ASTM B803 B803M-2008(2016) Standard Specification for High-Strength Zinc&x2013 5&x2009 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors《.pdf

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1、Designation: B803/B803M 08 (Reapproved 2016)Standard Specification forHigh-Strength Zinc5 % Aluminum-Mischmetal Alloy-CoatedSteel Core Wire for Use in Overhead Electrical Conductors1This standard is issued under the fixed designation B803/B803M; the number immediately following the designation indic

2、ates the yearof 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. Scope1.1 This specification covers round, high stren

3、gth, zinc5 %aluminum-mischmetal (Zn5AlMM) alloy-coated, steel corewire with one class of Zn5AlMM coating (MA3) for use inoverhead electrical conductors.1.2 This specification covers wire of diameter from 0.0500to 0.1900 in. inclusive or 1.27 to 4.82 mm inclusive.1.3 The values stated in either SI un

4、its 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. Referenced Documents2

5、.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:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitio

6、ns for Mechanical Testingof Steel ProductsA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsB193 Test Method for Resistivity of Electrical ConductorMaterialsB750 Specification for GALFANE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys (Withdrawn 1

7、997)3E1277 Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission SpectrometryE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.3 Other Standard:GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in

8、GalfanAlloy (5 %Al-0.04 %La-0.04 % Ce-Bal SHG Zn)43. Terminology3.1 Abbreviations:3.1.1 MMmischmetal3.1.2 Zn5AlMMzinc5 % aluminum mischmetal alloy3.2 Definitions:3.2.1 lotunless otherwise specified in the contract ororder, a lot shall consist of all coils of wire of the samediameter and unit lengths

9、 submitted for inspection at the sametime.3.2.2 product codeDefines product coating type, coatingclass and strength grade. This specification covers only HighStrength ClassA Zn5AlMM coated products and identified asproduct code MA3.4. Ordering Information4.1 Orders for material under this specificat

10、ion shall includethe following information:4.1.1 Quantity of each size,4.1.2 Wire diameter in inches or millimeters (Section 13),4.1.3 Certification, if required (Section 18),4.1.4 Test report, if required (Section 18), and4.1.5 Package Size (Section 19).4.1.6 Product Code (Paragraph 3.2.2).4.1.7 Or

11、der Example: five multiple lengths of 12 000 ft.each, 0.1327 in. MA3 wire, packaged onto wooden non-returnable reels, with certified test report.5. Materials and Manufacture5.1 The base metal shall be steel produced by the open-hearth, electric furnace, or basic oxygen process.1This specification is

12、 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 Oct. 1, 2016. Published October 2016. Originallyapproved in 1989. Last previous edition approved in 2008 as B803/B803M

13、 081.DOI: 10.1520/B0803_B0803M-08R16.2For 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.3The last approved versi

14、on of this historical standard is referenced onwww.astm.org.4Available from International Lead Zinc Research Organization (ILZRO), 1822NC Highway 54 East, Suite 120, Durham, NC 27713, http:/www.ilzro.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29

15、59. United States15.2 The wire shall be cold drawn and coated withZn5AlMM alloy to produce the desired properties.6. Chemical Composition6.1 The steel shall conform to the requirements prescribedin Table 1.6.2 Chemical analysis of the steel shall be conducted inaccordance with Test Methods, Practice

16、s, and TerminologyA751.6.3 The ingot form of zinc-5 % aluminum-mischmetal alloyshall conform to Specification B750.6.3.1 For a two-step coating operation where the firstcoating is zinc (hot-dip galvanized or electrogalvanized), thefinal bath may have an aluminum content of up to 7.2 %, toprevent dep

17、letion of the aluminum content of the bath.6.3.2 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Methods E47 for Tin), ICP Argon Plasma Spectro-metric (Practice E1277), or other methods. In case of dispute,the results secured by Pr

18、actice E1277 shall be the basis ofacceptance.6.3.3 A Method of Coating Material AnalysisRefer toSpecification B750. In case of dispute, the results secured byPractice E1277 shall be the basis of acceptance.7. Tensile Test7.1 The Zn5AlMM-coated steel core wire shall conformto the tensile and elongati

19、on requirements prescribed in Table2 or Table 3.7.2 Tensile tests shall be conducted in accordance with TestMethods and Definitions A370, using the initial settings fordetermining stress at 1 % extension given in Table 4 or Table5 of this specification.7.3 Test SpecimensThe test specimens shall be f

20、ree 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 performed by drawing between wood blocks or bysome other equally satisfactory means.8. Wrap Test8.1

21、 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 cylindrical mandrel with adiameter equal to three times the specified diameter of the wireunder te

22、st, 65%.9. Coating Test9.1 The Zn5AlMM alloy-coated wire shall conform to thecoating requirements prescribed in Table 6 or Table 7.9.2 The coating test shall be conducted in accordance withTest Method A90/A90M.10. Adherence of Coating Test10.1 The Zn5AlMM alloy-coated wire shall be capable ofbeing w

23、rapped 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, without cracking or flaking thecoating to such an extent that any Zn5AlMM alloy can beremoved by rubbing with the bare fingers.TABLE 1 Chemical RequirementsE

24、lement Composition, %Carbon 0.50 to 0.88Manganese 0.50 to 1.30Phosphorus, max 0.035Sulfur, max 0.045Silicon 0.10 to 0.35TABLE 2 Tensile RequirementsSpecified DiameterStress at 1 %Extension, minUltimate TensileStrength, minElongation in 10in., min %in. ksi ksi0.0500 to 0.0899, incl 210 235 3.00.0900

25、to 0.1199, incl 205 230 3.00.1200 to 0.1399, incl 200 225 3.50.1400 to 0.1900, incl 195 220 3.5TABLE 3 Tensile Requirements MetricSpecified DiameterStress at 1 %Extension, minUltimate TensileStrength, minElongation in 250mm, min %mm MPa MPa1.27 to 2.28, incl 1450 1620 3.02.29 to 3.04, incl 1410 1590

26、 3.03.05 to 3.55, incl 1380 1550 3.53.56 to 4.82, incl 1340 1520 3.5TABLE 4 Initial Settings for Determining Stress at 1 % ExtensionSpecified Diameter Initial Stress Initial Setting of Extensometer,in./in.in. ksi0.0500 to 0.0899, incl 15 0.0005 (0.05 % Extension)0.0900 to 0.1199, incl 30 0.0010 (0.1

27、0 % Extension)0.1200 to 0.1900, incl 46 0.0015 (0.15 % Extension)TABLE 5 Initial Settings for Determining Stress at 1 % ExtensionMetricSpecified Diameter Initial Stress Initial Setting of Extensometer,mm/mmmm MPa1.27 to 2.28, incl 110 0.0005 (0.05 % Extension)2.29 to 3.04, incl 210 0.0010 (0.10 % Ex

28、tension)3.05 to 4.82, incl 320 0.0015 (0.15 % Extension)TABLE 6 Zn5AlMM Alloy CoatingSpecified Diameter ofCoated WireArea Density of Zn5AlMM Alloy Coating min ofUncoated Wire Surface, oz/ft2in. Class A0.0500 to 0.0599, incl 0.600.0600 to 0.0749, incl 0.650.0750 to 0.0899, incl 0.700.0900 to 0.1039,

29、incl 0.750.1040 to 0.1199, incl 0.800.1200 to 0.1399, incl 0.850.1400 to 0.1799, incl 0.900.1800 to 0.1900, incl 1.00B803/B803M 08 (2016)2NOTE 1Loosening or detachment during the adhesion test ofsuperficial, small particles of Zn5AlMM alloy formed by mechanicalpolishing of the surface of the coated

30、wire shall not be considered causefor rejection.11. Joints11.1 No joints shall be made in the finished wire.11.2 Joints may be made at any stage of processing prior tofinal cold drawing by the electric butt-weld or flash orflash-welding process.11.3 Welding equipment and procedure shall be such that

31、 itcan be 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.11.4 A welded section shall not be required to meet thestress at 1 % extension, elongation, and wrap tests.12.

32、 Density and Resistivity12.1 For the purpose of calculating mass per unit length,cross sections, and so forth, the density of Zn5AlMMalloy-coated steel wire at 20C shall be taken as 0.281 lb/in.37780 kg/m3.12.2 A maximum resistivity of Zn5AlMM alloy-coatedsteel wire is not guaranteed but a typical v

33、alue of 0.19157mm2/m may be used for purpose of calculation. For conver-sion to other units of conductivity or resistivity, refer to TestMethod B193.13. Dimensions and Permissible Variations13.1 The specified diameter of the Zn5AlMM alloy-coated wire shall be expressed in decimal fractions of an inc

34、hto four decimal places, or in millimeters to two decimal places.13.2 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 E29.13.3 Measure the largest and smallest diame

35、ter taken at thesame cross section rounded to the nearest 0.001 in. 0.01 mmin 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 Table

36、10 or Table 11.14. Workmanship, Finish, and Appearance14.1 The Zn5AlMM alloy coating shall be reasonablysmooth, continuous, of reasonably uniform thickness and freeof imperfections not consistent with good commercial practice.15. Number of Tests and Retests15.1 One test specimen shall be taken from

37、each 5000 lb2500 kg or fraction thereof in the inspection lot.15.2 Each specimen shall be tested for compliance withSections 7, 8, 10, and 13. At least half of the specimens shallbe tested for compliance with Section 9.15.3 Should one or more of the test specimens fail any ofthe tests specified, the

38、 nonconforming coil or coils may beremoved and the balance of the lot subjected to retests. Forretest purposes, two additional coils for each 5000 lb 2500 kgin the lot shall be sampled and tested for the property in whichthe original sample failed to comply.15.4 Should any of the retest specimens fa

39、il to meet theproperties specified, the lot represented by the test specimensshall be rejected.15.5 Instead of rejecting the entire lot as provided in 15.4,the producer may test specimens from every coil in the lot forthe property in which failure occurred, and reject only thenonconforming coils.TAB

40、LE 7 Zn5AlMM Alloy Coating MetricSpecified Diameter ofCoated WireArea Density of Zn5AlMM Coating, min, ofUncoated Wire Surface, g/m2mm Class A1.27 to 1.52, incl 1831.53 to 1.90, incl 1981.91 to 2.28, incl 2142.29 to 2.64, incl 2292.65 to 3.04, incl 2443.05 to 3.55, incl 2593.56 to 4.57, incl 2744.58

41、 to 4.82, incl 305TABLE 8 Mandrel Size for Adherence TestSpecified Wire DiameterRatio of MandrelDiameter toWire Diameterin.0.0500 to 0.0899, incl 30.0900 to 0.1399, incl 40.1400 to 0.1900, incl 5TABLE 9 Mandrel Size for Adherence Test MetricSpecified Wire DiameterRatio of MandrelDiameter toWire Diam

42、etermm1.27 to 2.28, incl 32.29 to 3.04, incl 43.05 to 4.82, incl 5TABLE 10 Permissible Variations in Diameter of Zn5AlMMAlloy-Coated Steel WireNOTE 1It is recognized that the surface of coatings, particularly thoseproduced by the hot-dip method of coating, are not perfectly smooth anddevoid of irreg

43、ularities. If the tolerances shown in the table are rigidlyapplied to such irregularities that are inherent to the product, unjustifiedrejections of wire that would actually be satisfactory for use could occur.It is intended that these tolerances be used in gaging the wires where thereis a minimum o

44、f such diameter irregularities due to hot dip coating.Specified Diameter Permissible Variationin.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 0.003B803/B803M 08 (2016)316. Inspection16.1 Unless otherw

45、ise specified in the contract or purchaseorder, the manufacturer shall be responsible for the perfor-mance of all inspection and test requirement specified.16.2 All inspections and tests shall be made at the place ofmanufacture unless otherwise especially agreed to by themanufacturer and the purchas

46、er at the time of the purchase.16.3 The manufacturer shall afford the inspector represent-ing the purchaser all reasonable manufacturers facilities tosatisfy him that the material is being furnished in accordancewith this specification.17. Rejection and Rehearing17.1 Material that fails to conform t

47、o the requirements ofthis specification shall be rejected. Rejection should be re-ported to the producer or supplier promptly and in writing. Incase of dissatisfaction with the results of the test, the produceror supplier may make claim for a rehearing.18. Certification18.1 When specified in the pur

48、chase 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 contr

49、act, a report of the testresults shall be furnished.19. Packaging and Package Marking19.1 The unit lengths shall be as specified in the contract ororder. Length tolerances shall be 62 % unless otherwisespecified by the purchaser (See Explanatory Note 1).19.2 Package dimensions, kind of package (coils, reels, orreelless coils), and quantity of wire in each package shall beagreed upon by the manufacturer and the purchaser.19.3 A durable tag shall be securely attached to eachpackage showing the nominal diame