1、Designation: A 121 07Standard Specification forMetallic-Coated Carbon Steel Barbed Wire1This standard is issued under the fixed designation A 121; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. Asuperscript 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. Scope1.1 This specification covers metallic-coated steel barbedwire,
3、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 allcoating types.1.3 The val
4、ues stated in inch-pound units are to be regardedas the standard. The values given in brackets are for informa-tion only.1.4 The text of this specification references notes andfootnotes that provide explanatory information. These notesand footnotes (excluding those in tables) shall not be consid-ere
5、d as requirements of the specification.2. Referenced Documents2.1 ASTM Standards:2A 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA 428/A 428M Test Method for Weight Mass of Coatingon Aluminum-Coated Iron or Steel ArticlesA 641/A 641M Speci
6、fication for ZincCoated (Galvanized)Carbon Steel WireA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for ShipmentA 809 Specification for Aluminum-Coated (Aluminized)Carbon Steel WireA 856/A 856M Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon Steel Wi
7、reA 902 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 Ship-ment and Storage33. Terminology3.1 Def
8、initionsFor definitions of terms used in this speci-fication, refer to Terminology A 902.4. Classification4.1 The barbed wire covered by this specification is classi-fied as described in this section.4.2 Design NumberNumbers describing standard sizesand constructions, as listed in Table 1.4.3 Metall
9、ic Coating Type:4.3.1 Coating Type AMade from aluminum-coated strandwire.4.3.2 Coating Type ZMade from zinc-coated strand wire.4.3.3 Coating Type ZAMade from zinc-5 % aluminum-mischmetal alloy (Zn-5AL-MM) coated strand wire.4.4 Metallic Coating ClassThe specified amount of coat-ing (coating weight m
10、ass) on the strand wire.4.4.1 For Coating TypeA, see 6.3. (Only one coating weightfor each wire size.)4.4.2 For Coating Type Z, see Table 2.4.4.3 For Coating Type AZ, see Table 3.4.5 Grades:4.5.1 Standard GradeBarbs spaced on 4 or 5-in. 102 or127-mm centers as indicated in Table 1.4.5.2 High-Securit
11、y GradeBarbs spaced on 3-in. 76-mmcenters (for Coating Type A only).NOTE 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 wi
12、re gage of the barbs, and a letter indicating the shape ofthe barbs.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, 2007. Publ
13、ished September 2007. Originallyapproved in 1928. Last previous edition approved in 2004 as A 121 - 99(2004).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 sta
14、ndards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-50981Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Ordering
15、 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 standard size o
16、f 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 shall be at t
17、he manufacturers option,5.1.7 ASTM designation and year of issue, and5.1.8 Certification or test report, or both, if required.NOTE 2A typical ordering description is as follows: Steel barbedwire, 20 spools of 80 rods each, Coating Type Z, Coating Class 3, DesignNumber 12-2-4-14R, to ASTM Specificati
18、on A 121-99, with certification.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.6. Material6.1 Base MetalThe base metal of the steel strand wiresand steel barbs shall be o
19、f 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 Alloy 5000-H38, Alloy 6061-T94, or equal.6.1.1 For CoatingTypeAbarbed wire, the choic
20、e 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 be agreed upon between the manufacturerand the purchaser at the time the order is placed
21、.TABLE 1 Standard Sizes and Constructions for Barbed WireDesign Number Size, Steel Wire GageNominal Diameter of CoatedWire, in. mmNumber of BarbPointsSpacing of Barbs,in. mmDiameter 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 121
22、2 0.099 2.51 4 5 127 14 Round12-4-3-12RB1212 0.099 2.51 4 3 76 14 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
23、 2.51 2 5 127 14 Round12-4-5-14H 1212 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 Round14-2-5-14F 14 0.080 2.03 2 5 127 14 Flat14-4-5-14F 14 0.080 2.03 4 5 127 14 Flat14-2-5-14R 14 0.080 2
24、.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 RoundAThe nominal diameter of the wire used in making the barbs shall be as follows:1212 gage 0.099 in. 2.51 mm1
25、3 gage 0.092 in. 2.32 mm1334 gage 0.083 in. 2.11 mm14 gage 0.080 in. 2.03 mm1612 gage 0.058 in. 1.47 mmBDesign Number 124312R, Metallic Coated Type A, 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 r
26、ound wire from which the barbs are rolled.TABLE 2 Minimum Weight of Coating on Type Z Barbed WireSize, SteelWire GageNominal Diameter ofType ZMinimum Weight of Coating of UncoatedWire Surface, oz/ft2g/m2in. mm Class 1 Class 31212 0.099 2.51 0.28 85 0.80 24513 0.092 2.32 0.28 85 0.75 2301312 0.086 2.
27、18 0.25 75 0.70 2151334 0.083 2.11A0.70 21514 0.080 2.03 0.25 75 0.70 2151512 0.067 1.70A0.65 2001612 0.058 1.47A0.60 200AThese sizes only furnished with Class 3 Coating (Section 8).TABLE 3 Minimum Weight of Coating on Type ZA Barbed WireSize WireGageNominal Diameterof Type ZA WireMinimum Weight of
28、Coating of UncoatedWire Surface, oz/ft2g/m2ClassAin. mm 20 40 60 80 100 1201212 0.099 2.51 XBXXXXX13 0.092 2.32 X X X X X X1312 0.086 2.18 X X X X X X1334 0.083 2.11 X X X X X X14 0.080 2.03 X X X X X X1512 0.067 1.70 X X X X X X1612 0.058 1.47 X X X X X XACoating Class 20 40 60 80 100 120Coating We
29、ightoz/ft20.20 0.40 0.60 0.80 1.00 1.20(g/m)261 122 183 244 305 366BX denotes availability.A1210726.2 Coating MaterialsThe coating on the wire shall con-form with the requirements of the following specifications:6.2.1 Coating Type AAluminum-coated wire in accor-dance with Specification A 809.6.2.2 C
30、oating Type ZZinc-coated wire in accordance withSpecification A 641/A 641M.6.2.3 Coating Type ZAZinc-5 % aluminum-mischmetalalloy (Zn-5Al-MM) coated wire in accordance with Specifica-tion A 856/A 856M.6.3 Coated WireThe steel wire shall be coated beforefabrication.6.3.1 Weight of Coating Requirement
31、s for Strand 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 spe
32、cimens,shall have a minimum coating weight of 0.30 oz/ft290 g/m2on 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
33、 wire for barbs forTypeAbarbed wire, as represented by the test specimens, shallhave a minimum coating weight of 0.25 oz/ft275 g/m2 on the14gage wire.7. General Requirements7.1 The sizes and constructions for barbed wire furnishedunder this specification shall be in accordance with therequirements o
34、f Table 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 length, measured from the center of the twostrand wires, shall be38 in. 9.5 mm minimum.7.3 The strand wires shall be twisted with a
35、 uniform lengthof lay. Type Z and Type ZAbarbed wire 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
36、 prohibited.7.4 Splicing of individual wires by means 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 p
37、ack-aged on spools in lengths as follows:7.5.1 Type A80 rods (1320 ft) 402 m or 1000 ft 305 m.7.6 Types Z and ZA80 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 les
38、s than 950lbf 4230 N. This breaking strength 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 mm8.1.1
39、Due to the mechanics of manufacture when 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 SpacingThe nominal spacing of the barbs shallbe as noted in Table 1. The individual barb spacing shall be
40、measured from the edge of one barb at the strand to thecorresponding edge of the adjacent barb. Cumulative spacing isestablished by counting the total number of barbs in a 25-ft7.6-m length of barbed wire. Barbs are subject to relocationduring fabrication and handling, potentially leading to rejec-t
41、ions with rigid interpretation of the 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 barb
42、ed wirecontains:8.2.2.1 A minimum of 86 barbs for 3-in. 76-mm spacing,8.2.2.2 Aminimum of 69 barbs for 4-in. 102-mm spacing,or8.2.2.3 Aminimum of 55 barbs for 5-in. 127-mm spacing.9. Sampling and Testing9.1 SamplingFor the purpose of tests, select one spool atrandom from every 50 spools or fraction
43、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-mlength of barbed wire from the end of each spool for tes
44、tsprescribed in Sections 6 and 7. Determine the breaking strengthvalue by testing the twisted strand as composite. Test eachstrand wire individually for weight of coating.9.3 Testing for Weight of CoatingCoating weight forTypes Z and ZA shall be determined in accordance with TestMethod A 90/A 90M. C
45、oating weight for Type A shall bedetermined in accordance with Test Method A 428/A 428M.Perform testing either before or after fabrication for the strandwires and for Type A steel barbs. Perform testing prior tofabrication forType Z and ZAbarbs, and certify the test results.9.4 Pretesting of WireIns
46、tead 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 with the requirements in Sections 6 and 7by tests made on wire prior to fabrication. If the manufacturermakes this electi
47、on, the purchaser still has the right to test wirefrom the completed barbed wire for compliance. It is recog-nized that during fabrication the barb is mechanically deformedand scraped, and some differences are likely in coating weightresults on barbs tested before and after fabrication.9.5 Inspectio
48、n for General WorkmanshipFor the purposeof inspection, a maximum of two spools from the lot, asdescribed in 9.1, shall be subjected to observations for barblength and spacing, overall length, and workmanship.9.5.1 Instead of inspecting for length by unrolling fullspools, the purchaser and manufactur
49、er have the option ofagreeing on a weight per spool related to wire size orA121073measuring tools employed during manufacturing. The pur-chaser still reserves the right to confirm the length by actualmeasurement.9.5.2 Inspection for barb spacing is normally performed onthe outer 25-ft 7.6-m length of a spool, which permitsrepacki
