ASTM B802 B802M-2008 Standard Specification for Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors Steel Reinforced (ACSR).pdf

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1、Designation: B 802/B 802M 08Standard Specification forZinc5 % Aluminum-Mischmetal Alloy-Coated Steel CoreWire for Aluminum Conductors, Steel Reinforced (ACSR)1This standard is issued under the fixed designation B 802/B 802M; the number immediately following the designation indicates the yearof origi

2、nal 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 round, zinc5 % aluminum-mischmetal (Z

3、n5AlMM) alloy-coated, steel core wire withthree classes of Zn5AlMM coating used for mechanicalreinforcement in the manufacture of aluminum conductors,steel reinforced (ACSR).1.2 This specification covers wire of diameter from 0.0500to 0.1900 in. or 1.27 to 4.82 mm, inclusive.1.3 The values stated in

4、 either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenc

5、ed 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 Standards:2A 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA 370 Test Metho

6、ds and Definitions for Mechanical Testingof Steel ProductsA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsB 193 Test Method for Resistivity of Electrical ConductorMaterialsB 750 Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-D

7、ip CoatingsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys.E 1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-MischmetalAlloys by ICP Emission Spectrom-etryE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.3 Other Standard

8、:GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in GalfanAlloy (5 %Al-0.04 %La-0.04 % Ce-Bal SHG Zn)33. Terminology3.1 Abbreviations: Abbreviations:3.1.1 MMmischmetal.3.1.2 Zn5AlMMzinc5 % aluminum mischmetal.3.2 Definition:3.2.1 lotunless otherwise specified in the cont

9、ract ororder, a lot shall consist of all coils of wire of the samediameter and unit lengths submitted for inspection at the sametime.3.2.2 Product CodeDefines product coating type, coatingclass and strength grade. Two product codes for productproduced to this specification: Class A Zn5AlMM Coated =M

10、A1; and Class C Zn5AlMM Coated = MC1.4. Classification4.1 The wire is furnished in two classes of coating, Class Aor Class C, as specified, in conformance with the requirementsof Section 10 and Table 1 or Table 2.5. Ordering Information5.1 Orders for material under this specification shall includeth

11、e following information:5.1.1 Quantity of each size,5.1.2 Wire diameter in inches or millimeters (Section 14),5.1.3 Product Code (see paragraphs 3.2.2 and 4.1),5.1.4 Certification, if required (Section 19),5.1.5 Test report, if required (Section 19), and5.1.6 Package Size (Section 20).1This specific

12、ation is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.05 onConductors of Ferrous Metals.Current edition approved Nov. 1, 2008. Published December 2008. Originallyapproved in 1989. Last previous edition approved in 2002 as B

13、 802/B 802M 02.2For referenced ASTM standards, visit the ASTM website, www.astm.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 International Lead Zinc Resear

14、ch Organization (ILZRO), 1822NC Highway 54 East, Suite 120, Durham NC 27713, http:/www.ilzro.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Materials and Manuf

15、acture6.1 The base metal shall be steel produced by the open-hearth, electric furnace, or basic oxygen process.6.2 The wire shall be cold drawn and coated withZn5AlMM alloy to produce the desired properties.7. Chemical Composition7.1 The steel shall conform to the requirements prescribedin Table 3.7

16、.2 Chemical analysis of the steel shall be conducted inaccordance with Test Methods, Practices and TerminologyA 751.7.3 The ingot form of zinc-5% aluminum-mischmetal alloyshall conform to Specification B 750.7.3.1 For a two-step coating operation where the firstcoating is zinc (hot-dip galvanized or

17、 electrogalvanized), thefinal bath may have an aluminum content of up to 7.2 %, toprevent depletion of the aluminum content of the bath.7.3.2 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Methods E47for Tin), ICP argon plasma spe

18、ctromet-ric (Practice E 1277), or other methods. In case of dispute, theresults secured by Practice E 1277 shall be the basis ofacceptance.7.3.3 Method of Coating Material AnalysisRefer toSpecification B 750. In case of dispute, the results secured byPractice E 1277 shall be the basis of acceptance.

19、8. Tensile Test8.1 The Zn5AlMM-coated steel core wire shall conformto the tensile and elongation requirements prescribed in Table4 or Table 5.8.2 Tensile tests shall be conducted in accordance with TestMethods and Definitions A 370, using the initial settings fordetermining stress at 1 % extension g

20、iven in Table 6 or Table7 of this specification.8.3 Test SpecimensThe test specimens shall be free ofbends or kinks other than the curvature resulting from the usualcoiling operations. Any hand straightening necessary to permitinsertion of the specimen in the jaws of the testing machineshall be perf

21、ormed by drawing between wood blocks or bysome other equally satisfactory means.9. Wrap Test9.1 The material, as represented by the test specimens, shallnot fracture when the Zn5AlMM alloy-coated wire iswrapped at a rate not exceeding 15 turns/min in a close helixof at least eight turns around a cyl

22、indrical mandrel with adiameter equal to two times the specified diameter of the wireunder test, 65%.10. Coating Test10.1 The material, as represented by the test specimens,shall conform to the coating requirements of Table 1 or Table2, for the diameter and class of coating specified.10.2 The coatin

23、g test shall be conducted in accordance withTest Method A 90/A 90M.11. Adherence of Coating Test11.1 The Zn5AlMM alloy-coated wire shall be capable ofbeing wrapped in a close helix at a rate not exceeding 15turns/min around a cylindrical mandrel having a diameter asprescribed in Table 8 or Table 9,

24、without cracking or flaking thecoating to such an extent that any Zn5AlMM alloy can beremoved by rubbing with the bare fingers.NOTE 1Loosening or detachment during the adhesion test of super-ficial, small particles of Zn5AlMM alloy formed by mechanicalpolishing of the surface of the coated wire shal

25、l not be considered causefor rejection.12. Joints12.1 No joints shall be made in the finished wire.12.2 Joints may be made at any stage of processing prior tofinal cold drawing by the electric butt-weld or flash orflash-welding process.12.3 Welding equipment and procedure shall be such that itcan be

26、 demonstrated that the ultimate tensile strength of afinished wire specimen containing the welded section shall benot less than 96 % of the specified minimum stress at 1 %extension.12.4 A welded section shall not be required to meet thestress at 1 % extension, elongation, and wrap tests.TABLE 1 Zn-5

27、Al-MM Alloy CoatingSpecified Diameter of Coated Wire,in.Area Density of Coating, min,oz/ft2of Uncoated Wire SurfaceClass A Class C0.0500 to 0.0599, incl 0.60 1.800.0600 to 0.0749, incl 0.65 1.950.0750 to 0.0899, incl 0.70 2.100.0900 to 0.1039, incl 0.75 2.250.1040 to 0.1199, incl 0.80 2.400.1200 to

28、0.1399, incl 0.85 2.550.1400 to 0.1799, incl 0.90 2.700.1800 to 0.1900, incl 1.00 3.00TABLE 2 Zn-5Al-MM Alloy Coating (Metric)Specified Diameter of Coated Wire,mmArea Density of Coating, min,g/m2of Uncoated Wire SurfaceClass A Class C1.27 to 1.52, incl 183 5491.53 to 1.90, incl 198 5941.91 to 2.28,

29、incl 214 6422.29 to 2.64, incl 229 6872.65 to 3.04, incl 244 7323.05 to 3.55, incl 259 7773.56 to 4.57, incl 274 8224.58 to 4.82, incl 305 915TABLE 3 Chemical RequirementsElement Composition, %Carbon 0.50 to 0.88Manganese 0.50 to 1.10Phosphorus, max 0.035Sulfur, max 0.045Silicon 0.10 to 0.35B 802/B

30、802M 08213. Density and Resistivity13.1 For the purpose of calculating mass per unit length,cross sections, etc, the density of Zn5AlMM alloy-coatedsteel wire at 20C shall be taken as 0.281 lb/in.3(7780 kg/m3).13.2 A maximum resistivity of Zn5AlMM alloy-coatedsteel wire is not guaranteed but a typic

31、al value of 0.19157Vmm2/m may be used for purpose of calculation. For conver-sion to other units of conductivity or resistivity, refer to TestMethod B 193.14. Dimensions, Mass, and Permissible Variations14.1 The specified diameter of the zinc-coated wire shall beexpressed in decimal fractions of an

32、inch to four decimalplaces, or in millimeters to two decimal places.14.2 To determine the applicable tolerance range from Table10 or Table 11, round the specified diameter to the nearest0.001 in. (0.01 mm) in accordance with the rounding method ofPractice E29.14.3 Measure the largest and smallest di

33、ameter taken at thesame cross section rounded to the nearest 0.001 in. (0.01 mm)in accordance with the rounding method of Practice E29.Calculate the average of the two measurements. The calculatedvalue shall not differ from the specified diameter by more thanthe applicable tolerance range shown in T

34、able 10 or Table 11.15. Workmanship, Finish, and Appearance15.1 The Zn5AlMM alloy coating shall be reasonablysmooth, continuous, of reasonably uniform thickness, and freeof imperfections not consistent with good commercial practice.16. Number of Tests and Retests16.1 One test specimen shall be taken

35、 from each 5000 lb or2500 kg or fraction thereof in the inspection lot.TABLE 4 Tensile RequirementsSpecified Diameter, in.Stress at 1 % Extension, min, Ksi Ultimate Tensile Strength, min, Ksi Elongation in 10 in., min, %Class A Class C Class A Class C Class A Class C0.0500 to 0.0899, incl 190 170 21

36、0 190 3.0 3.00.0900 to 0.1199, incl 185 165 205 185 3.5 3.00.1200 to 0.1399, incl 180 160 205 185 4.0 3.00.1400 to 0.1900, incl 170 155 200 180 4.0 4.0TABLE 5 Tensile Requirements (Metric)Specified Diameter, mmStress at 1 % Extension, min, MPaUltimate Tensile Strength, min,MPaElongation in 250 mm, m

37、in, %Class A Class C Class A Class C Class A Class C1.27 to 2.28, incl 1310 1170 1450 1310 3.0 3.02.29 to 3.04, incl 1280 1140 1410 1280 3.5 3.03.05 to 3.55, incl 1240 1100 1410 1280 4.0 3.03.56 to 4.82, incl 1170 1070 1380 1240 4.0 4.0TABLE 6 Initial Settings for Determining Stress at 1 % Extension

38、Specified Diameter, in.Initial Stress,KsiInitial Setting of Extensometer,in./in.0.0500 to 0.0899,incl 14 0.0005 (0.05 % extension)0.0900 to 0.1199, incl 28 0.0010 (0.10 % extension)0.1200 to 0.1900, incl 42 0.0015 (0.15 % extension)TABLE 7 Initial Settings for Determining Stress at 1 % Extension(Met

39、ric)Specified Diameter, mmInitial Stress,MPaInitial Setting of Extensometer,mm/mm1.27 to 2.28, incl 100 0.0005 (0.05 % extension)2.29 to 3.04, incl 190 0.0010 (0.10 % extension)3.05 to 4.82, incl 290 0.0015 (0.15 % extension)TABLE 8 Mandrel Size for Adherence TestSpecified Wire Diameter, in.Ratio of

40、 Mandrel Diameterto Wire Diameter0.0500 to 0.0899, incl 30.0900 to 0.1399, incl 40.1400 to 0.1900, incl 5TABLE 9 Mandrel Size for Adherence Test (Metric)Specified Wire Diameter, mmRatio of Mandrel Diameterto Wire Diameter1.27 to 2.28, incl 32.29 to 3.04, incl 43.05 to 4.82, incl 5TABLE 10 Permissibl

41、e Variations in Diameter of Zn-5Al-MMAlloy-Coated Steel WireNOTE 1It is recognized that the surface of Zn-5Al-MM alloy coat-ings, particularly those produced by hot-dip coating, are not perfectlysmooth and devoid of irregularities. If the tolerances shown in the tableare rigidly applied to such irre

42、gularities that are inherent to the product,unjustified rejections of wire that would actually be satisfactory for usecould occur. It is intended that these tolerances be used in gaging the wireswhere there is a minimum of such diameter irregularities due to galva-nizing.Specified Diameter, in.Permi

43、ssible Variation, in.Plus Minus0.0500 to 0.0749, incl 0.0015 0.0010.0750 to 0.1199, incl 0.002 0.0020.1200 to 0.1399, incl 0.003 0.0020.1400 to 0.1900, incl 0.004 0.003B 802/B 802M 08316.2 Each specimen shall be tested for compliance withSections 8, 9, 11, and 14. At least half of the specimens shal

44、lbe tested for compliance with Section 10.16.3 Should one or more of the test specimens fail any ofthe tests specified, the nonconforming coil or coils may beremoved and the balance of the lot subjected to retests. Forretest purposes, two additional coils for each 5000 lb or 2500kg in the lot shall

45、be sampled and tested for the property inwhich the original sample failed to comply.16.4 Should any of the retest specimens fail to meet theproperties specified, the lot represented by the test specimensshall be rejected.16.5 Instead of rejecting the entire lot as provided in 16.4,the producer may t

46、est specimens from every coil in the lot forthe property in which failure occurred and reject only thenonconforming coils.17. Inspection17.1 Unless otherwise specified in the contract or purchaseorder, the manufacturer shall be responsible for the perfor-mance of all inspection and test requirement

47、specified.17.2 All inspections and tests shall be made at the place ofmanufacture unless otherwise especially agreed upon by themanufacturer and the purchaser at the time of the purchase.17.3 The manufacturer shall afford the inspector represent-ing the purchaser all reasonable manufacturers facilit

48、ies tosatisfy him that the material is being furnished in accordancewith this specification.18. Rejection and Rehearing18.1 Material that fails to conform to the requirements ofthis specification shall be rejected. Rejection should be re-ported to the producer or the supplier promptly and in writing

49、.In case of dissatisfaction with the results of the test, theproducer or the supplier may make claim for a rehearing.19. Certification19.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished 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.20. Packaging and Packa