ASTM_F_2674_-_07.pdf

Designation:F 2674 07Standard Specification forZinc Coating,Hot-Dip,Requirements for Application toCarbon and Alloy Steel Bolts,Screws,Washers,Nuts,andSpecial Threaded Fasteners Metric1This standard is issued under the fixed designation F 2674;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements for hot-dipzinc coating applied to carbon steel and alloy steel bolts,screws,washers,nuts,and special threaded fasteners appliedby the hot-dip coating process that are manufactured in SI units(metric).Nails and rivets are not included in this specification.NOTE1This specification is the metric companion of SpecificationF 2329.1.2 This specification is intended to be applicable to fasten-ers that are centrifuged or otherwise handled to remove excessgalvanizing bath metal(free zinc).1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A 153/A 153M Specification for Zinc Coating(Hot-Dip)onIron and Steel HardwareA 563M Specification for Carbon and Alloy Steel NutsMetricB 487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination of CrossSectionE 376 Practice for Measuring Coating Thickness byMagnetic-Field or Eddy-Current(Electromagnetic)Exami-nation MethodsF 606M Test Methods for Determining the MechanicalProperties of Externally and Internally Threaded Fasteners,Washers,and Rivets MetricF 1470 Guide for Fastener Sampling for Specified Mechani-cal Properties and Performance InspectionF 1789 Terminology for F16 Mechanical FastenersF 2329 Specification for Zinc Coating,Hot-Dip,Require-ments for Application to Carbon and Alloy Steel Bolts,Screws,Washers,Nuts,and Special Threaded Fasteners3.Terminology3.1 Terms used in this specification are defined in Termi-nology F 1789 unless otherwise defined in this specification.3.2 Definitions of Terms Specific to This Standard:3.3 batch lotquantity of identical parts cleaned,pickled,fluxed,and galvanized together at one time in a galvanizingbasket.3.4 galvanizinghot-dip zinc coating.3.5 high temperature galvanizinggalvanizing process car-ried out in a ceramic vessel(kettle)at an approximatetemperature ranging between 530 and 560 C.3.6 hot-dip zinc coating of mechanical fastenersprocesswhereby fasteners are zinc coated by immersion in a bath ofmolten zinc,resulting in the formation of the iron/zinc alloycoating and a zinc coating at the surface of the fastener.Thisprocess involves the removal of excess zinc by spinning theparts in a centrifuge,or brushing the threaded portion,orhandling otherwise to remove the excess zinc.3.7 production lotbatches of parts originating from thesame manufacturing lot,processed continuously through clean-ing,pickling,fluxing,dipping in molten zinc and spun in acentrifuge,or other means,without any significant change intime,temperature,and concentration of the constituents of theprocess.3.8 stress reliefprocess of heating parts for a definite timeat a given temperature in order to relieve stress induced bywork hardening.4.Ordering Information4.1 Orders for zinc coating of fasteners to this specificationshall include the following:1This test method is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.03 on Coatings onFasteners.Current edition approved Dec.1,2007.Published January 2008.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.1.1Name of product(that is,bolt,stud,nut,washers,orother);4.1.2 ASTM designation and year of issue,including fas-tener specification number;4.1.3 Hydrogen embrittlement relief,as required by thepurchaser,see 7.2.3;4.1.4 Quantity of fasteners to be hot-dip zinc coated;4.1.5 Stress relief or tempering temperature to which thefasteners were subjected,if applicable;4.1.6Secondary processing such as chromating,phosphat-ing,or lubrication,if applicable;4.1.7 Average galvanizing temperature to which fastenerswill be subjected,if required by the purchaser(see 7.2.2);4.1.8 Specify baking if required(see 7.2.3);and4.1.9Certification,if required(see 14.1).5.Materials and Ma