1、Designation: A121 13Standard 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 revision. A number in
2、 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 Department of Defense.1. Scope1.1 This specification covers metallic-coated steel barbedwire, con
3、sisting 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 values
4、 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) shall not be consid-ered
5、as requirements of the specification.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 Iron or Steel ArticlesA641/A641M Specification
6、 for ZincCoated (Galvanized)Carbon Steel WireA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentA809 Specification for Aluminum-Coated (Aluminized)Carbon Steel WireA856/A856M Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon Steel WireA902 Ter
7、minology 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 Storage33. Terminology3.1 DefinitionsFor d
8、efinitions 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 constructions, as listed in Table 1.4.3 Metallic Coa
9、ting 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-5AL-MM) coated strand wire. See Table3.
10、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)centers with Coating Type A, Z, or ZA o
11、nly.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 wire gage of the barbs, and a letter indicating the shape ofthe ba
12、rbs.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 April 1, 2013. Published May 2013. Originallyapproved in 1928. Last previous editio
13、n approved in 2007 as A121 - 07. DOI:10.1520/A0121-13.2For 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.3Availa
14、ble 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 States15. Ordering Information5.1 Orders for material under this specifica
15、tion 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 of spools),5.1.3 Metallic coating type (see 4.3),5.1.4 Me
16、tallic 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 the manufacturers option,5.1.7 ASTM designation and year
17、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 Specification A121-latest edition, withcertification.5.2 All spools
18、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 of good commercial quality carbonsteel, capable
19、of meeting the breaking strength requirement in7.7. The base metal for aluminum barbs (permitted withTABLE 1 Standard Sizes and Constructions for Barbed WireDesign Number Size, Steel Wire GageNominal Diameter of CoatedWire, in. (mm)Number of BarbPointsSpacing of Barbs,in. (mm)Diameter of Barbs, Stee
20、lWire 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 (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
21、 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 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 R
22、ound13-4-5-14R 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) 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
23、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 1512 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 0.0
24、99 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, is High-Security Grade. All other design numbers are for standard grade.CThe gage of the half-round and flat barbs is design
25、ated 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 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
26、 (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)A0.60 (200)AThese sizes only furnished with Class 3 Coating (Section 8).TABLE 3 Minimum Weight of Coating on Type ZA Barbed W
27、ireSize,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) 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
28、) 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 132metallic Coating Type A) shall be aluminum alloy wireconforming to Alloy 5000-H38, Alloy 6061-T94, or equal.6.1.1 For Coating TypeAbarbed
29、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 be agreed upon between the manufacturerand the purchaser at the time the
30、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 Type Z Zinc-coated wire in accordance withSpecification A641/A641M.6.2.3 Co
31、ating 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 Strand WiresThe strand wires for Types Z and ZA barbed wire, asrepresented by
32、 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,shall have a minimum coating weight of 0.30 oz/ft2(90 g/m2)on the 1212 gage
33、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 barbs forType A barbed wire, as represented by the test specimens, shal
34、lhave 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 1 for the Design Number specified in theorder, within the tolerances st
35、ated 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 wire shall have the twistingconsistently in one direction (left or right) o
36、r 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 means of a wrap joint oran electric butt weld is permitted. Not more than t
37、hree 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 A80 rods (1320 ft) (402 m) or 1000 ft (305 m).7.6 Types Z and ZA 80 rod
38、s (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 strength reflects that of both strandwires tested together as one unit.8. Pe
39、rmissible 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 when formingthe barbs, a certain amount of out-of-roundness is expected.Th
40、e 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 the strand to thecorresponding edge of the adjacent barb. Cumulative sp
41、acing 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 the spacing requirement.Therefore, barb spacing shall be considered accep
42、table 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 minimum of 86 barbs for 3-in. (76-mm) spacing,8.2.2.2 A minimum of 69 barbs f
43、or 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 considered under length if anyFIG. 1 Example of a Complete BarbA121 133of its b
44、arb 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 spools or fraction thereof in a
45、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 of each spool for testsprescribe
46、d 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 Coating Coating weight forTypes Z and ZA shall be determined in accordance with TestMethod A90/A90M. Coating weigh
47、t 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 testi
48、ng 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 election, the purch
49、aser 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 Inspection for General Workmanship For 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 o
