ASTM A 123

Designation:A123/A123M–01a

StandardSpecificationfor

Zinc(Hot-DipGalvanized)CoatingsonIronandSteel

Products1

ThisstandardisissuedunderthefixeddesignationA123/A123M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.

ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope

1.1Thisspecificationcoverstherequirementsforzinc

coating(galvanizing)bythehot-dipprocessonironandsteel

productsmadefromrolledpressedandforgedshapes,castings,

plates,bars,andstrips.

1.2Thisspecificationcoversbothunfabricatedproductsand

fabricatedproducts,forexample,assembledsteelproducts,

structuralsteelfabrications,largetubesalreadybentorwelded

beforegalvanizing,andwireworkfabricatedfromuncoated

steelwire.Thisspecificationalsocoverssteelforgingsandiron

castingsincorporatedintopiecesfabricatedbeforegalvanizing

orwhicharetoolargetobecentrifuged(orotherwisehandled

toremoveexcessgalvanizingbathmetal).

NOTE1—ThisspecificationcoversthoseproductspreviouslyaddressedinSpecificationsA123-78andA386-78.

1.3Thisspecificationdoesnotapplytowire,pipe,tube,or

steelsheetwhichisgalvanizedonspecializedorcontinuous

lines,ortosteellessthan22gage(0.0299in.)(0.76mm)thick.

1.4Thegalvanizingofhardwareitemsthataretobe

centrifugedorotherwisehandledtoremoveexcesszinc(such

asboltsandsimilarthreadedfasteners,castingsandrolled,

pressedandforgeditems)shallbeinaccordancewithSpeci-

ficationA153/A153M.

1.5Thisspecificationisapplicabletoordersineither

inch-poundunits(asA123)orSIunits(asA123M).Inch-

poundunitsandSIunitsarenotnecessarilyexactequivalents.

Withinthetextofthisspecificationandwhereappropriate,SI

unitsareshowninparentheses.Eachsystemshallbeused

independentlyoftheotherwithoutcombiningvaluesinany

way.InthecaseofordersinSIunits,alltestingandinspection

shallbedoneusingthemetricequivalentofthetestor

inspectionmethodasappropriate.InthecaseofordersinSI

units,suchshallbestatedtothegalvanizerwhentheorderis

placed.2.ReferencedDocuments

2.1ASTMStandards:

A47/A47MSpecificationforFerriticMalleableIronCast-

ings2

A90/A90MTestMethodforWeight[Mass]ofCoatingon

IronandSteelArticleswithZincorZinc-AlloyCoatings3

A143PracticeforSafeguardingAgainstEmbrittlementof

Hot-DipGalvanizedStructuralSteelProductsandProce-

dureforDetectingEmbrittlement3

A153/A153MSpecificationforZincCoating(Hot-Dip)on

IronandSteelHardware3

A384PracticeforSafeguardingAgainstWarpageandDis-

tortionDuringHot-DipGalvanizingofSteelAssemblies3

A385PracticeforProvidingHigh-QualityZincCoatings

(Hot-Dip)3

A780PracticeforRepairofDamagedandUncoatedAreas

ofHot-DipGalvanizedCoatings3

A902TerminologyRelatingtoMetallicCoatedSteelProd-

ucts3

B6SpecificationforZinc4

B487TestMethodforMeasurementofMetalandOxide

CoatingThicknessesbyMicroscopicalExaminationofa

CrossSection5

B602TestMethodforAttributeSamplingofMetallicand

InorganicCoatings5

E376PracticeforMeasuringCoatingThicknessby

Magnetic-FieldorEddy-Current(Electromagnetic)Test

Methods6

3.Terminology(SeeFig.1)

3.1Definitions:

3.1.1Thefollowingtermsanddefinitionsarespecifictothis

specification.TerminologyA902containsothertermsand

definitionsrelatingtometallic-coatedsteelproducts.

3.2DefinitionsofTermsSpecifictoThisStandard:

3.2.1averagecoatingthickness,n—theaverageofthree

1ThisspecificationisunderthejurisdictionofASTMCommitteeA05onMetallicCoatedIronandSteelProductsandisthedirectresponsibilityofSubcommitteeA05.13onStructuralShapesandHardwareSpecifications.CurrenteditionapprovedOctober10,2001.PublishedDecember2001.Origi-nallypublishedasA123–28T.LastpreviouseditionA123–

01.2AnnualBookofASTMStandards,Vol01.02.3AnnualBookofASTMStandards,Vol01.06.4AnnualBookofASTMStandards,Vol02.04.5AnnualBookofASTMStandards,Vol02.05.6AnnualBookofASTMStandards,Vol03.03.

1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.COPYRIGHT 2002; ASTM International

Document provided by IHS Licensee=Fluor Corporation/2110503105, User=, 08/07/2002 23:56:10 MDT Questions or comments about this message: please callthe Document Policy Management Group at 1-800-451-1584.specimencoatingthicknesses.

3.2.2black,adj—denotestheconditionofnotgalvanizedor

otherwisecoated.Forpurposesofthisspecificationtheword“black”doesnotrefertothecolororconditionofsurface,orto

asurfacedepositorcontamination.

3.2.3coatingthicknessgrade,n—thenumericalvalue

fromFIG.1Single-andMulti-SpecimenArticles

TABLE1MinimumAverageCoatingThicknessGradebyMaterialCategory

MaterialCategoryAllSpecimensTestedSteelThicknessRange(Measured),in.(mm)

<1⁄16(<1.6)1⁄16to<1⁄8(1.6to<3.2)1⁄8to3⁄16(3.2to4.8)>3⁄16to<1⁄4(>4.8to<6.4)$1⁄4($6.4)

StructuralShapesandPlate45657585100StripandBar45657585100PipeandTubing4545757575Wire35506065

80