ASTM_A_121_-_19.pdf

Designation:A12119Standard 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 U.S.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 constructions(designs),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 standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.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.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 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 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-Mischmetal Alloy-Coated Carbon Steel WireA902 Terminology Relating to Metallic Coated Steel Prod-ucts2.2 Federal Standard:3Fed.Std.No.123 Marking for Shipments(Civil Agencies)2.3 Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products Preparation for Shipmentand Storage3.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 NumberNumbers describing standard sizesand constructions,as listed in Table 1.4.3 Metallic Coating Type:4.3.1 Coating Type AMade from aluminum-coated strandwire.See 6.3.(Only one coating weight for each wire size.)4.3.2 Coating Type ZMade from zinc-coated strand wire.See Table 2.4.3.3 Coating Type ZAMade 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 Grades:4.5.1 Standard GradeBarbs spaced on 4 or 5 in.(102 or127 mm)centers as indicated in Table 1.1This 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 May 1,2019.Published May 2019.Originallyapproved in 1928.Last previous edition approved in 2017 as A121 13(2017).DOI:10.1520/A0121-19.2For 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.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard 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.1 4.5.2 High-Security GradeBarbs spaced on 3 in.(76 mm)centers with Coating Type A,Z,or ZA only.NOTE1The design numbers are related to the characteristics of theconstruction of the barbed wire,with the number groups related,in order,to the steel wire gauge of the strand wires,number of barb points,spacingof barbs,steel wire gauge of the barbs,and a letter indicating the shape ofthe barbs.5.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 le