Designation:A1072/A1072M−11(Reapproved2015)StandardSpecificationforZinc-5%Aluminum(Hot-Dip)CoatingsonIronandSteelProducts1ThisstandardisissuedunderthefixeddesignationA1072/A1072M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstherequirementsforzinc-5%aluminumcoated,bythehot-dipprocessonironandsteelproducts.Thecoatingmayalsocontainsmallamountsofelementsotherthanzincandaluminumthatareintendedtoimproveprocessingandthecharacteristicsofthecoatedproduct.Thesemetalliccoatingsincludezinc-5%-aluminum(Zn-5Al),zinc-5%-aluminum-mischmetal(Zn-5Al-MM)andzinc-5%-aluminum-magnesium(Zn-%Al-Mg).1.2Thisspecificationcoversbothun-fabricatedproductsandfabricatedproducts,forexample,assembledsteelproducts,structuralsteelfabrications,largetubesalreadybentorweldedbeforehot-dipcoating,andwireworkfabricatedfromun-coatedsteelwire.Thisspecification,also,coverssteelforgingsandironcastingsincorporatedintopiecesfabricated,beforehot-dipcoatingorwhicharetoolargetobecentrifuged(orotherwisehandledtoremoveexcessmoltenbathmetal).1.3Fabricatedreinforcingsteelbarassembliesarecoveredbythepresentspecification.1.4Thisspecificationisapplicabletoordersineitherinch-poundunits(asA1072)orSIunits(asA1072M).Inch-poundunitsandSIunitsarenotnecessarilyexactequivalents.Withinthetextofthisspecificationandwhereappropriate,SIunitsareshowninparentheses.Eachsystemshallbeusedindependentlyoftheotherwithoutcombiningvaluesinanyway.InthecaseofordersinSIunits,alltestingandinspectionshallbedoneusingthemetricequivalentofthetestorinspectionmethodasappropriate.InthecaseofordersinSIunits,suchshallbestatedtothehot-dipcoaterwhentheorderisplaced.2.ReferencedDocuments2.1ASTMStandards:2A47/A47MSpecificationforFerriticMalleableIronCast-ingsA90/A90MTestMethodforWeight[Mass]ofCoatingonIronandSteelArti...
