美国材料协会标准 A121 - 19.pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Designation: A121 − 19 Standard Specification for Metallic-Coated Carbon Steel Barbed Wire1 This standard is issued under the fixed designation A121; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript 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. Scope A700 Guide for Packaging, Marking, and Loading Methods 1.1 This specification covers metallic-coated steel barbed for Steel Products for Shipment wire, consisting of a strand of two wires. A809 Specification for Aluminum-Coated (Aluminized) Carbon Steel Wire 1.2 The barbed wire is available with aluminum, zinc, and A856/A856M Specification for Zinc-5 % Aluminum- zinc-5 % aluminum-mischmetal alloy coatings, with a number Mischmetal Alloy-Coated Carbon Steel Wire of coating weights, in a number of different constructions A902 Terminology Relating to Metallic Coated Steel Prod- (designs), and in two