ASTM_F_519_-_13.pdf

Designation:F51913Standard Test Method forMechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments1This standard is issued under the fixed designation F519;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()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.Scope1.1 This test method describes mechanical test methods anddefines acceptance criteria for coating and plating processesthat can cause hydrogen embrittlement in steels.Subsequentexposure to chemicals encountered in service environments,such as fluids,cleaning treatments or maintenance chemicalsthat come in contact with the plated/coated or bare surface ofthe steel,can also be evaluated.1.2 This test method is not intended to measure the relativesusceptibility of different steels.The relative susceptibility ofdifferent materials to hydrogen embrittlement may be deter-mined in accordance with Test Method F1459 and Test MethodF1624.1.3 This test method specifies the use of air melted AISIE4340 steel per SAE AMS-S-5000(formerly MIL-S-5000)heat treated to 260 to 280 ksi(pounds per square inch 1000)as the baseline.This combination of alloy and heat treat levelhas been used for many years and a large database has beenaccumulated in the aerospace industry on its specific responseto exposure to a wide variety of maintenance chemicals,orelectroplated coatings,or both.Components with ultimatestrengths higher than 260 to 280 ksi may not be represented bythe baseline.In such cases,the cognizant engineering authorityshall determine the need for manufacturing specimens from thespecific material and heat treat condition of the component.Deviations from the baseline shall be reported as required by12.1.2.The sensitivity to hydrogen embrittlement shall bedemonstrated for each lot of specimens as specified in 9.5.1.4 Test procedures and acceptance requirements are speci-fied for seven specimens of different sizes,geometries,andloading configurations.1.5 Pass/Fail RequirementsFor plating/coating processes,specimens must meet or exceed 200 h using a sustained loadtest(SLT)at the levels shown in Table 3.1.5.1 The loading conditions and pass/fail requirements forservice environments are specified in Annex A5.1.5.2 If approved by the cognizant engineering authority,aquantitative,accelerated(24 h)incremental step-load(ISL)test as defined in Annex A3 may be used as an alternative toSLT.1.6 This test method is divided into two parts.The first partgives general information concerning requirements for hydro-gen embrittlement testing.The second is composed of annexesthat give specific requirements for the various loading andspecimen configurations covered by this test method(seesection 9.1 for a list of types)and the details for testing serviceenvironments.1.7 The values stated in the foot-pound-second(fps)systemin inch-pound units are to be regarded as standard.The valuesgiven in parentheses are mathematical conversions to SI unitsthat are provided for information only and are not consideredstandard.1.8 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:2B374 Terminology Relating to ElectroplatingB851 Specification for Automated Controlled Shot Peeningof Metallic Articles Prior to Nickel,Autocatalytic Nickel,or Chromium Plating,or as Final FinishD1193 Specification for Reagent WaterE4 Practices for Force Verification of Testing MachinesE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terials1This test method is under the jurisdiction of ASTM Committee F07 onAerospace and Aircraft and is the direct responsibility of Subcommittee F07.04 onHydrogen Embrittlement.Current edition approved Dec.1,2013.Published December 2013.Originallyapproved in 1977.Last previous edition approved in 2012 as F519 12a.DOI:10.1520/F0519-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE292 Test Methods for Conducting Time-for-Rupture NotchTension Tests of MaterialsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE709 Guide for M