1、Designation: B 498/B 498M 98 (Reapproved 2002)Standard Specification forZinc-Coated (Galvanized) Steel Core Wire for AluminumConductors, Steel Reinforced (ACSR)1This standard is issued under the fixed designation B 498/B 498M; the number immediately following the designation indicates the yearof ori
2、ginal 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 round, zinc-coated, steel corewire
3、with three classes of zinc 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 1.60 to 4.80 mm, inclusive.1.3 The values stated in inch-pound units or SI units are tobe r
4、egarded separately as standard. The values in each systemare not exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the twosystems may result in nonconformance with this specification.2. Referenced Documents2.1 The following documents of the issu
5、e in effect on dateof material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:A 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy Coatings2A 370 Test Methods and Definitions for Mechanical Testingof Steel P
6、roducts3A 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel Products3B 6 Specification for Zinc4B 193 Test Method for Resistivity of Electrical ConductorMaterials53. Terminology3.1 Definition:3.1.1 lotunless otherwise specified in the contract ororder, a lot shall consist of
7、 all coils of wire of the samediameter and unit lengths submitted for inspection at the sametime.4. Classification4.1 The wire is furnished in three classes of coating, ClassA, Class B, or Class C, as specified, in conformance with therequirements of Section 10 and Table 1 or Table 2.5. Ordering Inf
8、ormation5.1 Orders for material under this specification shall includethe following information:5.1.1 Quantity of each size,5.1.2 Wire diameter in inches or millimetres (Section 14),5.1.3 Class of coating (see 4.1),5.1.4 Certification, if required (Section 19),5.1.5 Test report, if required (Section
9、 19), and5.1.6 Package size (Section 20).6. Materials and Manufacture6.1 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 with zinc toproduce the desired properties.6.3 The slab zinc used for coating shal
10、l be high-grade orbetter, conforming to Specification B 6.7. Chemical Composition7.1 The steel shall conform to the requirements prescribedin Table 3.7.2 Chemical analysis shall be conducted in accordancewith Test Methods, Practices, and Terminology A 751.8. Tensile Test8.1 The zinc-coated steel cor
11、e wire shall conform to thetensile and elongation requirements prescribed in Table 4 andTable 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 given in Table 6 or Table7 of this specificatio
12、n.8.3 Test SpecimensThe test specimens shall be free ofbends or kinks other than the curvature resulting from the usual1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.05 onConductors of Ferrous Metals.Cu
13、rrent edition approved Sept. 10, 1998. Published November 1998. Originallypublished as B 498 69 to replace B 245 and B 261. Last previous editionB 498 93.2Annual Book of ASTM Standards, Vol 01.06.3Annual Book of ASTM Standards, Vol 01.03.4Annual Book of ASTM Standards, Vol 02.04.5Annual Book of ASTM
14、 Standards, Vol 02.03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.coiling operations. Any hand straightening necessary to permitinsertion of the specimen in the jaws of the testing machineshall be performed by drawing between woo
15、d blocks or bysome other equally satisfactory means.9. Wrap Test9.1 The material, as represented by the test specimens, shallnot fracture when the galvanized wire is wrapped at a rate notexceeding 15 turns/min in a close helix of at least eight turnsaround a cylindrical mandrel with a diameter equal
16、 to twotimes the specified diameter of the wire under 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 coating test shall be conducted in accordan
17、ce withTest Method A 90/A 90M.11. Adherence of Coating Test11.1 The zinc-coated wire shall be capable of beingwrapped in a close helix at a rate not exceeding 15 turns/minaround a cylindrical mandrel having a diameter as prescribed inTable 8 and Table 9, without cracking or flaking the zinccoating t
18、o such an extent that any zinc can be removed byrubbing with the bare fingers.NOTE 1During the adhesion test the loosening or detachment ofsuperficial, small particles of zinc formed by mechanical polishing of thesurface of the zinc-coated wire shall not be considered cause for rejection.12. Joints1
19、2.1 No joints shall be made in the finished wire.12.2 Joints may be made at any stage of processing beforefinal cold drawing by the electric butt-weld or flash-weldingprocess.12.3 Welding equipment and procedure shall be such that itcan be demonstrated that the tensile strength of a finished wirespe
20、cimen containing the welded section shall not be less than96 % 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.13. Density and Resistivity13.1 For the purposes of calculating mass per unit len
21、gth,cross-sections, and so forth, the density of galvanized steelwire at 20C shall be taken as 0.281 lb/in.3(7780 kg/m3).13.2 A maximum resistivity of galvanized steel wire is notguaranteed, but a typical value of 0.191 57 Vmm2/m may beused for purposes of calculation. For conversion to other unitso
22、f conductivity or resistivity, refer to Test Method B 193.14. Dimensions and Permissible Variations14.1 The specified diameter shall be expressed in decimalfractions of an inch to four decimal places or in millimetres anddecimal fractions of a millimetre to two decimal places.14.2 For diameter measu
23、rements and diameter tolerances,specified diameters shall be rounded to the closest 0.0005 in. or0.01 mm.14.3 Determine the greatest and least diameters each to theneareast 0.001 in. or 0.01 mm, at the same cross-section. Theaverage of these two diameters shall not differ from thespecified diameter
24、by more than the tolerances shown in Table10 and Table 11.15. Workmanship, Finish, and Appearance15.1 The zinc coating shall be reasonably smooth, continu-ous, of reasonably uniform thickness, and free from imperfec-tions not consistent with good commercial practice.16. Number of Tests and Retests16
25、.1 One test specimen shall be taken from each 5000 lbs or2500 kg. or fraction, thereof, in the inspection lot.16.2 Each specimen shall be tested for compliance withSections 8, 9, 11, and 14. At least half of the specimens shallbe tested for compliance with Section 10.16.3 Should one or more of the t
26、est 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 lbs or 2500kg. in the lot shall be sampled and tested for the property inwhich the original sample faile
27、d 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 test specimens from every coil in the lot forTABLE 1 Zinc CoatingSpecifie
28、d Diameter of CoatedWire, in.Area Density of Coating, min, oz/ft2ofUncoated Wire SurfaceClass A Class B Class C0.0500 to 0.599, incl 0.60 1.20 1.800.0600 to 0.0749, incl 0.65 1.30 1.950.0750 to 0.0899, incl 0.70 1.40 2.100.0900 to 0.1039, incl 0.75 1.50 2.250.1040 to 0.1199, incl 0.80 1.60 2.400.120
29、0 to 0.1399, incl 0.85 1.70 2.550.1400 to 0.1799, incl 0.90 1.80 2.700.1800 to 0.1900, incl 1.00 2.00 3.00TABLE 2 Zinc CoatingSpecified Diameter of CoatedWire, mmArea Density of Coating, min, g/m2ofUncoated Wire SurfaceClass A Class B Class C1.60 to 1.90, incl 210 420 630Over 1.90 to 2.30, incl 220
30、440 660Over 2.30 to 2.70, incl 230 460 690Over 2.70 to 3.10, incl 240 480 720Over 3.10 to 3.50, incl 260 520 780Over 3.50 to 3.90, incl 270 540 810Over 3.90 to 4.50, incl 275 550 825Over 4.50 to 4.80, incl 300 600 900TABLE 3 Chemical RequirementsElement Composition, %Carbon 0.50 to 0.85Manganese 0.5
31、0 to 1.10Phosphorus, max 0.035Sulfur, max 0.045Silicon 0.10 to 0.35B 498/B 498M 98 (2002)2the 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 perfo
32、r-mance of all inspection and test requirements specified.17.2 All inspections and tests shall be made at the place ofmanufacture, unless otherwise especially agreed upon betweenthe manufacturer and the purchaser at the time of the purchase.17.3 The manufacturer shall afford the inspector represent-
33、ing the purchaser all reasonable manufacturers facilities 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 t
34、o 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.TABLE 4 Tensile RequirementsSpecified Diameter, in.Stress at 1 % Extension, min, Ksi Ultimate Tensile Strength, min, Ksi Elongation in 10
35、 in., min, %ClassAClassBClassCClassAClassBClassCClassAClassBClassC0.0500 to 0.0899, incl 190 180 170 210 200 190 3.0 3.0 3.00.0900 to 0.1199, incl 185 175 165 205 195 185 3.5 3.0 3.00.1200 to 0.1399, incl 180 170 160 205 195 185 4.0 3.0 3.00.1400 to 0.1900, incl 170 160 155 200 185 180 4.0 4.0 4.0TA
36、BLE 5 Tensile RequirementsSpecified Diameter, mmStress at 1 % Extension, min, MPa Ultimate Tensile Strength, min, MPa Elongation in 250 mm, min, %ClassAClassBClassCClassAClassBClassCClassAClassBClassC1.60 to 2.30, incl 1310 1240 1170 1450 1380 1310 3.0 3.0 3.0Over 2.30 to 3.05, incl 1280 1210 1140 1
37、410 1340 1280 3.5 3.0 3.0Over 3.05 to 3.60, incl 1240 1170 1100 1410 1340 1280 4.0 3.0 3.0Over 3.60 to 4.80, incl 1170 1100 1070 1380 1280 1240 4.0 4.0 4.0TABLE 6 Initial Settings for Determining Stress at 1 % ExtensionSpecified Diameter,in.Initial Stress,KsiInitial Setting of Extensometer,in./ in.0
38、.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 % ExtensionSpecified Diameter,mmInitial Stress,MPaInitial Setting of Extensometer,mm/mm1.60 to
39、2.30, incl 100 0.0005 (0.05 % extension)Over 2.30 to 3.05, incl 190 0.0010 (0.10 % extension)Over 3.05 to 4.80, incl 290 0.0015 (0.15 % extension)TABLE 8 Mandrel Size for Adherence TestSpecified Wire Diameter, in.Ratio of Mandrel Diameter to WireDiameter0.0500 to 0.0899, incl 30.0900 to 0.1399, incl
40、 40.1400 to 0.1900, incl 5TABLE 9 Mandrel Size for Adherence TestSpecified Wire Diameter, mmRatio of Mandrel Diameter to WireDiameter1.60 to 2.30, incl 3Over 2.30 to 3.05, incl 4Over 3.05 to 4.80, incl 5TABLE 10 Permissible Variations in Diameter of Zinc-CoatedSteel WireNOTE 1It is recognized that t
41、he surface of zinc coatings, particularlythose produced by hot-dip galvanizing, are not perfectly smooth anddevoid of irregularities. 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
42、satisfactory for use could occur.Therefore, it is intended that these tolerances be used in gaging theuniform areas of the galvanized wire.Specified Diameter, inPermissible 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 0.002
43、0.1400 to 0.1900, incl 0.004 0.003TABLE 11 Permissible Variations in Diameter of Zinc-CoatedSteel WireNOTE 1It is recognized that the surface of zinc coatings, particularlythose produced by hot-dip galvanizing, are not perfectly smooth anddevoid of irregularities. If the tolerances shown in the tabl
44、e are rigidlyapplied to such irregularities that are inherent to the product, unjustifiedrejections of wire that would actually be satisfactory for use could occur.Therefore, it is intended that these tolerances be used in gaging theuniform areas of the galvanized wire.Specified Diameter, mmPermissi
45、ble Variation, mmPlus Minus1.60 to 2.30, incl 0.04 0.03Over 2.30 to 3.05, incl 0.05 0.05Over 3.05 to 3.60, incl 0.08 0.05Over 3.60 to 4.80, incl 0.10 0.08B 498/B 498M 98 (2002)319. Certification19.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furn
46、ished 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 Packag
47、e Marking20.1 The unit lengths shall be as specified in the contract ororder. Length tolerances shall be plus or minus 2 %, unlessotherwise specified by the purchaser.20.2 Package dimensions, kind of package (coils, reels orreelless coils), and quantity of wire in each package shall beagreed upon be
48、tween the manufacturer and purchaser.20.3 A durable tag shall be securely attached to eachpackage showing the nominal diameter of wire, class ofcoating, length, approximate weight, purchasers order num-ber, and manufacturers name.20.4 The starting end shall be identified.20.5 In case there is more t
49、han one piece in a package, thelength and position of each piece shall be shown on the tag.21. Keywords21.1 coated steel wire; steel core wire; steel wire; zinc-coated steel wireASTM 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 expressly 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 respo
