This intermational standard was developed in accordance with internationally recognized principles on standardization established inthe Decisionon Principles forthe Development of International Standards, Guides and Recommendations issued by the Worid Trade Organization Technical Barriers to Trade (TBT) Committee. Designation:A123/A123M-24 Standard Specification for Zinc(Hot-Dip Galvanized)CoatingsonIronand Steel Products1 This standard is ssued under the fixed designation A123/A123M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,the year of last revision,Anumber in parentheses indicates the yearoflast reapproval. Asuperscript epsilon (e)indicates an editorial change since the last revisionorreapproval. This standard has been approved for use by agencies of the U.S.Department of Defense. 1. Scope* units are shown in parentheses. Each system shall be used 1.1 This specification covers the requirements for zinc independently of the other without combining values in any coating (galvanizing)bythe hot-dip process on iron and steel way.In the case oforders in SI units,alltesting and inspection shall be done using the metric equivalent of the test or productsmadefrom rolledpressed andforged shapes,castings, plates,bars, and strips. inspectionmethodas appropriate.Inthecase of orders in Si units, such shall be stated to the galvanizer when the order is 1.2This specification coversboth unfabricated products and placed. fabricated products, for example,assembled steel products, 1.7 This international standard was developed in accor- structural steelfabrications,large tubes alreadybentor welded dance with internationally recognized principles on standard- beforegalvanizing,andwireworkfabricatedfromuncoated steel wire.This specification also covers steel forgings and iron ization established in the Decision on Principles for the castings incorporated into piecesfabricated before galvanizing Development of International Standards, Guides and Recom- or which are too large to be centrifuged (or otherwise handled mendations issued by the World Trade Organization Technical to remove excess galvanizing bath metal). BarrierstoTrade(TBT)Committee. Nore1-Thisspecification covers those products previously addressed 2.Referenced Documents inSpecificationsA123-78andA386-78. 2.1.ASTM Standards:2 1.3This specificationdoesnotapplytowire,pipe,tube,or A47/A47MSpecification for Ferritic Malleable IronCast- steel sheet which is galvanized on specialized or continuous ings lines,or to steel less than 22gauge(0.0299 in.)[0.76 mm] A90/A90M Test Method for Weight [Mass] of Coating on thick. Iron and Steel Articles with Zinc or Zinc-Alloy Coatings 1.4 The galvanizing of hardware items that are to be A143/A143MPractice for Safeguarding Against Embrittle- centrifuged or otherwise handled to remove excess zinc (such ment of Hot-Dip Galvanized Structural Steel Products and as bolts and similar threaded fasteners,castings and rolled, Procedure for DetectingEmbrittlement pressed and forged items) shall be in accordance with Speci- A1094/A1094M Specification for Continuous Hot-DipGal- ficationA153/A153M. vanized Steel Bars for Concrete Reinforcement 1.5 Fabricated reinforcing steel bar assemblies are covered A153/A153MSpecificationforZincCoating(Hot-Dip)on Iron and Steel Hardware by the present specification.The batch galvanizing of separate A384/A384MPractice for SafeguardingAgainst Warpage reinforcing steel bars shall be in accordance with Specification A767/A767Mand the continuous galvanizingof reinforcing and Distortion During Hot-Dip Galvanizing of Steel Assemblies bars shall be in accordance with Specification A1094/A1094M. A385/A385MPractice for Providing High-Quality Zinc 1.6 This specification is applicable to orders in either Coatings (Hot-Dip) inch-poundunits(asA123)orSIunits(asA123M).Inch- A767/A767MSpecification for Zinc-Coated (Galvanized) pound units and SI units are not necessarily ex