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:A123/A123M-24 INTERNATIONAI Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products1 This standard is issued under the fixed designation A123/A123M; 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 (s) 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* unitsareshowninparentheses.Eachsystemshallbeused 1.1 This specification covers the requirements for zinc independently of theotherwithout combiningvaluesin any coating (galvanizing) by the hot-dip process on iron and steel way.In the case of orders in SI units,all testing and inspection products made from rolled pressed and forged shapes, castings, shall be done using the metric equivalent of the test or plates, bars, and strips. inspection method as appropriate. In the case of orders in SI units,such shall be stated to thegalvanizer whenthe orderis 1.2 This specification covers both unfabricated products and placed. fabricated products, for example, assembled steel products, 1.7 This international standard was developed in accor- structural steel fabrications, large tubes already bent or welded dance with internationally recognized principles on standard- before galvanizing, and wire work fabricated from uncoated ization established in the Decision on Principles for the steel wire.This specification also covers steel forgings and iron castings incorporated into pieces fabricated before galvanizing DevelopmentofInternational Standards,Guides and Recom- mendations issued by the World Trade Organization Technical or which are too large to be centrifuged (or otherwise handled Barriers to Trade (TBT) Committee. to remove excess galvanizing bath metal). NorE 1This specification covers those products previously addressed 2. Referenced Documents in Specifications A123-78 and A38678. 2.1 ASTM Standards:2 1.3 This specification does not apply to wire, pipe, tube, or A47/A47M Specification for Ferritic Malleable Iron Cast- steel sheet which is galvanized on specialized or continuous ings lines, or to steel less than 22 gauge (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/A143M Practice 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 Detecting Embrittlement pressed and forged items) shall be in accordance with Speci- A1094/A1094M Specification for Continuous Hot-Dip Gal- ficationA153/A153M. vanized Steel Bars for Concrete Reinforcement 1.5 Fabricated reinforcing steel bar assemblies are covered A153/A153M Specification for Zinc Coating (Hot-Dip) on by the present specification. The batch galvanizing of separate Iron and Steel Hardware A384/A384M Practice for Safeguarding Against Warpage reinforcing steel bars shall be in accordance with Specification A767/A767M and the continuous galvanizing of reinforcing and Distortion During Hot-Dip Galvanizing of Steel bars shall be in accordance with Specification A1094/A1094M. Assemblies A385/A385M Practice for Providing High-Quality Zinc 1.6 This specification is applicable to orders in either Coatings (Hot-Dip) inch-pound units (as A123) or SI units (as A123M). Inch- A767/A7