ASTM B711-2012 Standard Specification for Concentric-Lay-Stranded Aluminum-Alloy Conductors Steel Reinforced (AACSR) (6201).pdf

1、Designation: B711 12Standard Specification forConcentric-Lay-Stranded Aluminum-Alloy Conductors, SteelReinforced (AACSR) (6201)1This standard is issued under the fixed designation B711; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio

2、n, the 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 concentric-lay-stranded con-ductors made from round aluminum-alloy 6201-T81 h

3、ard:solution heat treated, cold worked, and then artificially agedwire and round zinc-coated, Zn-5Al-MM coated, aluminum-coated, or aluminum-clad steel core wire for use as overheadelectric conductors (Explanatory Note 1 and Note 2).NOTE 1The alloy and temper designations conform to ANSI H35.1.Alumi

4、num alloy 6201 corresponds to Unified Numbering System alloyA96201 in accordance with Practice E527.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if

5、any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on dateof materia

6、l purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB341/B341M Specification for Aluminum-Coated (Alumi-nized) Steel Core Wire for Aluminum Conductors, SteelReinforced (ACSR/AZ

7、) (Withdrawn 2007)3B354 Terminology Relating to Uninsulated Metallic Electri-cal ConductorsB398/B398M Specification for Aluminum-Alloy 6201-T81Wire for Electrical PurposesB498/B498M Specification for Zinc-Coated (Galvanized)Steel Core Wire for Use in Overhead Electrical Conduc-torsB500/B500M Specifi

8、cation for Metallic Coated or Alumi-num Clad Stranded Steel Core for Use in OverheadElectrical ConductorsB502 Specification for Aluminum-Clad Steel Core Wire forUse in Overhead Electrical Aluminum ConductorsB606 Specification for High-Strength Zinc-Coated (Galva-nized) Steel Core Wire for Aluminum a

9、nd Aluminum-Alloy Conductors, Steel ReinforcedB802/B802M Specification for Zinc5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for AluminumConductors, Steel Reinforced (ACSR)B803 Specification for High-Strength Zinc5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use inOverhead Electric

10、al ConductorsB957 Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core Wire forOverhead Electrical ConductorsB958 Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Over

11、head ElectricalConductorsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.3 American National Standards Institute Standard:H35.1M Alloy and Temper Designation Systems

12、for Alumi-num42.4 Other Standards:NBS Handbook 100Copper Wire Tables53. Terminology3.1 Definitions of Terms Specific to This Standard:1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Li

13、ght Metals.Current edition approved Oct. 15, 2012. Published January 2013. Originallyapproved in 1982. Last previous edition approved in 2005 as B711 05. DOI:10.1520/B0711-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For

14、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 1

15、0036.5Available from National Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 3460, Gaithersburg, MD 20899-3460.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.1 AACSRcovered by this specification has five typeso

16、f coated steel and one type of aluminum-clad steel core wirewhich are designated by abbreviations as follows (ExplanatoryNote 1):3.1.1.1 AACSR/GA2-AACSRusing Class A zinc-coatedsteel wire in accordance with Specification B498/B498M.3.1.1.2 AACSR/GC2-AACSRusing Class C zinc-coatedsteel wire in accord

17、ance with Specification B498/B498M.3.1.1.3 AACSR/GA3-AACSRusing high-strength steelwire in accordance with Specification B606.3.1.1.4 AACSR/GA4-AACSRusing extra-high-strengthsteel wire in accordance with Specification B957.3.1.1.5 AACSR/GA5-AACSRusing ultra-high-strengthsteel wire in accordance with

18、 Specification B957.3.1.1.6 AACSR/AW2-AACSRusing aluminum-clad steelwire, normal strength in accordance with Specification B502.3.1.1.7 AACSR/AW3-AACSRusing aluminum-clad steelwire, high strength in accordance with Specification B502.3.1.1.8 AACSR/MA2using Zn-5Al-MM coated steel corewire, coating Cl

19、ass A in accordance with Specification B802/B802M.3.1.1.9 AACSR/MC2using Zn-5Al-MM coated steel corewire, coating Class C in accordance with Specification B802/B802M.3.1.1.10 AACSR/MA3using high-strength Zn-5Al-MMcoated steel core wire, coating Class A in accordance withSpecification B803.3.1.1.11 A

20、ACSR/MA4using extra-high-strength Zn-5Al-MM coated steel core wire, coating Class A in accordancewith Specification B958).3.1.1.12 AACSR/AZ-MA5using ultra-high-strength Zn-5Al-MM coated steel core wire, coating Class A in accordancewith Specification B958.4. Ordering Information4.1 Orders for materi

21、al under this specification shall includethe following information:4.1.1 Quantity of each size and stranding,4.1.2 Conductor size, square millimetres (Section 8 andTable 1);4.1.3 Number of wires, aluminum and steel;4.1.4 Type of steel core wire and, if galvanized or Zn-5Al-MM coated, class (A, B, or

22、 C) of coating (see 5.2);4.1.5 Direction of lay of outer layer of aluminum wires ifother than right-hand (see 7.2);4.1.6 Special tension test, if required (see 9.2);4.1.7 Place of inspection (Section 15);4.1.8 Special package marking, if required (Section 16);4.1.9 Package size (see 17.1); and4.1.10

23、 Heavy wood lagging, if required (see 17.3).5. Requirement for Wires5.1 Before stranding, the aluminum-alloy wire shall meetthe requirements of Specification B398/B398M.5.2 Before stranding, the steel core wire shall meet therequirements of Specification B341/B341M, B498/B498M,B502, B606, B802/B802M

24、,orB803, whichever is applicable.5.3 Steel core supplied in a stranded construction shall meetthe requirements of Specification B500/B500M, if applicable.6. Joints6.1 Cold-pressure welds, electric-butt welds, and electric-butt, cold-upset welds in the finished individual aluminumalloy wires composin

25、g the conductor may be made during thestranding process. Following welding, electric-butt welds shallbe annealed for a distance of at least 150 mm on each side ofthe weld. No weld shall occur within 15 m of a weld in thesame wire or in any other wire of the completed conductor(Explanatory Note 3).6.

26、2 There shall be no joints made in the finished steel wires.7. Lay Factors7.1 The length of lay in the various layers of wire in aconductor shall conform to Table 2 (Explanatory Note 4).7.2 The direction of lay of the outside layer of aluminum-alloy wires shall be right-hand unless otherwise specifi

27、ed in thepurchase order. The direction of lay of the aluminum alloy andsteel wires shall be reversed in successive layers.8. Construction8.1 The number and diameter of aluminum alloy and steelwires and the areas of cross section of aluminum alloy wiresshall conform to the requirements prescribed in

28、Table 1.9. Rated Strength of Conductor9.1 The rated strength of a conductor shall be taken as thesum of the strengths of the aluminum alloy and steelcomponents, calculated as follows:9.1.1 The strength contribution of the aluminum-alloy wiresshall be the sum of the strengths of the 6201 wires, calcu

29、latedfrom their specified nominal wire diameter and the appropriatespecified minimum average tensile strength given in Specifi-cation B398/B398M, and multiplied by the aluminum-alloyRating Factor percentage for the conductor stranding as indi-cated in Table 3.9.1.2 The strength contribution of the s

30、teel core wires shallbe the sum of the strengths of the steel wires, calculated fromtheir specified nominal wire diameter and the appropriatespecified ultimate tensile strength given in SpecificationsB498/B498M, B341/B341M, B502, B606, B802/B802M,orB803, whichever is applicable, and multiplied by th

31、e steelRating Factor percentage for the conductor stranding as indi-cated in Table 3.9.1.3 The rated strengths of conductors calculated in accor-dance with 9.1 and 9.3 and using steel wires in accordance withSpecification B498/B498M or B802/B802M, Class A coatingare shown in Table 1.9.2 Tests for de

32、monstration of rated strength of a conductorare not required by this specification but may be made if agreedupon between the manufacturer and the purchaser at the time ofplacing an order. If tested, the breaking strength of theconductor shall be not less than the rated strength if failureoccurs in t

33、he free length at least 25 mm beyond the end ofeither gripping device, or shall be not less than 95 % of theB711 122rated strength if failure occurs inside, or within 25 mm of theend of, either gripping device (Explanatory Note 5).TABLE 1 Construction Requirements of Aluminum-Alloy Conductors, Steel

34、 Reinforced, Concentric-Lay-StrandedConductor Area, mm2StrandingAand Wire Diameter Diameter, mmRated StrengthBMassCAlloyNominalSteel TotalAlloy SteelConductor Steel CoreNumber mm Number mm kN kg/km12501120102911352121184844.354.1219192.612.4747.845.313.012.44904394255381610009008173108197384843.893.

35、6919192.332.2142.840.611.611.0391355340030608007101019090180054544.344.0919192.602.4539.036.813.012.236332230032664630560807171063154543.853.6319192.312.1834.632.711.610.928625723652104500450635956350954543.433.2619192.061.9830.929.510.39.9022921518781706400400916549146530264.124.431972.473.4528.828

36、.112.410.423720718181616355355815843641330263.884.171972.333.2427.226.411.69.7221118316141430315315725238736730263.663.931972.203.0625.624.911.09.1819016314381272280280654634532630263.453.70773.452.8824.223.410.48.6417114412861127250250584130829130263.263.50773.262.7222.822.29.788.161561291149100822

37、4224523627626030263.083.31773.082.5721.621.09.247.711391181025901200200473224723230262.913.13772.912.4320.419.88.737.29124106915805180180422922220930262.762.97772.762.3119.318.88.286.9311295.1823731160160382619818630262.612.80772.612.1818.317.77.836.5410685.6736646140140332317316330262.442.62772.442

38、.0417.116.67.326.1287.475.0643565AOnly those strandings with a relatively high steel content are listed. Other strandings are available by agreement between the purchaser and the producer.BRated strengths are for AACSR/GA and AACSR/MA conductors. Strengths were calculated in accordance with 9.1.CMas

39、s applies to AACSR/GA, AACSR/MA, and AACSR/AZ conductors.TABLE 2 Lay Factors of Aluminum-Alloy Conductors Steel ReinforcedStrandingRatio of Length of Lay of a Layer to Nominal Outside Diameter of That LayerAluminum-Alloy Wire Layers Steel Wire LayersFirst (Outside) Second Third Fourth 12-Wire 6-Wire

40、Min PrefAMax Min Pref Max Min Max Min Max Min Pref Max Min Pref Max84/19 10 11 13 10 13 16 10 17 10 17 16 20 24 18 25 3076/19 10 11 13 10 13 16 10 17 10 17 16 20 24 18 25 3054/19 10 11 13 10 13 16 10 17 . . 16 20 24 18 25 3054/7 10 11 13 10 13 16 10 17 . . . . . 18 25 3030/7 10 11 13 10 13 16 . . .

41、. . . . 18 25 3026/7 10 11 13 10 13 16 . . . . . . . 18 25 30APreferred (Pref).B711 1239.3 Rated strength and breaking strength values shall berounded to three significant figures, in the final value only, inaccordance with the rounding method of Practice E29.10. Density10.1 For the purpose of calcu

42、lating mass, cross sections,etc., the density of aluminum-alloy 6201 shall be taken as 2690kg/m3at 20C.10.2 For the purpose of calculating mass, cross sections,etc., the density of coated steel wire shall be taken as 7780kg/m3at 20C.10.3 For the purpose of calculating mass, cross sections,etc., the

43、density of aluminum-clad steel wire shall be taken as6590 kg/m3at 20C.11. Mass and Electrical Resistance11.1 The mass and electrical resistance of a unit length ofstranded conductor are a function of the length of lay. Theapproximate mass and electrical resistance may be determinedusing the standard

44、 increments shown in Table 4. When greateraccuracy is desired, the increment based on the specific lay ofthe conductor may be calculated (Explanatory Note 6).11.2 In the calculation of the electrical resistance of acompleted conductor, the resistivity of coated steel core wiresshall be taken as 0.19

45、157-mm2/m at 20C, and the resistivityof aluminum-clad steel core wires shall be taken as 0.0848-mm2/m at 20C.12. Variation in Area12.1 The area of cross section of the aluminum-alloy wiresof a conductor shall be not less than 98 % of the area specified.Unless otherwise specified by the purchaser, th

46、e manufacturermay have the option of determining the cross-sectional area byeither of the following methods, except that in case of questionregarding area compliance, the method of 12.1.2 shall be used:12.1.1 The area of cross section may be determined bycalculations from diameter measurements, expr

47、essed to threedecimal places, of the component aluminum wires at any pointwhen measured perpendicularly to their axes.12.1.2 The area of cross section of the aluminum-alloywires of a conductor may be determined by Test Method B263.In applying that method the increment in mass resulting fromstranding

48、 may be the applicable value specified in 11.1 or maybe calculated from the measured component dimensions of thesample under test. In case of question regarding areacompliance, the actual mass increment due to stranding shallbe calculated.13. Finish13.1 The conductor shall be free of imperfections n

49、otconsistent with good commercial practice.14. Mechanical and Electrical Tests14.1 Tests for mechanical and electrical properties ofaluminum-alloy wires shall be made before stranding (Ex-planatory Note 7).14.2 All aluminum-alloy wires composing the conductorsshall be capable of meeting the bending properties stated inSpecification B398/B398M after stranding. Routine productiontesting after stranding is not required.14.3 Routine production testing after stranding is not re-quired. However, when such tests are requested by the pur-chaser and agreed upon by