa
28、mple.13. Inspection13.1 All tests and inspection shall be made at the place offinal manufacture unless otherwise agreed upon between themanufacturer and the purchaser at the time of purchase.14. Rejection14.1 Failure of any of the test specimens to comply with therequirements of this specification s
29、hall constitute grounds forrejection of the lot represented by the specimen. The lot may beresubmitted for inspection by testing every package (reels orcoils) for the characteristic in which the specimen failed andsorting out the defective packages.15. Packaging and Package Marking15.1 Package sizes
30、 and kind of package shall be agreedupon between the manufacturer and the purchaser.15.2 When permitted by the purchaser two or more unitlengths of stranded core may be shipped on one reel. If theTABLE 1 Initial Setting for Determining Stress at 1 % ExtensionNominal Wire Diameter Initial Stress Init
31、ial Setting of Extensometerin. mm psi kgf/mm2mPa in./in. mm/mm0.05000.0899 1.2702.283 14 000 9.84 96.5 0.0005 0.00050.09000.1199 2.2863.045 28 000 19.7 193 0.0010 0.00100.12000.1899 3.0484.823 42 000 29.5 290 0.0015 0.0015B 500/B 500M 98 (2002)2multiple length is continuous, with no welds or strand
32、joints, aflag or marker shall be placed in the reel where the unit lengthends. If the multiple length on the reel consists of two or moreseparate lengths, they must not be joined. The free ends mustbe secured to the reel head, and a flag or warning marker shallbe inserted in the winding, warning of
33、the approaching end.15.3 The net weight, length or lengths, construction (7 bywire diameter, 19 by wire diameter, 37 by wire diameter, or 61by wire diameter), direction of lay of outside layer, type of wirecoating, purchase order number, ASTM Specification B 500/B 500M, and manufacturers name shall
34、be marked on a tagand attached on the outside of the package. If multiple lengthsare allowed, marking must show position and footage of eachlength and whether “continuous or“ separated lengths.16. Keywords16.1 metallic coated steel wire strand; steel core wirestrand; steel wire strandASTM Internatio
35、nal 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 any such patent rights, and the riskof infringement of such rights, are entirely their
36、 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 invited either for revision of this standard or for additional standardsand should be
37、 addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards
38、, 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) of 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).TABLE 2 Number of SamplesNo. of Packages in Lot No. of Samples1to3 all4to30 3Over 30 10 %B 500/B 500M 98 (2002)3
