1、Designation: F606M 10Standard Test Methods forDetermining the Mechanical Properties of Externally andInternally Threaded Fasteners, Washers, and Rivets(Metric)1This standard is issued under the fixed designation F606M; the number immediately following the designation indicates the year oforiginal ad
2、option 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.This standard has been approved for use by agencies of the Department of Defense.1
3、. Scope*1.1 These test methods cover establishment of proceduresfor conducting tests to determine the mechanical properties ofmetric externally and internally threaded fasteners, washers,and rivets.1.2 Property requirements and the applicable tests for theirdetermination are specified in individual
4、product standards. Inthose instances where the testing requirements are unique or atvariance with these standard procedures, the product shallspecify the controlling testing requirements.1.31.4 These test methods describe mechanical tests for deter-mining the following properties:Tests SectionFor Ex
5、ternally Threaded Fasteners: 3Product Hardness 3.1Proof Load 3.2.1Method 1, Length Measurement 3.2.3Method 2, Yield Strength 3.2.4Method 3, Uniform Hardness 3.2.5Axial Tension Testing of Full Size Prod-ucts3.4Wedge Tension Testing of Full SizeProducts3.5Tension Testing of Machined TestSpecimens3.6To
6、tal Extension at Fracture Test 3.7For Internally Threaded Fasteners: 4Product Hardness 4.1Proof Load 4.2Cone Proof Load Test 4.3For Washers and Direct Tension Indica-tors:5General Requirements 5.1Through Hardened Washers 5.2Carburized Washers 5.3For Rivets: 6Product Hardness 6.1Test for Embrittlemen
7、t of Metallic CoatedExternally Threaded Fasteners7Test Method for Determining Decarburiza-tion and Carburization8Test Method for Measuring CompressionLoads (All Finishes) on Direct TensionIndicators Covered by Test MethodF959MAnnex A11.5 The values stated in SI units are to be regarded asstandard. N
8、o other units of measurement are included in thisstandard.NOTE 1These test methods are the metric companion of Test MethodsF606.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of all of the users of this standard to es
9、tablishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E4 Practices for Force Verification of Testing MachinesE8M Test Methods for Tension Testing of Metallic Materi-als Metric3E10 Test Method fo
10、r Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE83 Practice for Verification and Classification of Exten-someter SystemsE92 Test Method for Vickers Hardness of Metallic Materi-alsE384 Test Method for Knoop and Vickers Hardness ofMaterialsF436M Sp
11、ecification for Hardened Steel Washers (Metric)F606 Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,1These test methods are under the jurisdiction of ASTM Committee F16 onFasteners and are the direct responsibility of Subcommittee F16.01 onTest
12、 Methods.Current edition approved May 1, 2010. Published May 2010. Originallyapproved in 1987. Last previous edition approved in 2007 as F606M 071.DOI:10.1520/F0606M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annua
13、l Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,
14、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Washers, Direct Tension Indicators, and RivetsF959M Specification for Compressible-Washer-Type DirectTension Indicators for Use With Structural Fasteners (Met-ric)F1624 Test Method for Measurement of Hydrogen Em-brit
15、tlement Threshold in Steel by the Incremental StepLoading TechniqueF2328M Test Method for Determining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts, Screws and Studs (Metric)3. Test Methods for Externally Threaded Fasteners3.1 Product HardnessTests shall be conducted
16、after theremoval of any surface oxide, decarburization, plating or othercoating. All readings shall be within the hardness values listedin the product specification. The average of all readings on thesame part shall be considered as the product hardness. Testresults shall conform to the product spec
17、ification for the lotrepresented by the test specimens to be considered conforming.Test specimen preparation and hardness tests shall be con-ducted in accordance with Test Method E18 for Rockwell tests,Test Method E10 for Brinell tests, Test Method E92 for Vickerstests, or Test Method E384 for Micro
18、hardness tests. Themethod used is at the option of the manufacturer, with regardsto the size and grade of the products.3.1.1 Routine Test LocationsFor testing the hardness ofthe finished product, the following test locations can be used:3.1.1.1 For hex and square head bolts, test shall be con-ducted
19、 on the wrench flats, top of head, unthreaded shank, endof bolt or at the arbitration location.3.1.1.2 For studs, products without parallel wrench flats,and for head styles other than hex and square, tests shall beconducted on the unthreaded shank, end of the bolt or stud orat the arbitration locati
20、on.3.1.1.3 Stress-relieved products (see 3.1.1.1 and 3.1.1.2) aremeasured anywhere on the surface or through the cross section.Refer to the product specification for particular test location oruse the arbitration location.3.1.1.4 The Rockwell hardness scale may be used for allproduct diameters; howe
21、ver, the Brinell hardness is limited toproducts over 30 mm nominal diameter.3.1.2 Laboratory InspectionAfter observing 3.1 and3.1.1, a minimum of three readings shall be taken on eachsample of finished product.3.1.3 Arbitration Test LocationFor purposes of arbitrationbetween the purchaser and seller
22、 over reported test results,hardness tests shall be conducted at the mid-radius (r/2) of atransverse section through the threads taken at a distance ofapproximately one diameter from the point end of the bolt orone end of the stud. Four readings shall be taken approximately90 to one another on the s
23、ame plane, if product size permits.Smaller diameter products may also use the opposite parallelsurface area of the bolt head end as sectioned above (see Fig.1). The use of Brinell hardness is limited to product sizesgreater than 48 mm nominal diameter.3.2 Tension TestsIt is preferred that fasteners
24、and studs betested full size, and it is customary, when so testing to specifya minimum ultimate load in kilonewtons (or stress in mega-pascals). Sections 3.2 through 3.5 apply when testing exter-nally threaded fasteners full size. Section 3.6 shall apply wherethe individual product specifications pe
25、rmit the use of ma-chined specimens (see Test Methods E8M).3.2.1 Proof LoadThe proof-load test consists of stressingthe product with a specified load that the product mustwithstand without measurable permanent set. Alternatives thatdetermine the ability of a fastener to pass the proof-load test aret
26、he yield strength test and the uniform hardness test. Any ofthese tests may be used, but the proof-load test ( 3.2.3) shall bethe arbitration method in case of any dispute (see Test MethodsE8M).3.2.2 In both Methods 1 and 2, assemble the product in thefixture of the tension testing machined so that
27、six completethreads (except for heavy hex structural bolts, which shall bebased on four threads) are exposed between the grips. This isobtained by freely running the nut or fixture to the threadrunout of the specimen and then unscrewing the specimen sixfull turns. For continuous threaded fasteners,
28、at least six fullthreads shall be exposed.3.2.3 Test Method 1, Length MeasurementTo ensure con-sistent and repetitive length measurements of the fastener, thethreaded end and top of the bolt head shall have conicalFIG. 1 Hardness Arbitration Test LocationF606M 102depressions made at the approximate
29、axis or center line of thefastener. If raised or depressed markings on the head interferewith the placement of the measuring depressions, the headshall be carefully ground. The measuring instrument shall havepointed anvils that mate with the center line depressions and becapable of measuring changes
30、 in length of 0.0025 mm with anaccuracy of 0.0025 mm in any 0.025 mm range. Place thefastener between the measuring anvils and rotate it approxi-mately14 turn to the left center, right then center again toassure sound seating. Zero the instrument or record indicatedmeasurement. If using a bolt exten
31、someter, the bolt withattached extensometer may be assembled into the tensiontesting machine. If not, mark the fastener so it may be placedas close as possible to the same position for the second reading.Remove and assemble the fastener into the tension testingmachine as outlined in 3.4. With a test
32、 speed which shall notexceed 3 mm/min, as determined with a free-running crosshead, axially load the fastener to the proof load value specifiedin the product specification. This load shall be maintained fora period of 10 s before releasing the load. Replace the fastenerbetween the measuring anvils a
33、nd rotate as before, stoppingwith the mark at the same approximate position as the firstreading. The measurement shall show no permanent elonga-tion. A tolerance of 60.013 mm shall be allowed (for mea-surement error only) between the measurement made beforeloading and that made after loading. Variab
34、les such as straight-ness, thread alignment, or measurement error could result inapparent elongation of the product when the specified proofload is initially applied. In such cases, the product may beretested using a 3 % greater load, and shall be consideredacceptable if there is no difference in th
35、e length measurementafter this loading within a 0.013-mm measurement tolerance asoutlined.3.2.3.1 Proof Load-Speed and Time of LoadingWhenusing Method 1, the speed of testing, as determined with afree-running cross head, shall not exceed 3 mm/min, and theproof load shall be maintained for a period o
36、f 10 s beforereleasing the load.3.2.4 Method 2, Yield StrengthAssemble the product inthe testing equipment as outlined in 3.4.As the load is applied,measure and record the total elongation of the product or anypart of it that includes the exposed threads to produce aload-elongation diagram. Determin
37、e the load or stress at anoffset equal to 0.2 % of the length of fastener occupied by sixfull threads as shown in Fig. 2, (except for heavy hex structuralbolts, which shall be based on four threads) by the methoddescribed in 3.6.3.1.3.2.4.1 Method 2A, Yield Strength for Austenitic StainlessSteel and
38、 Nonferrous MaterialsAssemble the product in thetesting equipment as outlined in 3.4. As the load is applied,measure and record the total elongation of the product in orderto produce a load elongation diagram. Determine the load orstress at an offset equal to 0.2 % strain, based on the length ofthe
39、bolt between the holders as shown in Fig. 2, which will besubject to elongation under load, by using the method de-scribed in 3.6.3.1.3.2.5 Method 3, Uniform HardnessThe fasteners shall betested for hardness as described in 3.1, and in addition, thehardness shall also be determined in the core. The
40、differencebetween the mid-radius and core hardness shall be not morethan three points on a Rockwell C Scale; and both readingsmust be within product specification.NOTE 2This test is valid for fasteners up to and including 25 mm indiameter.3.3 Fasteners and Studs Too Short for Tension TestingProduct
41、lengths less than those shown in Table 1 for product 5through 20 mm in diameter and less than 3 diameters in lengthfor product greater than 20 mm in diameter, or that do not havesufficient threads for proper engagement, and still leave theFIG. 2 Tension Testing of Full-Size Fastener (Typical Set-Up)
42、F606M 103specified number of complete threads exposed between thegrips, shall be deemed too short for tension testing, andacceptance shall be based on a hardness test performed inaccordance with 3.1. If tests other than product hardness arerequired, their requirements should be referenced in the pro
43、d-uct specification.3.4 Axial Tension Testing of Full Size Products:3.4.1 Test fasteners in a holder with a load axially appliedbetween the head and a nut or suitable fixture (see Fig. 2),either of which shall have sufficient thread engagement todevelop the full strength of the product. Assemble the
44、 nut orfixture on the product, leaving six complete fastener threadsexposed between the grips (except for heavy hex structuralfastener, which shall have four threads exposed between grips).3.4.2 Test studs by assembling one end of the threadedfixture to the thread runout. For studs having unlike thr
45、eads,this shall be the end which has the finer pitch thread, or withthe larger minor diameter. Likewise, assemble the other end ofthe stud in the threaded fixture, leaving six complete threadsexposed between the grips. For continuous studs, at least sixcomplete threads shall be exposed between the f
46、ixture ends.The maximum speed of the free running cross head shall notexceed 25 mm/min. When reporting the tensile strength of theproduct, calculate the thread stress area as follows:As5 0.7854 D 2 0.9382P!2(1)where:As= thread stress area, mm2,D = nominal diameter of the fasteners or stud, mm, andP
47、= thread pitch, mm.3.4.3 To meet the requirements of the test described in 3.4.1and 3.4.2, the product shall support a load prior to fracture notless than the minimum tensile strength specified in the productspecification for its size, property class, and thread series. Inaddition, fracture shall oc
48、cur in the body or the threadedsection with no fracture at the juncture of the body and head.3.5 Wedge Tension Testing of Full-Size ProductThewedge tensile strength of a hex or square-head fastener,socket-head cap screw, (with the exception of socket button orflat countersunk head products) or stud
49、is the tensile load thatthe product is capable of sustaining when stressed with awedge under the head. The purpose of this test is to obtain thetensile strength and demonstrate the “head quality” and duc-tility of the product.3.5.1 Wedge Tension Testing of Fasteners Determine theultimate load of the fastener as described in 3.4 except place awedge under the fastener head. When both wedge and proofload testing are required by the product specification use theproof load-tested fastener for wedge testing. The wedge shallhave a minimum hardness of 45 HRC.Addition
