ASTM_F_2660_-_13.pdf

Designation:F266013Standard Test Method forQualifying Coatings for Use on A490 Structural BoltsRelative to Environmental Hydrogen Embrittlement1This standard is issued under the fixed designation F2660;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method defines the procedures and tests toevaluate the effect of a coating system on the susceptibility toenvironmental hydrogen embrittlement(EHE)of an ASTMA490 high strength structural bolt.1.2 This test method shall qualify a coating system for usewith any size of A490 bolts(that is,12to 1-12in.)high strengthstructural bolts,relative to EHE.1.3 The characteristic to be evaluated by this test method isthe susceptibility to EHE caused by hydrogen generated fromcorrosion protection of the steel bolt by sacrificial galvaniccorrosion of the coating.Testing shall be performed on coated,specimen ASTM A490 bolts manufactured to the maximumsusceptible tensile strength values(see Table 1)of the bolt(seeSection 5 Specimen Bolt Requirements).The internal hydro-gen embrittlement(IHE)susceptibility will also be inherentlyevaluated when the EHE is tested through this test method.There is no need for a separate IHE susceptibility test.1.4 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard.1.5 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:2A490 Specification for Structural Bolts,Alloy Steel,HeatTreated,150 ksi Minimum Tensile StrengthE4 Practices for Force Verification of Testing MachinesE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsF519 Test Method for Mechanical Hydrogen EmbrittlementEvaluation of Plating/Coating Processes and Service En-vironmentsF606 Test Methods for Determining the Mechanical Proper-ties of Externally and Internally Threaded Fasteners,Washers,Direct Tension Indicators,and RivetsF1624 Test Method for Measurement of Hydrogen Em-brittlement Threshold in Steel by the Incremental StepLoading TechniqueF1789 Terminology for F16 Mechanical FastenersF2078 Terminology Relating to Hydrogen EmbrittlementTestingG3 Practice for Conventions Applicable to ElectrochemicalMeasurements in Corrosion TestingG15 Terminology Relating to Corrosion and Corrosion Test-ing(Withdrawn 2010)3G44 Practice for Exposure of Metals andAlloys byAlternateImmersion in Neutral 3.5%Sodium Chloride SolutionG82 Guide for Development and Use of a Galvanic Seriesfor Predicting Galvanic Corrosion Performance2.2 Research Council on Structural Connections:Specification for Structural Joints Using High Strength Bolts(LRFD)Load and Resistance Factor DesignSpecification for Structural Joints Using High Strength Bolts(ASD)Allowable Stress Design2.3 Other References:Townsend Jr.,H.E.,Met Trans,V6A,April,1976Raymond,L.,The Susceptibility of Fasteners to HydrogenEmbrittlement and Stress Corrosion Cracking:FastenerSystem Design.In J.H.Bickford,&S.Nassar,Handbookof Bolts and Bolted Joints,New York,USA:MarcelDekker,Inc.,1998,pp.723-7562.4 International Standards Organization(ISO):ISO 17025 General Requirements for the Competence ofTesting and Calibration Laboratories3.Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.01 on Test Methods.Current edition approved Nov.1,2013.Published December 2013.Originallyapproved in 2012 as F266012.DOI:10.1520/F266013.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 Terminology for this test method shall be used inaccordance with Terminology F1789,Terminology F2078,andTerminology G15 except as described below.3.2 Definitions of Terms Specific to This Standard:3.2.1 specimen lot,nat least 100 ASTM A490 specimenbolts manufactured in the same process from the same lot of asteel alloy.3.2.2 specimen bolt,nis a bolt with dimensions thatconform to the requirements of A490 bolt dimensions but hasmechanical properties,which exceed those of A490 require-ments(see 5.1.1 and Table 1).4.Significance and Use4.1 This test method describes the testing procedure thatshall be used to qualify