1、Designation:B500/B500M10 Designation: B500/B500M 12Standard Specification forMetallic Coated or Aluminum Clad Stranded Steel Core forUse in Overhead Electrical Conductors1This standard is issued under the fixed designation B500/B500M; the number immediately following the designation indicates the ye
2、arof original 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 () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers 7-wire, 19-wire, 37-wire, a
3、nd 61-wire zinc-coated (galvanized), zinc-5 % aluminum-mischmetalalloy-coated or aluminum clad stranded steel core intended for use in overhead electrical conductors.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsyste
4、m may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for U
5、se in Overhead Electrical ConductorsB957 Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core Wire for OverheadElectrical ConductorsB958 Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc5% Aluminum-Mischmetal Alloy-CoatedSteel Cor
6、e Wire for Use in Overhead Electrical ConductorsB606 Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Aluminum and Aluminum-AlloyConductors, Steel ReinforcedB802/B802M Specification for Zinc5 %Aluminum-MischmetalAlloy-Coated Steel Core Wire forAluminum Conductors, SteelRe
7、inforced (ACSR)B803 Specification for High-Strength Zinc5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in OverheadElectrical ConductorsE83 Practice for Verification and Classification of Extensometer Systems Practice for Verification and Classification ofExtensometer SystemsB502 Specif
8、ication for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lotunless otherwise specified in the contract or order, a lot shall consist of all coils or reels of strand of the same diameterand unit
9、lengths submitted for inspection at the same time.3.1.2 production lotall of the wire spools loaded into a stranding machine that are used to produce a completed strand cable.4. Ordering Information4.1 Orders for material under this specification shall include the following information:4.1.1 Length
10、of each construction,4.1.2 Constructional description of stranded core (for example, 7 3 0.0943 in. or 19 3 0.0977 in.) (8.1 and 8.2),4.1.3 The multiple length of stranded core and the total number of multiple lengths per reel, if allowed (8.3 and Section 15),4.1.4Strength and coating type (Section4
11、.1.4 Strength and coating type or aluminum clad (Section 8),4.1.5 Direction of lay of outer layer (Section 7),1This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on Conductorsof Ferrous Metals.Current ed
12、ition approved Oct.April 1, 2010.2012. Published November 2010.May 2012. Originally approved in 1969. Last previous edition approved in 20092010 asB500/B500M 109. DOI: 10.1520/B0500_B0500M-102.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at s
13、erviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.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 versi
14、on. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes secti
15、on appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.6 Packaging (Section 15), and4.1.7 Place of inspection (Section 13).5. Material5.1 The coated or aluminum clad steel wire used in the productio
16、n of the stranded core shall, prior to stranding, meet all of therequirements of the appropriate specification that follows:5.1.1 Specification B498/B498M,5.1.2 Specification B606,5.1.3 Specification B802/B802M, and5.1.4 Specification B803.5.1.5 Specification B957.5.1.6 Specification B958.5.1.7 Spec
17、ification B502.6. Joints6.1 There shall be no joints of any kind made in the finished zinc-coated, zinc-5 % aluminum-mischmetal alloy-coated oraluminum clad steel wires.7. Stranding7.1 The lay length of the 6-wire layer of 7 and 19-wire stranded core shall be not less than 16 or more than 26 times t
18、he outsidediameter of the 6-wire layer. (Outside diameter is three times nominal wire diameter.)7.2 The lay length of the 12-wire layer of a 19-wire stranded core shall be not less than 14 or more than 22 times the outsidediameter of the 12-wire layer. (Outside diameter is five times nominal wire di
19、ameter.)7.3 The lay length of the 18-wire layer of a 37-wire stranded core shall be not less than 14 or more than 20 times the outsidediameter of the 18-wire layer. (Outside diameter is seven times nominal wire diameter.)7.4 The lay length of the 24-wire layer of a 61-wire stranded core shall be not
20、 less than 14 or more than 18 times the outsidediameter of the 24-wire layer. (Outside diameter is nine times nominal wire diameter.)7.5 The steel wires shall be so stranded that when the stranded core is cut the individual wires can be readily regrouped andthen held in place by one hand.7.6 For con
21、struction containing 19 or more wires, the direction of lay will alternate with each layer.7.7 The direction of lay of the outer layer shall be as specified by the purchaser at the time of placing the order.8. Construction and Recommended Standard Stranded-Core Lengths8.1 Overhead Electrical Conduct
22、ors may be constructed using steel core wire with any one of six types of the protective coatingsor aluminum clad and associated strength grades. The acceptable core wires are produced to ASTM Specifications shown inSection 5 of this standard.8.2 The number and diameters of the steel wires shall con
23、form to the requirements in respective ASTM Conductor Standards.8.3 Recommended standard unit-stranded-core multiple lengths are given in respective ASTM Conductor Standards.9. Length Tolerance9.1 All lengths of stranded core shall be furnished to a length tolerance of 62%.10. Tensile Properties10.1
24、 The rated ultimate strength or strength at 1 % extension of stranded core for overhead electrical conductors shall be takenas that percentage according to the number of wires, indicated below, of the sum of the strengths of the steel wires, calculated fromtheir specified nominal wire diameter and t
25、he appropriate specified minimum stress at 1 % extension or ultimate strength given inSpecifications B498/B498M, B606, B802/B802M, B803, B957, or , B958 or B502:72wire strand96 % of sum of componentsB0500_B0500M-12_1B0500_B0500M-12_2B0500_B0500M-12_3B0500_B0500M-12_410.2 Stranded steel core samples
26、shall sustain loads equal to or greater than the values computed by the method of 10.1.Compliance can be shown either by testing the completed strand or by calculation using the strands individual wire properties(e.g., ultimate strength or stress at 1% extension). When calculating the strand strengt
27、hs using the strands individual wireproperties, it shall be computed as the percentage of the sum of the actual wire strengths as indicated below:B0500_B0500M-12_5B500/B500M 122B0500_B0500M-12_6B0500_B0500M-12_7B0500_B0500M-12_810.3 For determining compliance with the rated strength at 1 % extension
28、, use a Class B-1, B-2, or C extensometer as describedin Practice E83. The gage length shall be not less than 20 in. (500 mm).10.4 When testing the completed stranded core strand, apply an initial load computed from the formula below and Table 1.Attach the extensometer and set to the appropriate Ini
29、tial Setting from Table 1. Then increase the load until the indicated totalextension is 1 % (0.0100 in./in. or 0.0100 mm/mm). Record the load as the strength at 1 % extension.B0500_B0500M-12_910.5 Stranded steel core shall meet the minimum requirements for tensile strength at 1 % extension except as
30、 set forth in 10.6.10.6 Purchasers of core intended for use in conductor constructions with annealed aluminum wires, such as ACSS, may requestthe stranded steel core be compliant only with ultimate tensile strength and may waive compliance with the 1 % extension tensilerequirement. This use of the u
31、ltimate tensile requirement as an alternate to the 1 % extension requirement shall be by agreementbetween the purchaser and producer and shall be noted on product compliance documentation B498/B498M, B606, B802/B802M,B803, B957, or , B958 or B502.11. Workmanship11.1 The finished stranded core shall
32、be uniform in diameter and shall be free from imperfections not consistent with goodcommercial stranding practice. The stranded core shall be free from waviness and kinks.12. Number of Tests12.1 Samples from each lot shall be taken in accordance with Table 2. A lot shall be defined as all the packag
33、es (reels or coils)of the same size, construction, length, and type of coating offered for shipment at one time.12.2 An alternative to 12.1 is to use the strand production lot. Testing would be completed on the individual wires, completedstrand, or both, sampled to be representative of all strand re
34、els produced from that strand production lot. If the producer makesthis election, the purchaser still reserves the right to test wires or strand from the offered lot as outlined in 12.1. With this option,the producer shall report the test results of all reels in the shipment in lieu of using Table 2
35、.12.3 Samples shall be tested for compliance with Sections 7 and 10 and as required in the applicable wire standard referencedin Section 2.13. Inspection13.1 All tests and inspection shall be made at the place of final manufacture unless otherwise agreed upon between the producerand the purchaser at
36、 the time of purchase.14. Rejection14.1 Failure of any of the test specimens to comply with the requirements of this specification shall constitute grounds forrejection of the lot represented by the specimen. The lot may be resubmitted for inspection by testing every package (reels or coils)for the
37、characteristic in which the specimen failed and sorting out the defective packages.15. Packaging and Package Marking15.1 Package sizes and kind of package shall be agreed upon between the manufacturer and the purchaser.15.2 When permitted by the purchaser two or more unit lengths of stranded core ma
38、y be shipped on one reel. If the multiplelength is continuous, with no welds or strand joints, a flag or marker shall be placed in the reel where the unit length ends. If themultiple length on the reel consists of two or more separate lengths, they must not be joined. The free ends must be secured t
39、othe reel head, and a flag or warning marker shall be inserted in the winding, warning of the approaching end.15.3 The net weight, length or lengths, construction (strands 3 wire diameter), direction of lay of outside layer, type of wirecoating, purchase order number, Specification B500/B500M, and m
40、anufacturers name shall be marked on a tag and attached onthe outside of the package. If multiple lengths are allowed, marking must show position and footage of each length and whether“continuous or “separated lengths.16. Keywords16.1 metallic coated steel wire strand; steel core wire strand; steel
41、wire strandTABLE 1 Initial Setting for Determining Stress at 1 % ExtensionNominal Wire Diameter Initial Stress Initial 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 3.0
42、484.823 42 000 29.5 290 0.0015 0.0015B500/B500M 123SUMMARY OF CHANGESCommittee B01 has identified the location of selected changes to this standard since the last issue(B500/B500M 10) that may impact the use of this standard. (Approved April 1, 2012.)(1) Changed title and references thoughout standa
43、rd to include aluminum clad steel core.Committee B01 has identified the location of selected changes to this standard since the last issue(B500/B500M 09) that may impact the use of this standard. (Approved Oct. 1, 2010.)(1) Add to Section 2 B957 and B958.(2) Add to Section 5: 5.1.5 Specification B95
44、7; 5.1.6 Specification B958.(3) Add to Section 10 the last sentence: B 498/B 498M, B 606, B 802/B 802M, B 803, B957, or B958.ASTM 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 ex
45、pressly advised that determination of the validity of 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 revi
46、sed, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you ma
47、y attend. If you feel that your comments have not received 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 Sta
48、tes. 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 2 Number of SamplesNo. of Packages in Lot No. of Samples1to3 all4to30 3Over 30 10 %B500/B500M 124
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