1、Designation: A 586 04aStandard Specification forZinc-Coated Parallel and Helical Steel Wire StructuralStrand1This standard is issued under the fixed designation A 586; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers zinc-coated steel wire struc-tural strand, for use where a high-strength, high-modulus,multip
3、le-wire tension member is desired as a component partof a structure. The strand is available with parallel or helicalwire construction.1.1.1 The strand is available with several zinc coatingclasses and with two strength grades, as described in Section 4.1.2 The strand is furnished with Class A weigh
4、t zinc-coatedwires throughout. It can be furnished with Class B weight orClass C weight zinc-coated outer wires where additionalcorrosion protection is required.1.3 The values stated in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 90/A 90M Test Meth
5、od for Weight Mass of Coating onIron or Steel Articles with Zinc or Zinc-Alloy CoatingsA 902 Terminology Relating to Metallic Coated Steel Prod-uctsB6 Specification for Zinc3. Terminology3.1 See Terminology A 902 for definition of terms related tometallic-coated steel wire and strand.3.23.2.1 outer
6、wires (of strand), nthose wires in the oneouter-most layer of the wires composing the strand.4. Classification4.1 The wire strand is classified as follows.4.1.1 Breaking Strength is expressed as Grade 1 or Grade 2for strand having a Class A zinc coating on the outer wires ofthe strand. Strand with h
7、eavier coating on the outer wires isavailable in only one grade.4.1.2 Coating Weight is expressed as Class A, Class B, orClass C, based on the weight of coating on the outer wires inthe strand. All inner wires have a Class A coating.5. Ordering Information5.1 Orders for material under this specifica
8、tion shall includethe following information:5.1.1 Description of the product, as helical steel wire strandor parallel steel wire strand,5.1.2 Length of strand,5.1.3 Nominal diameter of strand (Table 1 and Table 2),5.1.4 Coating class for outer wires (Table 3),5.1.5 Grade, for strand with Class A coa
9、ting on outer wires,5.1.6 For helical strand, whether prestretched or nonpre-stretched,5.1.7 Mechanical tests if required (see 9.5 and 11.1),5.1.8 Special packaging requirements (14.1),5.1.9 Inspection (12.1 and 13.1), and5.1.10 ASTM Designation and year of issue, as ASTMA 586 .NOTE 1A typical order
10、ing description is as follows: 2500 ft, 1 in.,galvanized helical strand, Class A coating, Grade 1, on wooden reels, toASTM Specification A 586 .6. Material6.1 Base MetalThe base metal shall be carbon steel madeby the open-hearth, basic-oxygen, or electric-furnace processand of such quality that the
11、finished strand and the hard-drawnindividual zinc-coated wires coated by the hot-dip or electro-lytic process shall have the properties and characteristics asprescribed in this specification.6.2 ZincThe slab zinc when used shall conform to Speci-fication B6.7. Physical Requirements for Wire Physical
12、 Requirementsfor Wire7.1 Tensile Properties:7.1.1 The zinc-coated wire used in the parallel wire strandshall, prior to fabrication, conform to the mechanical propertiesin Table 4. In this case the prestretching provision of the testsample of 7.1.2 is not permitted.1This specification is under the ju
13、risdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products, and is the direct responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved November 1, 2004. Published November 2004.Originally approved in 1968. Last previous edition approved in 2004 as A 586 -
14、04.2For 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.1*A Summary of Changes section appears at the end of this
15、standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.2 The zinc-coated wire used in the helical wire strandshall conform to the mechanical properties in Table 4 prior tofabrication. The wire test sample shall be prestretched,
16、at themanufacturers option to 55 % of the minimum tensile strengthspecified in Table 4 prior to conducting the tests.7.1.3 The tensile strength and the stress at 0.7 % extensionshall be based on the actual cross-sectional area of the finishedwire, including the zinc coating.7.1.4 Test SpecimensThe t
17、est specimens shall be free ofbends or kinks other than the curvature resulting from the usualcoiling operation. The 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 satisfactor
18、y means.7.2 Stress at 0.7 % Extension Under LoadThe value ofstress at 0.7 % extension under load shall be determined by oneof the following procedures, depending on the type of exten-someter used:7.2.1 Non-Autographic ExtensometerWhen a non-autographic extensometer is used to measure the 0.7 % exten
19、-sion, it shall have a gage length of 10 in. 254 mm, and it shallbe so graduated that the smallest division corresponds to astrain not larger than 0.0001 in./in. 0.0001 mm/mm of gagelength. Apply a load corresponding to the tensile stressTABLE 1 Properties of Zinc-Coated Steel Structural StrandNomin
20、alDiameter, in.Minimum Breaking Strength in Tons of 2000 lbApproxGrossMetallicArea, in.2ApproxWeight,lb/ftGrade 1 Grade 2Class ACoatingThroughoutClass ACoatingInnerWires,Class BCoatingOuterWiresClass ACoatingInnerWires,Class CCoatingOuterWiresClass ACoatingThroughout12 15.0 14.5 14.2 17.3 0.15 0.529
21、16 19.0 18.4 18.0 21.9 0.19 0.6658 24.0 23.3 22.8 27.6 0.23 0.821116 29.0 28.1 27.5 33.4 0.28 0.9934 34.0 33.0 32.3 39.1 0.34 1.21316 40.0 38.8 38.0 46.0 0.40 1.478 46.0 44.6 43.7 52.9 0.46 1.61516 54.0 52.4 51.3 62.1 0.53 1.91 61.0 59.2 57.9 70.2 0.60 2.11116 69.0 66.9 65.5 79.4 0.68 2.4118 78.0 75
22、.7 74.1 89.7 0.76 2.71316 86.0 83.4 81.7 98.9 0.85 3.0114 96.0 94.1 92.2 110 0.94 3.31516 106 104 102 122 1.0 3.6138 116 114 111 133 1.1 4.01716 126 123 121 145 1.2 4.3112 138 135 132 159 1.4 4.71916 150 147 144 173 1.5 5.1158 162 159 155 186 1.6 5.611116 176 172 169 202 1.7 6.0134 188 184 180 216 1
23、.8 6.411316 202 198 194 232 2.0 6.9178 216 212 207 248 2.1 7.411516 230 226 221 265 2.3 7.92 245 241 238 282 2.4 8.42116 261 257 253 300 2.6 8.9218 277 273 269 319 2.7 9.52316 293 289 284 337 2.9 10214 310 305 301 357 3.0 112516 327 322 317 376 3.2 11238 344 339 334 396 3.4 122716 360 355 349 414 3.
24、6 12212 376 370 365 432 3.8 132916 392 386 380 451 3.9 14258 417 411 404 480 4.1 1421116 432 425 419 497 4.3 15234 452 445 438 520 4.5 16278 494 486 479 568 5.0 173 538 530 522 619 5.4 19318 584 575 566 672 5.9 21314 625 616 606 719 6.3 22338 673 663 653 774 6.8 24312 724 714 702 833 7.4 26358 768 7
25、57 745 883 7.9 28334 822 810 797 945 8.4 30378 878 865 852 1010 9.0 324 925 911 897 1060 9.6 34A 586 04a2indicated in Table 5, using the nominal diameter of thespecimen. Maintain this load while a 10-in. extensometer isattached and adjusted to the initial setting shown in Table 5.Then increase the l
26、oad uniformly until the extensometerindicates an extension of 0.07 in. 1.78 mm or 0.7 % exten-sion. Record the load for this extension. The stress correspond-ing to this load shall meet the requirements for the stress of0.7 % extension specified in Table 4, depending on the class ofcoating under con
27、sideration. Hold the specimen at 0.7 %extension under load and remove the extensometer used tomeasure the stress at 0.7 % extension; then replace it with anelongation extensometer. Continue the application of load untilfracture occurs. Record the elongation attained from theelongation extensometer a
28、nd add to it 0.7 % obtained from thestress at 0.7 % extensometer to get the total elongation.7.2.2 Autographic ExtensometerWhen an autographic ex-tensometer is used, it shall have a gage length of at least 2 in.50.8 mm and the magnification of strain shall not be less than250. Apply a load, correspo
29、nding to the tensile stress indicatedin Table 5, using the nominal diameter of the specimen.Maintain this load and attach the extensometer. Then increasethe load uniformly until the extension recorded by the exten-someter is at least 0.7 %. Determine the load at 0.7 % exten-sion from the load-strain
30、 curve. The stress corresponding toTABLE 2 Properties of Zinc-Coated Steel Structural StrandNominalDiameter,mmApproximate Minimum Breaking Strength in KilonewtonsApproxGrossMetallicArea,mm2ApproxWeight,kg/mGrade 1 Grade 2Class ACoatingThroughoutClass ACoatingInnerWires,Class BCoatingOuterWiresClass
31、ACoatingInnerWires,Class CCoatingOuterWiresClass ACoatingThroughout12.7 133 129 126 153 97 0.7714.3 169 164 160 194 120 0.9815.9 214 207 203 246 150 1.217.5 258 250 245 297 180 1.519.1 302 294 287 348 220 1.820.6 356 345 338 409 260 2.122.2 409 397 389 471 300 2.423.8 480 466 456 552 340 2.825.4 543
32、 527 515 624 390 3.127.0 614 595 583 706 440 3.528.6 694 673 659 798 490 4.030.2 765 742 727 880 550 4.431.8 854 837 820 979 610 4.933.3 943 925 907 1090 660 5.434.9 1030 1010 988 1180 730 5.936.5 1120 1090 1080 1290 800 6.538.1 1230 1200 1170 1410 870 7.039.7 1330 1310 1280 1540 950 7.641.3 1440 14
33、10 1380 1650 1000 8.342.9 1570 1530 1500 1800 1100 8.944.5 1670 1640 1600 1920 1200 9.646.0 1800 1760 1730 2060 1300 1047.6 1920 1890 1840 2210 1400 1149.2 2050 2010 1970 2360 1500 1250.8 2180 2140 2120 2510 1500 1352.4 2320 2290 2250 2670 1600 1354.0 2460 2430 2390 2840 1700 1455.6 2610 2570 2530 3
34、000 1900 1557.2 2760 2710 2680 3180 2000 1658.7 2910 2860 2820 3350 2100 1760.3 3060 3020 2970 3520 2200 1861.9 3200 3160 3100 3680 2300 1963.5 3350 3290 3250 3840 2400 2065.1 3490 3430 3380 4010 2500 2166.7 3710 3660 3590 4270 2700 2268.3 3840 3780 3730 4420 2800 2369.9 4020 3960 3900 4630 2900 247
35、3.0 4390 4320 4260 5050 3200 2676.2 4790 4720 4640 5510 3500 2879.4 5200 5120 5040 5980 3800 3182.6 5560 5480 5390 6400 4100 3385.7 5990 5900 5810 6890 4400 3688.9 6440 6350 6250 7410 4700 3892.1 6830 6730 6630 7860 5100 4195.3 7310 7210 7090 8410 5400 4498.4 7810 7700 7580 8990 5800 47102 8230 8100
36、 7980 9430 6200 50A 586 04a3this load shall meet the requirements for stress at 0.7 %extension prescribed in Table 4, depending on the class ofcoating under consideration. Hold the specimen at 0.7 %extension under load and remove the extensometer used tomeasure the stress at 0.7 % extension; then re
37、place it with anelongation extensometer. Continue the application of load untilfracture occurs. Record the elongation attained from theelongation extensometer and add to it 0.7 % obtained from thestress at 0.7 % extensometer to get the total elongation.NOTE 2The extensometer used for the stress at 0
38、.7 % extension andthe elongation extensometer may be the same instrument. Two separateinstruments are advisable since the more sensitive stress at 0.7 %extensometer that could be damaged when the wire fractures may beremoved following the determination of the 0.7 % extension. The elon-gation extenso
39、meter may be constructed with less sensitive parts or beconstructed in such a way that little damage would result if fracture occurswhile the extensometer is attached to the specimen.7.3 ElongationIn determining total elongation (elasticplus plastic extension) use either autographic or extensometerm
40、ethods. If fracture takes place outside the middle third of thegage length, the elongation value obtained is not necessarilyrepresentative of the material.7.4 Tensile StrengthThe tensile strength is determinedfrom the maximum load during the total elongation test.7.5 Ductility of SteelThe zinc-coate
41、d wire, prior to fabri-cation into strand, shall be capable of being wrapped two turnsin a close helix at a rate not exceeding 15 turns per minutearound a cylindrical steel mandrel equal to three times thenominal diameter of the wire under test without fracture of thewire.7.6 Weight of Zinc CoatingT
42、he weight of zinc coating onthe individual wires prior to fabrication of strand shall be notless than that specified in Table 3.7.7 Adherence of CoatingThe zinc-coated wire, prior tofabrication into strand, shall be capable of being wrapped twoturns in a close helix at a rate not exceeding 15 turns
43、per minutearound a cylindrical steel mandrel equal to five times thenominal diameter of the wire under test without cracking orflaking the zinc coating to such an extent that any zinc can beremoved by rubbing with the bare fingers. Loosening ordetachment during the adherence test of superficial smal
44、lparticles of zinc formed by mechanical polishing of the surfaceof zinc-coated wire shall not be considered cause for rejection.TABLE 3 Minimum Weight of CoatingNominal Diameter of Coated WireWeight of Zinc Coating, minoz/ft2of Uncoated Wire Surface g/m2of Uncoated Wire Surfacein. mm Class ACoatingC
45、lass BCoatingClass CCoatingClass ACoatingClass BCoatingClass CCoating0.040 to 0.061, incl 1.016 to 1.549, incl 0.40 0.80 1.20 122 244 3660.062 to 0.079, incl 1.575 to 2.007, incl 0.50 1.00 1.50 153 305 4580.080 to 0.092, incl 2.032 to 2.337, incl 0.60 1.20 1.80 183 366 5490.093 to 0.103, incl 2.362
46、to 2.616, incl 0.70 1.40 2.10 214 427 6410.104 to 0.119, incl 2.642 to 3.023, incl 0.80 1.60 2.40 244 488 7320.120 to 0.142, incl 3.048 to 3.607, incl 0.85 1.70 2.55 259 519 7780.143 to 0.187, incl 3.632 to 4.750, incl 0.90 1.80 2.70 275 549 8240.188 and largerA4.775 and largerA1.00 2.00 3.00 305 61
47、0 915AThis is not to imply that larger wire will be manufactured to any unlimited diameter. It only implies that the wire sizes chosen by the strand manufacturer must meetthe requirements of this specification.TABLE 4 Mechanical RequirementsZinc CoatingClassNominal DiameterStress at 0.7 %ExtensionUn
48、der Load, minTensile Strength, minTotal Elonga-tionin10in.or250 mm, min,%in. mm psi MPa psi MPaA 0.040 to 0.110 1.016 to 2.794 150 000 1030 220 000 1520 2.00.111 and largerA2.820 and largerA160 000 1100 220 000 1520 4.0B 0.090 and largerA2.286 and largerA150 000 1030 210 000 1450 4.0C 0.090 and larg
49、erA2.286 and largerA140 000 970 200 000 1380 4.0AThis is not to imply that larger wire will be manufactured to any unlimited diameter. It only implies that the wire sizes chosen by the strand manufacturer must meetthe requirements of this specification.TABLE 5 Initial Settings for Determining Stress at 0.7 % ExtensionNominal Diameter Initial Stress Initial Setting of Extensometer, in./in.or mm/mmin. mm ksi MPa0.040 to 0.089, incl 1.070 to 2.26, incl 14 100 0.0005 (0.05 % extension)0.090 to 0.119, incl 2.29 to 3.0
