Designati Desi gnation: on: A 475 – 03
Standard Specification for
Zinc-Coated Steel Wire Strand 1 This standard is issued under the fixed designation A 475; the number immediately following the designation indicates the year of 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 supers cript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
1. Scope Scope* * 1.1 Thi Thiss spe specifi cificat cation ion cov covers ers five gra grades des of zin zinc-c c-coat oated, ed, 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 covered are as follows: follows: 1.2.1 Util Utilitie ities, s, 1.2.2 Comm Common, on, 1.2.3 Siemens-Marti Siemens-Martin, n, 1.2.4 HighHigh-Stre Strength, ngth, and 1.2.5 Extra High-Streng High-Strength. th. 1.2.6 Mini Minimum mum breaking breaking strengths strengths of stran strand d for each grade are described in Section 7. 1.3 1. 3 Th Thee fo four ur we weig ight htss of zi zinc nc co coat atin ings gs ar are: e: Cl Clas asss 1 an and d Classes A, B, and C. Minimum weights of zinc coatings are described in Section 10 10.. 1.4 The values stated in in inch-pound units are to be regarded as the standard. The values given in brackets are for information only. 2. Referenced Documents 2.1 ASTM Standards: 2 A 90/A 90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zonc-Alloy Coatings A 902 Terminology Relating to Metallic Coated Steel Products B 6 Specification for Zinc 3. Terminology 3.1 Defini Definition tions—For s—For definition definitionss of terms used in this stan stan-dard, refer to Terminology A 902. 902. 3.2 Definitions of Terms Specific to This Standard: 3.2.1 strand —the —the designation of the finished strand shall be expressed as the nominal diameter of the strand, the number of 1
Thiss spe Thi specific cificatio ation n is und under er the juri jurisdi sdictio ction n of ASTM Com Commit mittee tee A05 on Metallic Coated Iron and Steel Pro Metallic Produc ducts ts and is the direct responsibi responsibility lity of Subcommittee A05.12 on Wire Specifications. Current edition approved October 1, 2003. Published December 2003. Originally approved in 1962. Last previous edition approved in 1998 as A 475 - 98. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@
[email protected] astm.org. g. For For Annual Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website website..
the wires in the strand, the minimum breaking strength of the strand (see Section 7 Section 7), ), and the class of coating (see Section 10 Section 10). ). 4. Ordering Information Information 4.1 Orders for material material under this specification specification shall include include the following information: 4.1.1 Quant Quantity ity of strand in feet, 4.1.2 Nominal strand diameter, diameter, number of wires, wires, grade, and minimum breaking strength of strand (Section 7 and Table 1), 1), 4.1.3 Weight (class) (class) of zinc coati coating ng (Sect (Section ion 10 and and Table Table 2), 4.1.4 Lengt Length h of stran strand d in coil coilss or on reels (Section (Section 18 18), ), and 4.1.5 ASTM designatio designation n and year of issue. 5. Mate Material rialss and Manufacture Manufacture 5.1 The base metal shall be steel made made by any commercially accepted steel making process and of such quality and purity that, when drawn to the size of wire specified and coated with zinc, the finished strand and the individual wires shall be of uniform quality and have the properties and characteristics as prescribed in this specification. 5.2 The slab zinc, when used for the coating, coating, shall be any grade of zinc conforming to Specification B 6. 6. 6. Stra Stranding nding 6.1 Unless otherwise specified, strand shall shall have a left left lay. lay. A left lay is defined as a counter-clockwise twist away from the observer obse rver.. All wires shall be stra stranded nded with unifo uniform rm tensi tension. on. Stranding shall be sufficiently close to ensure no appreciable reduction in diameter when stressed to 10 % of the minimum breaking strength. 6.2 The 3-wire strand shall consist consist of thre threee wire wiress conce concenntrically twisted with a uniform pitch of not less than 14 nor more than 203 the specified nominal diameter of the strand. 6.3 The 7-wire strand strand shall consist consist of a center wire with a 6-wire layer concentrically twisted over it with a uniform pitch of not more than 16 3 the specified nominal diameter of the strand. 6.4 The 19-wire 19-wire strand shall consist consist of a cent center er wire with a 6-wire layer concentrically twisted over it, having a right lay and an d a un unif ifor orm m pi pitc tch h of no nott mo more re th than an 163 the nomi nominal nal diame dia meter ter of thi thiss 7-w 7-wire ire cor core. e. The nom nomina inall dia diamet meter er of thi thiss 7-wire core shall be considered to be 3 3 the nominal diameter
*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.
1 Copyright by ASTM Int'l (all rights reserved); Wed May 10 14:33:45 EDT 2006 Reproduction authorized per License Agreement with MURRAY M SOMMER (THE WIRE SOURCE LLC);
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A 475 – 03 TABLE 2 Nomi Nominal nal Diameters Diameters and Minimum Minimum Weights of Coating Coating for Zinc-Coated Steel WiresA Nominal Diameter of Coated Wire in the Strand, in. [mm]
Minimum Weight of Coating, oz/ft 2 [g/m 2] of Uncoated Wire Surface Class 1B
Class AC
Class BD
Class CD
0.041 0.052 0.062 0.065 0.072
[1.04] [1.32] [1.57] [1.65] [1.83]
0.15 0.15 0.15 0.15 0.15
[46] [46] [46] [46] [46]
0.40 0.40 0.50 0.50 0.50
[122] [122] [153] [153] [153]
0.80 0.80 1.00 1.00 1.00
[244] [244] [305] [305] [305]
1.20 1.20 1.50 1.50 1.50
[366] [366] [458] [458] [458]
0.080 0.093 0.100 0.104 0.109
[2.03] [2.36] [2.54] [2.64] [2.77]
0.30 0.30 0.30 0.30 0.30
[92] [92] [92] [92] [92]
0.60 0.70 0.70 0.80 0.80
[183] [214] [214] [244] [244]
1.20 1.40 1.40 1.60 1.60
[366] [427] [427] [488] [488]
1.80 2.10 2.10 2.40 2.40
[549] [641] [641] [732] [732]
0.113 [2.87] 0.120 [3.05] 0.125 [3.18] 0.130 [3.30] 0.143 [3.63] 0.145 [3.68]
0.30 0.30 0.30 0.30 0.40 0.40
[92] [92] [92] [92] [122] [122]
0.80 0.85 0.85 0.85 0.90 0.90
[244] [259] [259] [259] [275] [275]
1.60 1.70 1.70 1.70 1.80 1.80
[488] [519] [519] [519] [549] [549]
2.40 2.55 2.55 2.55 2.70 2.70
[732] [778] [778] [778] [824] [824]
0.150 0.161 0.165 0.177 0.179
0.40 0.40 0.40 0.40 0.40
[122] [122] [122] [122] [122]
0.90 0.90 0.90 0.90 0.90
[275] [275] [275] [275] [275]
1.80 1.80 1.80 1.80 1.80
[549] [549] [549] [549] [549]
2.70 2.70 2.70 2.70 2.70
[824] [824] [824] [824] [824]
[3.81] [4.09] [4.19] [4.50] [4.55]
0.188 [4.78] 0.200 [5.08] 0.207 [5.26]
0.40 [122] 0.40 [122] 0.40 [122]
1.00 [305] 1.00 [305] 1.00 [305]
2.00 [610] 2.00 [610] 2.00 [610]
3.00 [915] 3.00 [915] 3.00 [915]
A For intermediate sizes of wire in the strand, the weight designations are the same as for the next finer size shown in this table. B Class 1 (formerly “galvanized”) coating applies to common grade of strand only. C Class A, “extra galvanized” and “double galvanized” are equivalent terms. D Class A, Class B, and Class C coatings apply to all grades of strand.
of the wires. A 12-wire outer layer, having a left lay shall be concentrically twisted over the 7-wire core and shall have a unifor uni form m pit pitch ch of not more than 16 3 the spec specified ified nomin nominal al diameter of the strand. 6.5 The 37-wire 37-wire strand shall consist consist of a cente centerr wire with a 6-wire layer concentrically twisted over it, having a left lay and a uniform pitch of not more than 16 3 the nominal diameter of this 7-wire inner core. The nominal diameter of this 7-wire inner core shall be considered to be 3 3 the nominal diameter of the wire. An intermediate layer of 12 wires having a right lay shall be concentrically twisted over this 7-wire core and shall have ha ve a un unif ifor orm m pi pitc tch h of no nott mo more re th than an 163 the nomin nominal al diameter of this 19-wire core. The nominal diameter of this 19-wire core shall be considered as 5 3 the nominal diameter of the wires. An 18-wire outer layer, having a left lay shall be concentrically twisted over the 19-wire core and shall have a unifor uni for pit pitch ch of not more than 16 3 the ified nomin nominal al
7. Breaking Strength Strength and Weight Weight 7.1 The approximate approximate weight weight per unit length length of stra strand nd and the minimum breaking strength of the finished strand shall be as specified in Table in Table 1. 1. 7.2 7. 2 A te test st in wh whic ich h th thee br brea eaki king ng st stre reng ngth th is be belo low w th thee minimum specified and which may have been caused by the slipping of the specimen in the jaws of the testing machine, by breaking within the jaws or within 1 in. [25.4 mm] of the jaws, or by the improper improper socketin socketing g of a spe specim cimen en sha shall ll be dis disreregarded and another sample from the same coil or reel shall be tested. Tests shall be made on lengths of strand that do not contain wire joints or splices. 8. Elon Elongati gation on 8.1 The elongatio elongation n of the strand in 24 in. [610 mm] shall be not less than that specified in Table 3. 3. 8.2 8. 2 Th Thee el elon onga gati tion on sh shal alll be de dete term rmin ined ed as th thee pe perc rcen entt increase in separation between the jaws of the testing machine from the position after applicatio application n of the init initial ial load to the position at the initial failure in the test specimen. The separation of the jaws of the testing machine shall be approximately 2 ft when under an initial load equal to 10 % of the required minim mi nimum um bre breaki aking ng str streng ength th of the str strand and.. The elo elonga ngatio tion n values shall be recorded only for specimens which break over 1 in. from the jaws of the testing machine. Additional samples shall be taken from the same coil or reel when the previous tests are to be disregarded. 8.3 Elongati Elongation on tes tests ts sha shall ll be mad madee on len length gthss of str strand and which do not contain wire joints or splices. 9. Duct Ductilit ility y of Steel 9.1 The zinc-coated wire wire shall not fracture fracture when wrapped at a rate not exceeding 15 turns/min in a close helix of at least 2 turns around a cylindrical mandrel. The mandrel diameter for testing test ing comm common on and Sieme Siemens-M ns-Marti artin n grade strand shall be equal to the nominal diameter of the individual wires of the strand. The mandrel diameter for utilities, high-strength, and extra ext ra hig high-s h-stre trengt ngth h gra grade de str strand and,, sha shall ll be equ equal al to 3 3 the nominal diameter of the individual wires of the strand. 10. Weight of Coating Coating 10.1 The weight of zinc coating coating shall not be less than that specified in Table 2. 2. 10.2 The weight of the zinc coating coating shall be determined determined by a stripping test in accordance with Test Method A 90/A 90M. 90M. 11. Adher Adherence ence of Coat Coating ing 11. 1.1 1 Th Thee zi zinc nc-c -coa oate ted d wi wire re sh shal alll be ca capa pabl blee of be bein ing g wrapped at a rate not exceeding 15 turns/min in a close helix
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A 475 – 03 of at least two turns around a cylindrical mandrel equal to 3 3 the nominal diameter of the wire under test, without cracking or delaminating the zinc coating to such an extent that any zinc can be removed by rubbing with the bare fingers. Loosening or detach det achmen mentt dur during ing the adh adhesi esion on tes testt of sup superfi erficia ciall sma small ll particles of zinc formed by mechanical polishing of the surface of zinc-coated wire shall not be considered cause for rejection. 12. Joint Jointss and Splices 12.1 Elec Electric tric-weld -welded ed butt joints made prior to the start of cold drawing of the wire are permitted; however, no electricwelded wel ded butt joi joints nts shall be mad madee dur during ing the col cold d dra drawin wing g operat ope ration ion.. Ele Electr ctricic-wel welded ded but buttt joi joints nts of the wir wiree sha shall ll be permitted only as specified in 12.2 12.2.. 12.2 In 3-wire strand, strand, there shall shall be no joint jointss made in the indivi ind ividua duall fini finishe shed d wir wire. e. In 7-w 7-wire ire str strand and,, joi joints nts mad madee in individual finished wires shall be acceptable provided there is not more than one joint in any 150-ft [45.7-m] section of the completed strand and the location of each joint is marked on the str strand and wit with h pai paint nt or som somee oth other er dis distin tingui guishi shing ng mar mark. k. Factory joints made in the individual finished wires of 19 and 37-wire strand shall be kept well spaced and at a minimum in number. 12.3 Joints in the wires wires composing the strand strand shall be either the braz brazed-la ed-lap p type or elect electricric-butt butt-weld -welded ed type. When the brazed type of joint is used, the length of the lap shall be not less than 33 the diameter of the wire and the overlapping faces shall be smooth, clean, properly fluxed, and completely covered by the brazing metal. When the electric-welded type of joint is used, care shall be taken to prevent injury to the wire during electric-butt welding. All joints shall be well made and shall be coated with zinc after completion so that the joints shall have protection from corrosion equivalent to that of the zinc-coated wire itself. 12.4 There shall shall be no stra strand nd joints or strand strand splices splices in any length of the completed strand unless specifically permitted by the purchaser. 13. Permissible Variations Variations in Size 13.1 The dia 13.1 diame meter ter of the zin zinc-c c-coat oated ed wir wiree for formi ming ng the strand specified in Table in Table 1 shall 1 shall be within the limits prescribed in Table in Table 4. 4. 14. Wo Workmanship rkmanship 14.1 The zinc-coated wire wire shall be free of imperfections not consistent with good commercial practice. The coating shall be continuous and reasonably uniform. TABLE 4 Permissible Variati Variations ons in Diameter of Individual ZincCoated WiresA Nominal Diameter of Coated Wires in the Strand, in. [mm]
Permissible Vari Variations, ations, 6in. [mm]
15. Sampl Sampling ing 15.1 15. 1 Sam Sampli pling ng for det determ ermina inatio tion n of com compli plianc ancee to thi thiss specification shall be performed on each lot of material. A lot shall consist of all the strand of one size and one grade in each shipm shi pment ent.. The number number of sam sample pless to be tak taken en sha shall ll be as follows: 5000 ft [1524 m] or less Over 5000 to 30 000 ft [1524 to 9144 m] Over 30 000 to 150 000 ft [9144 to 45 720 m] Over 150 000 ft [45 720 m]
Number of Samples 1 2 3 4
15.2 Each 15.2 Each sa samp mple le ta take ken n sh shal alll be su subj bjec ecte ted d to al alll te test stss prescribed in Sections 6, 7, and 8. 15.3 In addition addition to the stra strand nd testing in 15.2 in 15.2,, the individual wires shall be tested. The number of individual wires to be selected from each sample of strand and tested to determine compliance with Sections 9 Sections 9,, 10 10,, 11 11,, and 13 and 13 shall shall be as follows: 3-wire strand—3 wires 7-wire strand—4 wires 19-wire strand—3 wires from each layer (total of 6 wires) 37-wire strand—3 wires from each layer (total of 9 wires) 15.3.1 Indiv Individual idual wire samp samples les selected for comp complian liance ce to Section 13 shall shall be dis discar carded ded if any dis distor tortio tion n of the wire occurred during the stranding operation. 15.4 Inst Instead ead of test testing ing the wires from the compl completed eted strand strand in accordance with 15.3, 15.3, the producer may elect to establish compliance with Sections 9 Sections 9,, 10 10,, 11 11,, and 13 and 13 of of this specification by tests made on the wires prior to stranding, unless otherwise stipulated by the purchaser. However, if the producer makes this election, the purchaser still reserves the right to test wires from the completed strand for compliance. 16. Inspe Inspectio ction n 16.1 The manufacturer shall afford afford the inspector representing the purchaser all reasonable facilities to satisfy him that the material is being furnished in accordance with this specification. All tests and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shall be so conducted as not to interfere unnecessarily with the operation of the works. 17. Reje Rejection ction 17.1 If the wire or strand fails in the first test to meet any requirement of this specification, two additional tests shall be made on samples of wire or strand from the same coil or reel. If failure occurs in either of these tests, the lot of wire or strand shall be rejected. 18. Packa Packaging ging and Package Marking Marking
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A 475 – 03 18.1.1 Stand Standard ard lengths lengths of stran strand d are as follows: follows: 250, 500, 1000, 2500, and 5000 ft [76, 152, 304, 760, and 1520 m]. 16 in. [11.11 18.1.2 Standard practice practice is to furnish all strand 7 ⁄ 16 mm] and over in diameter on reels in lengths of 1000 ft [304 m] and over. Strand lengths of less than 1000 ft are regularly furnished in coils. 18.2 Each coil or reel shall have a strong weather-res weather-resista istant nt tag securely fastened to it showing the length, nominal diam-
eter, number of wires, grade of the strand, class of coating, ASTM AS TM Sp Spec ecifi ifica cati tion on A 47 475, 5, an and d th thee na name me or ma mark rk of th thee manufacturer. If additional information is required on the tag, it shall be so specified at the time of purchase. 19. Keyw Keywords ords 19.1 stee steell wire strand; strand; wire; zinc-coat zinc-coated ed steel wire stran strand d
SUMMARY OF CHANGES Committee A05 has identified the location of selected changes to this standard since the last issue (A 475 - 98) that may impact the use of this standard. A 475 - 03: (1) Renumbered sections to meet Form and Style requirements. (2) Editorial changes were made in paragraphs 2.1, 3.2.1, 4.1.3, 7.1, 8.3, 10.1, 10.2, 11.1, 18.2, Section 17, and Table 1. (3) Changed Type 1 to Class 1 in paragraph 1.3 and Table 2 (4) Added paragraph 4.1.5. (5) Changed “base metal” in paragraph 5.1 to “any commer-
cially accepted steel making process.” (6 ) Incorporated Note 1 into paragraph 15.3.1. (7 ) Incorporated Note 2 into paragraph 11.1. (8) Changed Section 14 from “Finish” to “Workmanship.” (9) Changed “kg/304.8m” to “kg/km” in Column 4 heading and changed the metric values in Column 4 in Table 1. (10) Added Summary of Changes section.
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