欢迎来到标准图书馆! | 帮助中心 Day Day UP!
标准图书馆
首页 标准图书馆 > 资源分类 > PDF文档下载

ASTM A121 - 13.pdf

  • 资源大小:119.08KB        全文页数:5页
  • 资源格式: PDF        下载权限:游客/注册会员/VIP会员    下载费用:20Gold 【人民币20元】
游客快捷下载 游客一键下载
会员登录下载
下载资源需要20Gold 【人民币20元】Paypal charge shall be login

邮箱/手机号:
您支付成功后,系统会自动为您创建此邮箱/手机号的账号,密码跟您输入的邮箱/手机号一致,以方便您下次登录下载和查看订单。注:支付完成后需要自己下载文件,并不会自动发送文件哦!

支付方式: 微信支付    支付宝   
验证码:   换一换

友情提示
2、本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

ASTM A121 - 13.pdf

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 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, 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 constructionsdesigns, and in two grades. Not all designs are available in allcoating 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 shall not be consid-ered as requirements of the specification.2. Referenced Documents2.1 ASTM Standards2A90/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 for Zinc–Coated GalvanizedCarbon Steel WireA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentA809 Specification for Aluminum-Coated AluminizedCarbon Steel WireA856/A856M Specification for Zinc-5 Aluminum-Mischmetal Alloy-Coated Carbon Steel WireA902 Terminology Relating to Metallic Coated Steel Prod-ucts2.2 Federal StandardFed. Std. No. 123 Marking for Shipments Civil Agencies32.3 Military StandardsMIL-STD-129 Marking for Shipment and Storage3MIL-STD-163 Steel Mill Products Preparation for Shipmentand Storage33. 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 constructions, as listed in Table 1.4.3 Metallic Coating Type4.3.1 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 Table3.4.4 Metallic Coating ClassThe specified amount of coat-ing coating weight mass on the strand wire.4.5 Grades4.5.1 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-mmcenters with Coating Type A, Z, or ZA 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 wire 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 April 1, 2013. Published May 2013. Originallyapproved in 1928. Last previous edition approved in 2007 as A121 - 07. DOI10.1520/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 standard’s 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 States15. 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 standard 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 shall be at the manufacturer’s 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 Specification 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.6. Material6.1 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 withTABLE 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 121⁄2 0.099 2.51 4 3 76 14 Round12-4-5-14R 121⁄2 0.099 2.51 4 5 127 14 Round12-4-3-12RB121⁄2 0.099 2.51 4 3 76 12 RoundMetallic Coating Type Z and Type ZA12-2-4-12F 121⁄2 0.099 2.51 2 4 102 121⁄2CFlat12-2-4-13F 121⁄2 0.099 2.51 2 4 102 13CFlat12-2-4-14R 121⁄2 0.099 2.51 2 4 102 14 Round12-2-5-12F 121⁄2 0.099 2.51 2 5 127 121⁄2CFlat12-2-5-14R 121⁄2 0.099 2.51 2 5 127 14 Round12-4-5-14H 121⁄2 0.099 2.51 4 5 127 14CHalf-round12-4-5-14R 121⁄2 0.099 2.51 4 5 127 14 Round13-2-4-14R 131⁄2 0.086 2.18 2 4 102 14 Round13-4-5-14R 131⁄2 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 5 127 14 Round15-2-5-13F 151⁄2 0.067 1.70 2 5 127 133⁄4CFlat15-2-5-14R 151⁄2 0.067 1.70 2 5 127 14 Round15-4-5-16R 151⁄2 0.067 1.70 4 5 127 161⁄2 Round15-4-3-16R 151⁄2 0.067 1.70 4 3 76 161⁄2 RoundAThe nominal diameter of the wire used in making the barbs shall be as follows121⁄2 gage 0.099 in. 2.51 mm13 gage 0.092 in. 2.34 mm133⁄4 gage 0.083 in. 2.11 mm14 gage 0.080 in. 2.03 mm161⁄2 gage 0.058 in. 1.47 mmBDesign Number 12–4–3–12R, 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 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/ft2g/m2in. mm Class 1 Class 3121⁄2 0.099 2.51 0.28 85 0.80 24513 0.092 2.34 0.28 85 0.75 230131⁄2 0.086 2.18 0.25 75 0.70 215133⁄4 0.083 2.11A0.70 21514 0.080 2.03 0.25 75 0.70 215151⁄2 0.067 1.70A0.65 200161⁄2 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,SteelWireGageNominal Diameter ofType ZAMinimum Weight of Coating ofUncoated Wire Surface, oz/ft2g/m2Classin. mm Class 1 Class 3 Class 60121⁄2 0.099 2.51 0.28 85 0.802450.6018313 0.092 2.34 0.28 85 0.752300.60183131⁄2 0.086 2.18 0.25 75 0.702150.60183133⁄4 0.083 2.11 0.25 75 0.702150.6018314 0.080 2.03 0.25 75 0.702150.60183151⁄2 0.067 1.70 0.20 61 0.65198n/a161⁄2 0.058 1.47 0.20 61 0.60183n/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 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 order is placed.6.2 Coating MaterialsThe coating on the wire shall con-form with the requirements of the following specifications6.2.1 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 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 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 specimens,shall have a minimum coating weight of 0.30 oz/ft290 g/m2on the 121⁄2 –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 barbs forType A barbed wire, as represented by the test specimens, shallhave a minimum coating weight of 0.25 oz/ft275 g/m2onthe14–gage 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 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 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 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 pack-aged on spools in lengths as follows7.5.1 Type 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 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 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 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 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-tions with rigid interpretation of the spacing requirement.Therefore, barb spacing shall be considered acceptable underthe following conditions8.2.1 The sample has 93.5 of the individual barb spacingsconforming to the specified spacing 63⁄4 in. 19 mm, and8.2.2 A sample length of 25 ft 7.6 m of barbed wirecontains8.2.2.1 A minimum 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 be3⁄8 in. 9.5 mmminimum see Fig. 1. A barb is considered under length if anyFIG. 1 Example of a Complete BarbA121 − 133of 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 spools 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-mlength of barbed wire from the end of 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.9.3 Testing for Weight of Coating Coating weight forTypes Z and ZA shall be determined in accordance 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 with the requirements in Sections 6 and 7by tests made on wire prior to fabrication. If the manufacturermakes this election, 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 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.

注意事项

本文(ASTM A121 - 13.pdf)为本站会员(admin)主动上传,标准图书馆仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知标准图书馆(发送邮件至[email protected]或直接QQ联系客服),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

@copyright 2017-Stdlibrary All Rights Reserved.


收起
展开