1、Designation: A121 13 (Reapproved 2017)Standard Specification forMetallic-Coated Carbon Steel Barbed Wire1This standard is issued under the fixed designation A121; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. A number 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 metallic-coate
3、d steel barbedwire, consisting of a strand of two wires.1.2 The barbed wire is available with aluminum, zinc, andzinc-5 % aluminum-mischmetal alloy coatings, with a numberof coating weights, in a number of different constructions(designs), and in two grades. Not all designs are available in allcoati
4、ng types.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.4 The text of this specification references notes andfootnotes that provide explanatory information. These notesand footnotes (excluding those in tables) sh
5、all not be consid-ered as requirements of the specification.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations
6、 issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA428/A428M Test Method for Weight Mass of Coating onAluminum-Coated
7、Iron or Steel ArticlesA641/A641M Specification for ZincCoated (Galvanized)Carbon Steel WireA700 Guide for Packaging, Marking, and Loading Methodsfor Steel Products for ShipmentA809 Specification for Aluminum-Coated (Aluminized)Carbon Steel WireA856/A856M Specification for Zinc-5 % Aluminum-Mischmeta
8、l Alloy-Coated Carbon Steel WireA902 Terminology Relating to Metallic Coated Steel Prod-ucts2.2 Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)32.3 Military Standards:MIL-STD-129 Marking for Shipment and Storage3MIL-STD-163 Steel Mill Products Preparation for Shipmentand St
9、orage33. Terminology3.1 DefinitionsFor definitions of terms not specified inthis specification, refer to Terminology A902.4. Classification4.1 The barbed wire covered by this specification is classi-fied as described in this section.4.2 Design Number Numbers describing standard sizesand construction
10、s, as listed in Table 1.4.3 Metallic Coating Type:4.3.1 Coating Type A Made from aluminum-coated strandwire. See 6.3. (Only one coating weight for each wire size.)4.3.2 Coating Type Z Made from zinc-coated strand wire.See Table 2.4.3.3 Coating Type ZA Made from zinc-5 % aluminum-mischmetal alloy (Zn
11、-5AL-MM) coated strand wire. See Table3.4.4 Metallic Coating ClassThe specified amount of coat-ing (coating weight (mass) on the strand wire.4.5 Grades:4.5.1 Standard Grade Barbs spaced on 4 or 5-in. (102 or127-mm) centers as indicated in Table 1.4.5.2 High-Security GradeBarbs spaced on 3-in. (76-mm
12、)centers with Coating Type A, Z, or ZA only.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved Sept. 1, 2017. Published September 2017. Or
13、iginallyapproved in 1928. Last previous edition approved in 2013 as A121 -13. DOI:10.1520/A0121-13R17.2For 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
14、Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international s
15、tandard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1NO
16、TE 1The design numbers are related to the characteristics of theconstruction of the barbed wire, with the number groups related, in order,to the steel wire gage of the strand wires, number of barb points, spacingof barbs, steel wire gage of the barbs, and a letter indicating the shape ofthe barbs.5.
17、 Ordering Information5.1 Orders for material under this specification shall includethe following information, as necessary to describe the desiredproduct.5.1.1 Name of material (steel barbed wire),5.1.2 Quantity (number of spools and length of barbed wireon each, or total length) (see 7.5 for standa
18、rd size of spools),5.1.3 Metallic coating type (see 4.3),5.1.4 Metallic coating class (for Types Z and ZA) (see Table2 or Table 3),5.1.5 Design Number (see Table 1),5.1.6 For Coating Type A barbed wire, whether aluminumalloy barbs are required or prohibited (see 6.2.1). If not stated,the choice shal
19、l be at the manufacturers option,5.1.7 ASTM designation and year of issue, and5.1.8 Certification or test report, or both, if required.NOTE 2Atypical ordering description is as follows: Steel barbed wire,20 spools of 80 rods each, Coating Type Z, Coating Class 3, DesignNumber 12-2-4-14R, to ASTM Spe
20、cification A121-latest edition, withcertification.5.2 All spools of barbed wire accepted by the purchasershall be billed on the basis of the original length of the spoolsbefore sampling, unless changed by contractual agreement.TABLE 1 Standard Sizes and Constructions for Barbed WireDesign Number Siz
21、e, Steel Wire GageNominal Diameter of CoatedWire, in. (mm)Number of BarbPointsSpacing of Barbs,in. (mm)Diameter of Barbs, SteelWire GageAShape of BarbsMetallic Coating Type A12-4-3-14R 1212 0.099 (2.51) 4 3 (76) 14 Round12-4-5-14R 1212 0.099 (2.51) 4 5 (127) 14 Round12-4-3-12RB1212 0.099 (2.51) 4 3
22、(76) 12 RoundMetallic Coating Type Z and Type ZA12-2-4-12F 1212 0.099 (2.51) 2 4 (102) 1212CFlat12-2-4-13F 1212 0.099 (2.51) 2 4 (102) 13CFlat12-2-4-14R 1212 0.099 (2.51) 2 4 (102) 14 Round12-2-5-12F 1212 0.099 (2.51) 2 5 (127) 1212CFlat12-2-5-14R 1212 0.099 (2.51) 2 5 (127) 14 Round12-4-5-14H 1212
23、0.099 (2.51) 4 5 (127) 14CHalf-round12-4-5-14R 1212 0.099 (2.51) 4 5 (127) 14 Round13-2-4-14R 1312 0.086 (2.18) 2 4 (102) 14 Round13-4-5-14R 1312 0.086 (2.18) 4 5 (127) 14 Round14-2-4-14F 14 0.080 (2.03) 2 4 (102) 14 Flat14-2-5-14F 14 0.080 (2.03) 2 5 (127) 14 Flat14-4-3-14F 14 0.080 (2.03) 4 3 (76)
24、 14 Flat14-4-5-14F 14 0.080 (2.03) 4 5 (127) 14 Flat14-2-5-14R 14 0.080 (2.03) 2 5 (127) 14 Round14-4-5-14R 14 0.080 (2.03) 4 5 (127) 14 Round15-2-5-13F 1512 0.067 (1.70) 2 5 (127) 1334CFlat15-2-5-14R 1512 0.067 (1.70) 2 5 (127) 14 Round15-4-5-16R 1512 0.067 (1.70) 4 5 (127) 1612 Round15-4-3-16R 151
25、2 0.067 (1.70) 4 3 (76) 1612 RoundAThe nominal diameter of the wire used in making the barbs shall be as follows:1212 gage 0.099 in. (2.51 mm)13 gage 0.092 in. (2.34 mm)1334 gage 0.083 in. (2.11 mm)14 gage 0.080 in. (2.03 mm)1612 gage 0.058 in. (1.47 mm)BDesign Number 124312R, Metallic Coated Type A
26、, is High-Security Grade. All other design numbers are for standard grade.CThe gage of the half-round and flat barbs is designated by the gage of the round wire from which the barbs are rolled.TABLE 2 Minimum Weight of Coating on Type Z Barbed WireSize, SteelWire GageNominal Diameter ofType ZMinimum
27、 Weight of Coating of UncoatedWire Surface, oz/ft2(g/m2)in. (mm) Class 1 Class 31212 0.099 (2.51) 0.28 (85) 0.80 (245)13 0.092 (2.34) 0.28 (85) 0.75 (230)1312 0.086 (2.18) 0.25 (75) 0.70 (215)1334 0.083 (2.11)A0.70 (215)14 0.080 (2.03) 0.25 (75) 0.70 (215)1512 0.067 (1.70)A0.65 (200)1612 0.058 (1.47
28、)A0.60 (200)AThese sizes only furnished with Class 3 Coating (Section 8).TABLE 3 Minimum Weight of Coating on Type ZA Barbed WireSize,SteelWireGageNominal Diameter ofType ZAMinimum Weight of Coating ofUncoated Wire Surface, oz/ft2(g/m2)Classin. (mm) Class 1 Class 3 Class 601212 0.099 (2.51) 0.28 (85
29、) 0.80(245)0.60(183)13 0.092 (2.34) 0.28 (85) 0.75(230)0.60(183)1312 0.086 (2.18) 0.25 (75) 0.70(215)0.60(183)1334 0.083 (2.11) 0.25 (75) 0.70(215)0.60(183)14 0.080 (2.03) 0.25 (75) 0.70(215)0.60(183)1512 0.067 (1.70) 0.20 (61) 0.65(198)n/a1612 0.058 (1.47) 0.20 (61) 0.60(183)n/aA121 13 (2017)26. Ma
30、terial6.1 Base MetalThe base metal of the steel strand wiresand steel barbs shall be of good commercial quality carbonsteel, capable of meeting the breaking strength requirement in7.7. The base metal for aluminum barbs (permitted withmetallic Coating Type A) shall be aluminum alloy wireconforming to
31、 Alloy 5000-H38, Alloy 6061-T94, or equal.6.1.1 For Coating TypeAbarbed wire, the choice of whetheraluminum-coated steel wire or aluminum alloy wire for thebarbs shall be that of the manufacturer, unless otherwisespecified by the purchaser. If aluminum alloy wire is used, theparticular alloy shall b
32、e agreed upon between the manufacturerand the purchaser at the time the order is placed.6.2 Coating MaterialsThe coating on the wire shall con-form with the requirements of the following specifications:6.2.1 Coating Type A Aluminum-coated wire in accor-dance with Specification A809.6.2.2 Coating Typ
33、e Z Zinc-coated wire in accordance withSpecification A641/A641M.6.2.3 Coating Type ZA Zinc-5 % aluminum-mischmetalalloy (Zn-5Al-MM) coated wire in accordance with Specifica-tion A856/A856M.6.3 Coated Wire The steel wire shall be coated beforefabrication.6.3.1 Weight of Coating Requirements for Stran
34、d WiresThe strand wires for Types Z and ZA barbed wire, asrepresented by the test specimens, shall conform to therequirements of Tables 2 and 3 respectively for the minimumcoating weight for the type and class ordered. The strand wiresfor Type A barbed wire, as represented by the test specimens,shal
35、l have a minimum coating weight of 0.30 oz/ft2(90 g/m2)on the 1212 gage wire.6.3.2 Weight of Coating Requirements for BarbsThe wirefor barbs for Types Z and ZA barbed wire, as represented bythe test specimens, shall conform to the same coating classrequirements as the strand wire. The steel wire for
36、 barbs forType A barbed wire, as represented by the test specimens, shallhave a minimum coating weight of 0.25 oz/ft2(75 g/m2)onthe14gage wire.7. General Requirements7.1 The sizes and constructions for barbed wire furnishedunder this specification shall be in accordance with therequirements of Table
37、 1 for the Design Number specified in theorder, within the tolerances stated in Section 8.7.2 The barbs shall be sharp, well-formed, and tightlywrapped. The barb points shall be sharp and properly shaped.7.3 The strand wires shall be twisted with a uniform lengthof lay. Type Z and Type ZA barbed wir
38、e shall have the twistingconsistently in one direction (left or right) or alternatingbetween the left and right directions. Type A barbed wire shallhave the twisting consistently in either the left or rightdirection, with alternating of the twisting prohibited.7.4 Splicing of individual wires by mea
39、ns of a wrap joint oran electric butt weld is permitted. Not more than three splicesor joints shall exist in any spool of barbed wire. Such splices orjoints shall be made in a workmanlike manner.7.5 The barbed wire, for the various types, shall be pack-aged on spools in lengths as follows:7.5.1 Type
40、 A80 rods (1320 ft) (402 m) or 1000 ft (305 m).7.6 Types Z and ZA 80 rods (1320 ft) (402 m) or 80 rodsplus additional increments of 10 rods (165 ft) (50 m).7.7 Breaking StrengthThe breaking strength of thestranded barbed wire, for all types, shall be not less than 950lbf (4230 N). This breaking stre
41、ngth reflects that of both strandwires tested together as one unit.8. Permissible Variations in Dimensions8.1 DiameterThe permissible variation from the nominaldiameter of the wire, for both line wires and barbs, for alltypes, shall be 60.005 in. (0.13 mm)8.1.1 Due to the mechanics of manufacture wh
42、en formingthe barbs, a certain amount of out-of-roundness is expected.The size and condition precludes barbs from being subjected todiameter checks.8.2 Barb Spacing The nominal spacing of the barbs shallbe as noted in Table 1. The individual barb spacing shall bemeasured from the edge of one barb at
43、 the strand to thecorresponding edge of the adjacent barb. Cumulative spacing isestablished by counting the total number of barbs in a 25-ft(7.6-m) length of barbed wire. Barbs are subject to relocationduring fabrication and handling, potentially leading to rejec-tions with rigid interpretation of t
44、he spacing requirement.Therefore, barb spacing shall be considered acceptable underthe following conditions:8.2.1 The sample has 93.5 % of the individual barb spacingsconforming to the specified spacing 634 in. (19 mm), and8.2.2 A sample length of 25 ft (7.6 m) of barbed wirecontains:8.2.2.1 A minim
45、um of 86 barbs for 3-in. (76-mm) spacing,8.2.2.2 A minimum of 69 barbs for 4-in. (102-mm) spacing,or8.2.2.3 A minimum of 55 barbs for 5-in. (127-mm) spacing.8.3 Barb LengthThe barb length, measured from thecenter of the two strand wires, shall be38 in. (9.5 mm)minimum (see Fig. 1). A barb is conside
46、red under length if anyof its barb points as specified in Table 1 does not meet thisminimum length.8.3.1 Within a 25-ft (7.6-m) length of sample, 95 % of thebarbs shall meet the minimum barb length.9. Sampling and Testing9.1 SamplingFor the purpose of tests, select one spool atrandom from every 50 s
47、pools or fraction thereof in a lot, or atotal of seven samples, whichever is less. A lot shall consist ofall spools of a single construction (Design Number) of barbedwire offered for delivery at the same time.9.2 Test Specimens for Physical TestsCut a 4-ft (1.2-m)length of barbed wire from the end o
48、f each spool for testsprescribed in Sections 6 and 7. Determine the breaking strengthvalue by testing the twisted strand as composite. Test eachstrand wire individually for weight of coating.A121 13 (2017)39.3 Testing for Weight of Coating Coating weight forTypes Z and ZA shall be determined in acco
49、rdance with TestMethod A90/A90M. Coating weight for Type A shall bedetermined in accordance with Test Method A428/A428M.Perform testing either before or after fabrication for the strandwires and for Type A steel barbs. Perform testing prior tofabrication for Type Z and ZAbarbs, and certify the test results.9.4 Pretesting of WireInstead of testing wire for breakingstrength and weight of coating from the completed barbed wirein accordance with 9.2, the manufacturer, at his election, shallestablish compliance
