1、Designation: A475 03 (Reapproved 2014)Standard Specification forZinc-Coated Steel Wire Strand1This standard is issued under the fixed designation A475; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers five grades of zinc-coate
3、d,steel wire strand, composed of a number of round, steel wires,with four weights of zinc coatings, suitable for use as guys,messengers, span wires, and for similar purposes.1.2 The five grades covered are as follows:1.2.1 Utilities,1.2.2 Common,1.2.3 Siemens-Martin,1.2.4 High-Strength, and1.2.5 Ext
4、ra High-Strength.1.2.6 Minimum breaking strengths of strand for each gradeare described in Section 7.1.3 The four weights of zinc coatings are: Class 1 andClasses A, B, and C. Minimum weights of zinc coatings aredescribed in Section 10.1.4 The values stated in inch-pound units are to be regardedas s
5、tandard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy Coatings
6、A902 Terminology Relating to Metallic Coated Steel Prod-uctsB6 Specification for Zinc3. Terminology3.1 DefinitionsFor definitions of terms used in thisstandard, refer to Terminology A902.3.2 Definitions of Terms Specific to This Standard:3.2.1 strandthe designation of the finished strand shall beexp
7、ressed as the nominal diameter of the strand, the number ofthe wires in the strand, the minimum breaking strength of thestrand (see Section 7), and the class of coating (see Section 10).4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1
8、.1 Quantity of strand in feet,4.1.2 Nominal strand diameter, number of wires, grade, andminimum breaking strength of strand (Section 7 and Table 1),4.1.3 Weight (class) of zinc coating (Section 10 and Table2),4.1.4 Length of strand in coils or on reels (Section 18), and4.1.5 ASTM designation and yea
9、r of issue.5. Materials and Manufacture5.1 The base metal shall be steel made by any commerciallyaccepted steel making process and of such quality and puritythat, when drawn to the size of wire specified and coated withzinc, the finished strand and the individual wires shall be ofuniform quality and
10、 have the properties and characteristics asprescribed in this specification.5.2 The slab zinc, when used for the coating, shall be anygrade of zinc conforming to Specification B6.6. Stranding6.1 Unless otherwise specified, strand shall have a left lay.Aleft lay is defined as a counter-clockwise twis
11、t away from theobserver. All wires shall be stranded with uniform tension.Stranding shall be sufficiently close to ensure no appreciablereduction in diameter when stressed to 10 % of the minimumbreaking strength.6.2 The 3-wire strand shall consist of three wires concen-trically twisted with a unifor
12、m pitch of not less than 14 normore than 20 the specified nominal diameter of the strand.6.3 The 7-wire strand shall consist of a center wire with a6-wire layer concentrically twisted over it with a uniform pitchof not more than 16 the specified nominal diameter of thestrand.1This specification is u
13、nder the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Productsand is the direct responsibility of Subcom-mittee A05.12 on Wire Specifications.Current edition approved Aug. 1, 2014. Published September 2014. Originallyapproved in 1962. Last previous edition approved in 2009 as
14、A475 - 03 (2009)1.DOI: 10.1520/A0475-03R14.2For 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.Copyright ASTM Int
15、ernational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1TABLE1PhysicalPropertiesofZinc-CoatedSteelWireStrandNOTE1Thenumbersinboldfacetypeindicatesizesandgradesmostcommonlyusedandreadilyavailable.NominalDiameterofStrand,in.(mm)Number ofWiresinStrandNominalDiame
16、terofCoatedWiresinStrand,in.(mm)ApproximateWeightofStrand, lb/1000ft(kg/km)MinimumBreakingStrengthofStrand,lbf(kN)UtilitiesGradeACommonGradeSiemens-Martin GradeHigh-StrengthGradeExtraHigh-StrengthGrade18(3.18)70.041(1.04)32(48).540(2.402)910(4.048)1330(5.916)1830(8.140)532(3.97)70.052(1.32)51(76).87
17、0(3.870)1470(6.539)2140(9.519)2940(13.078)316(4.76)70.062(1.57)73(109).1150(5.115)1900(8.452)2850(12.677)3990(17.748)316(4.76)70.065(1.65)80(119)2400(10.676)(1)B.732(5.56)30.104(2.64)88(131).1400(6.228)2340(10.409)3500(15.569)4900(21.796)732(5.56)70.072(1.83)98(146).1540(6.850)2560(11.387)3850(17.12
18、6)5400(24.020)14(6.35)30.120(3.05)117(174)3150(14.012)(2)B1860(8.274)3040(13.523)4730(21.040)6740(29.981)14(6.35)30.120(3.05)117(174)4500(20.017)(3)B.14(6.35)70.080(2.03)121(180).1900(8.452)3150(14.012)4750(21.129)6650(29.581)932(7.14)30.130(3.30)137(204).2080(9.252)3380(15.035)5260(23.398)7500(33.3
19、62)932(7.14)70.093(2.36)164(244)4600(20.462)(1)B2570(11.432)4250(18.905)6400(28.469)8950(39.812)516(7.94)30.145(3.68)171(255)6500(28.913)(3)B2490(11.076)4090(18.193)6350(28.246)9100(40.479)516(7.94)70.104(2.64)205(305).3200(14.234)5350(23.798)8000(35.586)11200(49.820)516(7.94)70.109(2.77)225(335)600
20、0(26.689)(1)B.38(9.52)30.165(4.19)220(328)8500(37.810)(3)B3330(14.813)5560(24.732)8360(37.187)11800(52.489)38(9.52)70.120(3.05)273(407)11500(51.155)(4)B4250(18.905)6950(30.915)10800(48.040)15400(68.503)716(11.11)70.145(3.68)399(595)18000(80.068)(4)B5700(25.355)9350(41.591)14500(64.499)20800(92.523)1
21、2(12.70)70.165(4.19)517(770)25000(111.206)(4)B7400(32.917)12100(53.823)18800(83.627)26900(119.657)12(12.70)190.100(2.54)504(751).7620(33.895)12700(56.492)19100(84.961)26700(118.768)916(14.29)70.188(4.78)671(1000).9600(42.703)15700(69.837)24500(108.981)35000(155.688)916(14.29)190.113(2.87)637(949).96
22、40(42.881)16100(71.616)24100(107.202)33700(149.905)58(15.88)70.207(5.26)813(1211).11600(51.599)19100(84.961)29600(131.667)42400(188.605)58(15.88)190.125(3.18)796(1186).11000(48.930)18100(80.513)28100(124.995)40200(178.819)34(19.05)190.150(3.81)1155(1721).16000(71.172)26200(116.543)40800(181.487)5830
23、0(259.331)78(22.22)190.177(4.50)1581(2356).21900(97.416)35900(159.691)55800(248.211)79700(354.523)1(25.40)190.200(5.08)2073(3089).28700(127.664)47000(209.066)73200(325.610)104500(464.839)1(25.40)370.143(3.63)2057(3065).28300(125.885)46200(205.508)71900(319.827)102700(456.832)118(28.58)370.161(4.09)2
24、691(4010).36000(160.136)58900(262.000)91600(407.457)130800(581.827)114(31.75)370.179(4.55)3248(4840).44600(198.391)73000(324.720)113600(505.318)162200(721.502)ATheutilitiesgradeisusedprincipallybycommunicationandpowerandlightindustries.BRefertoelongationrequirementsspecifiedinSection8.A475 03 (2014)
25、26.4 The 19-wire strand shall consist of a center wire with a6-wire layer concentrically twisted over it, having a right layand a uniform pitch of not more than 16 the nominal diameterof this 7-wire core. The nominal diameter of this 7-wire coreshall be considered to be 3 the nominal diameter of the
26、 wires.A 12-wire outer layer, having a left lay shall be concentricallytwisted over the 7-wire core and shall have a uniform pitch ofnot more than 16 the specified nominal diameter of the strand.6.5 The 37-wire strand shall consist of a center wire with a6-wire layer concentrically twisted over it,
27、having a left lay anda uniform pitch of not more than 16 the nominal diameter ofthis 7-wire inner core. The nominal diameter of this 7-wireinner core shall be considered to be 3 the nominal diameter ofthe wire. An intermediate layer of 12 wires having a right layshall be concentrically twisted over
28、this 7-wire core and shallhave a uniform pitch of not more than 16 the nominaldiameter of this 19-wire core. The nominal diameter of this19-wire core shall be considered as 5 the nominal diameter ofthe wires. An 18-wire outer layer, having a left lay shall beconcentrically twisted over the 19-wire c
29、ore and shall have auniform pitch of not more than 16 the specified nominaldiameter of the strand.6.6 All wires in the strand shall lie naturally in their truepositions in the completed strand and, when the strand is cut,the ends shall remain in position or be readily replaced by handand then remain
30、 in position. This may be accomplished by anymeans or process, such as preforming, post forming, or formsetting.7. Breaking Strength and Weight7.1 The approximate weight per unit length of strand andthe minimum breaking strength of the finished strand shall beas specified in Table 1.7.2 A test in wh
31、ich the breaking strength is below theminimum specified and which may have been caused by theslipping of the specimen in the jaws of the testing machine, bybreaking within the jaws or within 1 in. (25.4 mm) of the jaws,or by the improper socketing of a specimen shall be disre-garded and another samp
32、le from the same coil or reel shall betested. Tests shall be made on lengths of strand that do notcontain wire joints or splices.8. Elongation8.1 The elongation of the strand in 24 in. (610 mm) shall benot less than that specified in Table 3.8.2 The elongation shall be determined as the percentincre
33、ase in separation between the jaws of the testing machinefrom the position after application of the initial load to theposition at the initial failure in the test specimen. The separa-tion of the jaws of the testing machine shall be approximately2 ft when under an initial load equal to 10 % of the r
34、equiredminimum breaking strength of the strand. The elongationvalues shall be recorded only for specimens which break over1 in. from the jaws of the testing machine. Additional samplesshall be taken from the same coil or reel when the previoustests are to be disregarded.8.3 Elongation tests shall be
35、 made on lengths of strandwhich do not contain wire joints or splices.9. Ductility of Steel9.1 The zinc-coated wire shall not fracture when wrapped ata rate not exceeding 15 turns/min in a close helix of at least 2turns around a cylindrical mandrel. The mandrel diameter fortesting common and Siemens
36、-Martin grade strand shall beequal to the nominal diameter of the individual wires of thestrand. The mandrel diameter for utilities, high-strength, andextra high-strength grade strand, shall be equal to 3 thenominal diameter of the individual wires of the strand.10. Weight of Coating10.1 The weight
37、of zinc coating shall not be less than thatspecified in Table 2.TABLE 2 Nominal Diameters and Minimum Weights of Coatingfor Zinc-Coated Steel WiresANominal Diam-eter of CoatedWire in theStrand, in.(mm)Minimum Weight of Coating, oz/ft2(g m2) of Uncoated WireSurfaceClass 1BClass ACClass BDClass CD0.04
38、1 (1.04) 0.15 (46) 0.40 (122) 0.80 (244) 1.20 (366)0.052 (1.32) 0.15 (46) 0.40 (122) 0.80 (244) 1.20 (366)0.062 (1.57) 0.15 (46) 0.50 (153) 1.00 (305) 1.50 (458)0.065 (1.65) 0.15 (46) 0.50 (153) 1.00 (305) 1.50 (458)0.072 (1.83) 0.15 (46) 0.50 (153) 1.00 (305) 1.50 (458)0.080 (2.03) 0.30 (92) 0.60 (
39、183) 1.20 (366) 1.80 (549)0.093 (2.36) 0.30 (92) 0.70 (214) 1.40 (427) 2.10 (641)0.100 (2.54) 0.30 (92) 0.70 (214) 1.40 (427) 2.10 (641)0.104 (2.64) 0.30 (92) 0.80 (244) 1.60 (488) 2.40 (732)0.109 (2.77) 0.30 (92) 0.80 (244) 1.60 (488) 2.40 (732)0.113 (2.87) 0.30 (92) 0.80 (244) 1.60 (488) 2.40 (732
40、)0.120 (3.05) 0.30 (92) 0.85 (259) 1.70 (519) 2.55 (778)0.125 (3.18) 0.30 (92) 0.85 (259) 1.70 (519) 2.55 (778)0.130 (3.30) 0.30 (92) 0.85 (259) 1.70 (519) 2.55 (778)0.143 (3.63) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.145 (3.68) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.150 (3.81) 0.40 (122
41、) 0.90 (275) 1.80 (549) 2.70 (824)0.161 (4.09) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.165 (4.19) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.177 (4.50) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.179 (4.55) 0.40 (122) 0.90 (275) 1.80 (549) 2.70 (824)0.188 (4.78) 0.40 (122) 1.00 (305) 2.00 (6
42、10) 3.00 (915)0.200 (5.08) 0.40 (122) 1.00 (305) 2.00 (610) 3.00 (915)0.207 (5.26) 0.40 (122) 1.00 (305) 2.00 (610) 3.00 (915)AFor intermediate sizes of wire in the strand, the weight designations are the sameas for the next finer size shown in this table.BClass 1 (formerly “galvanized”) coating app
43、lies to common grade of strand only.CClass A, “extra galvanized” and “double galvanized” are equivalent terms.DClass A, Class B, and Class C coatings apply to all grades of strand.TABLE 3 Elongation Requirements for Grades of StrandGrade of Strand Elongation in 24in. (610 mm),min, %Utilities Grade (
44、1)Aand Common Strand 10Utilities Grade (2)Aand Siemens-Martin 8Utilities Grade (3)Aand High-Strength 5Utilities Grade (4)Aand Extra High-Strength 4ASee Table 1, Footnote B.A475 03 (2014)310.2 The weight of the zinc coating shall be determined bya stripping test in accordance with Test Method A90/A90
45、M.11. Adherence of Coating11.1 The zinc-coated wire shall be capable of beingwrapped at a rate not exceeding 15 turns/min in a close helixof at least two turns around a cylindrical mandrel equal to 3the nominal diameter of the wire under test, without crackingor delaminating the zinc coating to such
46、 an extent that any zinccan be removed by rubbing with the bare fingers. Loosening ordetachment during the adhesion test of superficial smallparticles of zinc formed by mechanical polishing of the surfaceof zinc-coated wire shall not be considered cause for rejection.12. Joints and Splices12.1 Elect
47、ric-welded butt joints made prior to the start ofcold drawing of the wire are permitted; however, no electric-welded butt joints shall be made during the cold drawingoperation. Electric-welded butt joints of the wire shall bepermitted only as specified in 12.2.12.2 In 3-wire strand, there shall be n
48、o joints made in theindividual finished wire. In 7-wire strand, joints made inindividual finished wires shall be acceptable provided there isnot more than one joint in any 150-ft (45.7-m) section of thecompleted strand and the location of each joint is marked onthe strand with paint or some other di
49、stinguishing mark.Factory joints made in the individual finished wires of 19 and37-wire strand shall be kept well spaced and at a minimum innumber.12.3 Joints in the wires composing the strand shall be eitherthe brazed-lap type or electric-butt-welded type. When thebrazed type of joint is used, the length of the lap shall be notless than 3 the diameter of the wire and the overlapping facesshall be smooth, clean, properly fluxed, and completely cov-ered by the brazing metal. When the electri
