1、Designation: F519 12aF519 13Standard 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,
2、 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.
3、1 This test method describes mechanical test methods and defines acceptance criteria for coating and plating processes thatcan cause hydrogen embrittlement in steels. Subsequent exposure to chemicals encountered in service environments, such as fluids,cleaning treatments or maintenance chemicals tha
4、t come in contact with the plated/coated or bare surface of the steel, can also beevaluated.1.2 This test method is not intended to measure the relative susceptibility of different steels. The relative susceptibility ofdifferent materials to hydrogen embrittlement may be determined in accordance wit
5、h Test Method F1459 and Test Method F1624.1.3 This test method specifies the use of air meltedAISI E4340 steel per SAEAMS-S-5000 (formerly MIL-S-5000) heat treatedto 260 to 280 ksi (pounds per square inch 1000) as the baseline. This combination of alloy and heat treat level has been used formany yea
6、rs and a large database has been accumulated in the aerospace industry on its specific response to exposure to a widevariety of maintenance chemicals, or electroplated coatings, or both. Components with ultimate strengths higher than 260 to 280ksi may not be represented by the baseline. In such case
7、s, the cognizant engineering authority shall determine the need formanufacturing specimens from the specific material and heat treat condition of the component. Deviations from the baseline shallbe reported as required by 12.1.2. The sensitivity to hydrogen embrittlement shall be demonstrated for ea
8、ch lot of specimens asspecified in 9.5.1.4 Test procedures and acceptance requirements are specified for seven specimens of different sizes, geometries, and loadingconfigurations.1.5 Pass/Fail RequirementsFor plating/coating processes, specimens must meet or exceed 200 h using a sustained load test(
9、SLT) at the levels shown in Table 3.1.5.1 The loading conditions and pass/fail requirements for service environments are specified in Annex A5.1.5.2 If approved by the cognizant engineering authority, a quantitative, accelerated ( 24 h) incremental step-load (ISL) testas defined in Annex A3 may be u
10、sed as an alternative to SLT.1.6 This test method is divided into two parts. The first part gives general information concerning requirements for hydrogenembrittlement testing. The second is composed of annexes that give specific requirements for the various loading and specimenconfigurations covere
11、d by this test method (see section 9.1 for a list of types) and the details for testing service environments.1.7 The values stated in the foot-pound-second (fps) system in inch-pound units are to be regarded as standard. The values givenin parentheses are mathematical conversions to SI units that ar
12、e provided for information only and are not considered standard.1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the appli
13、cability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B374 Terminology Relating to Electroplating1 This test method is under the jurisdiction of ASTM Committee F07 on Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.04 on HydrogenEmbritt
14、lement.Current edition approved Nov. 15, 2012Dec. 1, 2013. Published December 2012December 2013. Originally approved in 1977. Last previous edition approved in 2012 asF519 12.F519 12a. DOI: 10.1520/F0519-12A.10.1520/F0519-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or con
15、tactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have be
16、en made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official documen
17、t.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1B851 Specification for Automated Controlled Shot Peening of Metallic Articles Prior to Nickel, Autocatalytic Nickel, orChromium Plating, or as Final FinishD1193 Specification for Reage
18、nt WaterE4 Practices for Force Verification of Testing MachinesE8/E8M Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE292 Test Methods
19、 for Conducting Time-for-Rupture Notch Tension Tests of MaterialsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test MethodE709 Guide for Magnetic Particle TestingE1417 Practice for Liquid Penetrant TestingE1444 Practice for Magnetic Particle TestingE1823 Termi
20、nology Relating to Fatigue and Fracture TestingF1459 Test Method for Determination of the Susceptibility of Metallic Materials to Hydrogen Gas Embrittlement (HGE)F1624 Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading TechniqueF2078 Terminology
21、Relating to Hydrogen Embrittlement TestingG5 Reference Test Method for Making Potentiodynamic Anodic Polarization MeasurementsG38 Practice for Making and Using C-Ring Stress-Corrosion Test Specimens2.2 SAE AMS Standard:3AMS 2430 (R) Shot Peening, AutomaticAMS 2759/2 Heat Treatment of Low-Alloy Steel
22、 Parts Minimum Tensile Strength 220 ksi (1517 MPa) and HigherAMS 2759/11 Stress Relief of Steel PartsAMS 6360 Steel Tubing, Seamless 0.95Cr 0.20Mo (0.28 0.33C) (SAE 4130) Normalized or Stress RelievedAMS-QQ-P-416 Plating, Cadmium (Electrodeposited)3 Available from Society of Automotive Engineers (SA
23、E), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.TABLE 1 Lot Acceptance Criteria for Notched SpecimensType Item Sampling ofEach Lot Requirement/Method1 Tensile Strength 4 eachTest Method E8. Tensilestrength of each specimenmust be within 10 ksi of theaverage.1 HardnessA 5 % 51
24、to 53 HRC per TestMethods E18.Round the average ofthree readings perspecimen per PracticeE29.1 Dimensions 100 % Meet tolerances ofcorrespondingdrawings. Notchdimension verified withshadow graphicprojection at 50 to100 or equivalent.1 Notched FractureStrength (NFS)10 ea Test Methods E8/E8M. NFS ofeac
25、h specimenmust be within 10 ksiof the average.1c Self-loadingnotched roundspecimen bendfixture, Fig. A2.710 ea Alternate: The number ofturns of the loadingbolt, which is requiredto produce fracture ineach specimen, must bewithin 5 % of theaverage.1d Self-loadingnotched C-Ringbend fixture,Fig. A2.810
26、 ea Alternate: The change indiameter at fractureload for each specimenmust be within 0.008inches of the average.A If the hardness requirements of any of the sampled specimens are not satisfied,only those specimens of the lot that are individually inspected for conformance tothese requirements shall
27、be used for testing.F519 132AMS-S-5000 Steel, Chrome-Nickel-Molybdenum (E4340) Bars and Reforging Stock2.3 Military and Federal Standards and Commercial Item Descriptions:4MIL-PRF-16173 Corrosion Preventive Compound, Solvent Cutback, Cold-ApplicationCommercial Item Description (CID) A-A-55827 Chromi
28、um Trioxide, Technical3. Terminology3.1 DefinitionsDefinitions of terms used in this test method may be found in Terminology B374, Terminology E1823 andTerminology F2078.3.2 Acronyms and Abbreviations:AISI = American Iron and Steel Institutea/W = notch depth-to-width ratiod/D = ratio of minor to maj
29、or diameters at the notchESH = Environmental, Safety and Healthfps = foot pound secondHRC = Rockwell Hardness Scale CID = inside diameterISL = incremental step loadkip = pounds load multiplied by 1000ksi = pounds-force per square inch multiplied by 1000Kt = stress concentration factorLS = longitudin
30、al short transverseNFS = notched fracture strengthOD = outside diameter4 Copies of these documents are available at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700Robins Ave., Building 4D, Philadelphia, PA 19111-5094.TABLE 2 El
31、ectroplating Bath Compositions and Operating Conditions for Sensitivity TestItem Treatment A Treatment BBath composition: Range OptimumCadmium (as CdO) 2.9 to 5.5 oz/gal (22 to41 g/L)4.5 oz/gal (33.7 g/L) same as Treatment ATotal Sodium cyanide(NaCN)12.0 to 16.0 oz/gal (89.9to 120 g/L)14 oz/gal (104
32、 g/L) same as Treatment ARatio NaCN to CdO 2.8/1 to 6.0/1 3.0/1 same as Treatment ApH 12.0 or greater 12.0 same as Treatment ATemperature 7090F (2132C) 75F (24C) same as Treatment ASodium hydroxide(NaOH)A1.0 to 3.2 oz/gal (7.5 to24.0 g/L)2.5 oz/gal (18.7 g/L) same as Treatment ABrightener such asCol
33、cad 100B orequivalentManufacturers suggested range NoneElectroplating current 10 A/ft2 (108 A/m2) 60 A/ft2 (645 A/m2)Electroplating time 30 minutes 6 minutesBakingBaking temperature 375 25F (190 14C) same as Treatment ABaking time: Type 1SpecimenDo Not Bake 23 hBaking time: Type 2aSpecimen8 h 23 hCh
34、romate TreatmentC Yes same as Treatment AA Addition of sodium hydroxide may not be required on solution makeup, since the addition of 1 oz/gal of cadmium oxide is equivalent to 0.6 oz/gal of free hydroxide.BThe sole source of manufacture of Colcad 100 known to the committee at this time is Columbia
35、Chemical in Brunswick, Ohio, . If you areaware of alternative manufacturers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee, which you may attend.C After baking, the specimens sha
36、ll be dipped into any appropriate chromate conversion coating solution for minimum time that will produce an adherent and continuouscoating as described in AMS-QQ-P-416 Type II.TABLE 3 Pass/Fail Loading Requirements of Test SpecimensType 1a, 1b, 1c, 1d, 1e 75 % of the tensile or bend NFS (Table 1).T
37、ype 2a 92 % of the Test Methods E8/E8M, E4 ultimatestrength, obtained by deflecting a 2.300-inch diameterO-Ring specimen with a 2.525-inch stressing bar.F519 133psi = pounds-force per square inchRMS = root mean squareSAE AMS = Society of Automotive Engineers Aerospace Material SpecificationSCE = sat
38、urated calomel electrodeSLT = sustained load testT.I.R. = total indicated runout4. Summary of Test Methods4.1 Plating/coating ProcessesUnstressed test specimens are cleaned, plated/coated, and baked (if applicable) in accordancewith the specification to which the process is to be qualified. Specimen
39、s are then maintained under a sustained load in air tomeasure the time to rupture/completion of the test period.4.2 Service EnvironmentsSpecimens are tested in the service environment. The sequence of exposure to the environment andloading shall be as defined in Annex A5. If plated/coated test speci
40、mens are to be utilized for evaluating a service environment,then the plating/coating process must first be determined to be acceptable in accordance with 4.1.5. Significance and Use5.1 Plating/coating ProcessesThis test method provides a means by which to detect possible hydrogen embrittlement of s
41、teelparts during manufacture by verifying strict controls during production operations such as surface preparation, pretreatments, andplating/coating. It is also intended to be used as a qualification test for new plating/coating processes and as a periodic inspectionaudit for the control of a plati
42、ng/coating process.5.2 Service EnvironmentThis test method provides a means by which to detect possible hydrogen embrittlement of steel parts(plated/coated or bare) due to contact with chemicals during manufacturing, overhaul and service life. The details of testing in aservice environment are found
43、 in Annex A5.6. Apparatus6.1 Testing MachineTesting machines shall be within the guidelines of calibration, force range, resolution, bending strain, andverification of Practices E4 and Test Methods E292 as applicable.6.1.1 The force measurement on test machines used for notched round tension specime
44、ns, shall be via analytical calculationssuch as for dead weight or lever arm type hanging weight machines, or by routine empirical measurement (electronic output) suchas for strain gauge load cells. Estimating test loads that are derived from load ring deflections only is not allowed, unless the eff
45、ectsof specimen grip joint compliance is known, is accounted for, and within Practice E4 and Test Method E8/E8M tolerances. Straingauge load cell measurements/results can be used in conjunction with load ring deflections.6.2 Gripping DevicesVarious types of gripping devices may be used in either ten
46、sion or bending to transmit the load appliedby the testing machine or self-loading frame to the test specimen.6.3 Series LoadingSamples may be loaded on a test frame either individually or by multiples in series. All specimens loadedonto an individual test frame shall have the same certified NFS 6 1
47、 %. In the event that one or more of the specimens fractureduring the designated test period, the fractured specimen(s) shall be removed, replaced with a dummy specimen and the load chainplaced back under load. The total time under load (that is, test duration) for the remaining specimens shall be e
48、xtended by anytime-off-load as detailed in 6.3.1. The procuring specification or cognizant engineering authority may elect to restrict loading toone specimen per test frame.6.3.1 Extended Time Under Load (ETUL)If the total time-off-load (wall clock) exceeds 10 % of the total test duration (forexampl
49、e. 20-h for a 200-h test); then the time under load shall be extended by the amount of time-off-load in excess of 10 % (thatis, in excess of 20 h). The procuring specification or cognizant engineering authority may elect to waive this extended time underload (ETUL) protocol.EXAMPLE 1 for SLTFour cadmium-plated specimens representing a single plating bath are loaded on an individual SLT test frame as part of a monthly plating bath verification. One ofthe four specimens fractures after 180 h (initial time under load = 180
