1、Designation: F606 14Standard Test Methods forDetermining the Mechanical Properties of Externally andInternally Threaded Fasteners, Washers, Direct TensionIndicators, and Rivets1This standard is issued under the fixed designation F606; the number immediately following the designation indicates the ye
2、ar 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. Depart
3、ment of Defense.1. Scope*1.1 These test methods cover establishment of proceduresfor conducting tests to determine the mechanical properties ofexternally and internally threaded fasteners, washers, directtension indicators, and rivets.1.2 Property requirements and the applicable tests for theirdeter
4、mination are specified in individual product standards. Inthose instances where the testing requirements are unique or atvariance with these standard procedures, the product standardshall specify the controlling testing requirements. In theabsence of any specified test requirement(s), these test met
5、hodsshall apply.1.3 These test methods describe mechanical tests for deter-mining the following properties:SectionFor Externally 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 Test
6、ing of Full-Size Product 3.4Wedge Tension Testing of Full-Size Product 3.5Tension Testing of Machined Test Specimens 3.6Total Extension at Fracture TestSingle Sheer Test3.73.8For Internally Threaded Fasteners: 4Product Hardness 4.1Proof Load Test 4.2Cone Proof Load Test 4.3For Washers and Direct Ten
7、sion Indicators: 5Product Hardness-General Requirements 5.1Through Hardened Washers 5.2Carburized Washers 5.3Stainless Steel and Nonferrous Washers 5.4Direct Tension Indicators 5.5Compression Load 5.6For Rivets: 6Product Hardness 6.1Test for Embrittlement of Metallic-Coated Externally ThreadedFasten
8、ers7Test Method for Determining Decarburization and Carburization 81.4 The values stated in inch-pound units are to be regardedas standard. No other units of measurement are included in thisstandard.NOTE 1Acomplete metric companion to Test Methods F606 has beendevelopedF606M; therefore, no metric eq
9、uivalents are shown in thesetest methods.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
10、 limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A394 Specification for Steel Transmission Tower Bolts,Zinc-Coated and BareE4 Practices for Force Verification of Testing MachinesE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE10 Test Method for Brinell Hardness of
11、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 Materials(Withdrawn 2010)3E384 Test Method for Knoop and Vickers Hardness ofMaterialsF436 Specifica
12、tion for Hardened Steel Washers1These test methods are under the jurisdiction of ASTM Committee F16 onFasteners and are the direct responsibility of Subcommittee F16.01 on TestMethods.Current edition approved July 1, 2014. Published August 2014. Originallyapproved in 1979. Last previous edition appr
13、oved in 2013 as F606 13. DOI:10.1520/F0606-14.2For 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 appro
14、ved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1F606M Test Methods for Determining the Mechanical Pr
15、op-erties of Externally and Internally Threaded Fasteners,Washers, and Rivets (Metric)F959 Specification for Compressible-Washer-Type DirectTension Indicators for Use with Structural FastenersF1624 Test Method for Measurement of Hydrogen Em-brittlement Threshold in Steel by the Incremental StepLoadi
16、ng TechniqueF2328 Test Method for Determining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts, Screws and Studs2.2 Military Standard:4MIL STD 1312, Test 13 and Test 203. Test Methods for Externally Threaded Fasteners3.1 Product HardnessTests shall be conducted after the
17、removal 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 specification
18、 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 Methods E18 for Rockwelltests, Test Method E10 for Brinell tests, Test Method E92 forVickers tests, or Test Method E384 for Microhardness
19、 tests.The method used is at the option of the manufacturer, withregards to 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 on the
20、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 andfor head styles other than hex and square; tests shall beconducted on the unthreaded shank, end of the bolt or stud orat the arbitration location.3.1.1.
21、3 Stress relieved products (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; however, the Brin
22、ell hardness is limited toproducts over 112-in. nominal diameter.3.1.2 Laboratory InspectionAfter observing 3.1 and 3.1.1,a minimum of three readings shall be taken on each sample offinished product.3.1.3 Arbitration Test LocationFor purposes of arbitrationbetween the purchaser and seller over repor
23、ted 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 from the pointend of the bolt or one end of the st
24、ud. Four readings shall betaken approximately 90 to one another on the same plane, ifproduct size permits. Smaller diameter products may also usethe opposite parallel surface area of the bolt head end assectioned above (see Fig. 1). The use of Brinell hardness islimited to product sizes greater than
25、 214-in. nominal diameter.3.2 Tension TestsIt is preferred that bolts and studs betested full size, and it is customary, when so testing, to specifya minimum ultimate load (or stress) in pounds-force (orpounds-force per square inch.) Sections 3.2 3.5 apply whentesting externally threaded fasteners f
26、ull size. Section 3.6 shallapply where the individual product specifications permit theuse of machined specimens (see Test Methods E8/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. Alter
27、native testsfor determining the ability of a fastener to pass the proof-loadtest are the yield strength test and the uniform hardness test.Either Method 1 (3.2.3), Method 2 (3.2.4), or Method 3 (3.2.5)may be used, but Method 1 shall be the arbitration method incase of any dispute as to acceptance of
28、 the product (see TestMethods E8/E8M).3.2.2 In both Methods 1 and 2, assemble the product in thefixture of the tension testing machine so that six complete4DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA19111-5094 http:/quicksearch.dla.mil/FIG. 1 Hardness Arbitration Test Loca
29、tionF606 142threads (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 thread bolts, at lea
30、st six full threadsshall be exposed between the fixture ends; however, for refereepurposes, six full threads shall be exposed.3.2.3 Method 1, Length MeasurementTo ensure consistentand repetitive length measurements of the fastener, thethreaded end and top of the bolt head shall have conicaldepressio
31、ns made at the approximate axis or center line of thefastener. In the event of a dispute over test results the test shallbe conducted after the removal of all manufacturer or grademarkings, surface oxide, decarburization, plating, othercoating, or a combination thereof, to achieve a clean, flatsurfa
32、ce and the conical depressions shall be created using alathe or some type of centering fixture. All debris shall beremoved from the conical depressions before measuring thepart. When fasteners are too long to test in the availableequipment they may be cut to 8 inches 6 0.125 and testedusing Method 1
33、. If there is a dispute over results when testingthe same part or lot of parts both full size and cut to 8 inchesthe 8 inch test results shall be used to determine acceptance.The measuring instrument shall have pointed anvils whichmate with the center line depressions and be capable ofmeasuring chan
34、ges in length of 0.0001 in. with an accuracy of0.0001 in. in any 0.001 in. range. Place the fastener betweenthe measuring anvils. The fastener shall be rotated at least 360degrees to assure sound seating. At the position where thelowest value is indicated the instrument shall be zeroed or theindicat
35、ed measurement shall be recorded. If using a boltextensometer, the bolt with attached extensometer may beassembled into the tension testing machine. If not, mark thefastener so it may be placed as close as possible to the sameposition for the second reading. Remove and assemble thefastener into the
36、tension testing machine as outlined in 3.4.With a test speed which shall not exceed 0.12 in./min, asdetermined with a free-running cross head, axially load thefastener to the proof load value specified in the productspecification. This load shall be maintained for a period of 10s before releasing th
37、e load. Replace the fastener between themeasuring anvils and rotate at least 360 degrees as before. Thefastener shall be stopped at the position where the lowest valueis indicated. The measurement shall show no permanentelongation. A tolerance of 60.0005 in. shall be allowed (formeasurement error on
38、ly) between the measurement madebefore loading and that made after loading. Variables such asstraightness, thread alignment, or measurement error couldresult in apparent elongation of the product when the specifiedproof load is initially applied. In such cases, the product maybe retested using a 3 %
39、 greater load, and shall be consideredacceptable if there is no difference in the length measurementafter this loading within a 0.0005 in. measurement tolerance asoutlined.3.2.4 Method 2, Yield StrengthAssemble the product inthe testing equipment as outlined in 3.4.As the load is applied,measure and
40、 record the total elongation of the product or anypart of it that includes the exposed threads to produce aload-elongation diagram. Determine the load or stress at anoffset equal to 0.2 % of the length of bolt occupied by six fullthreads as shown in Fig. 2 (except for heavy hex structuralbolts, whic
41、h 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 Non-ferrous 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
42、in orderto produce a load elongation diagram. Determine the load orstress at an offset equal to 0.2 % strain based on the length ofthe bolt between the holders as shown in Fig. 2, which will besubject to elongation under load by using the method describedin 3.6.3.1.FIG. 2 Tension Testing of Full-Siz
43、e Bolt (Typical Set-Up)F606 1433.2.5 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 differencebetween the mid-radius and core hardness shall be not morethan 3 points on a Rockwell C Scale
44、; and both readings mustbe within product specification. This test is valid for fastenersup to and including 1 in. in diameter.3.3 Bolts or Studs Too Short for Tension TestingProductlengths less than those shown in Table 1 for product14 through34 in. in diameter and less than three diameters in leng
45、th forproduct above34 in. in diameter, or that do not have sufficientthreads for proper engagement and still leave the specifiednumber of complete threads exposed between the grips, shallbe deemed too short for tension testing, and acceptance shall bebased on a hardness test performed in accordance
46、with 3.1.Iftests other than product hardness are required, their require-ments should be referenced in the product specification. Whendifferences in tensile testing lengths exist between this standardand product standards, the requirements of the product stan-dard shall take precedence. Minimum leng
47、th in Table 1indicates the nominal specified length of the product (that is anA449 Hex Cap Screw size is specified as12-13118 indicates118 in. is the nominal length).3.4 Axial Tension Testing of Full-Size Products:3.4.1 Test bolts in a holder with the load axially appliedbetween the head and a nut o
48、r suitable fixture (Fig. 2), either ofwhich shall have sufficient thread engagement to develop thefull strength of the product. Assemble the nut or fixture on theproduct, leaving a minimum of six complete bolt threadsexposed between the grips except for heavy hex structuralbolts, which shall have fo
49、ur complete threads exposed betweenthe grips.3.4.2 Test studs by assembling one end in the threadedfixture to the thread runout. For studs having unlike threads,this shall be the end with the finer pitch thread, or with thelarger minor diameter. Likewise, assemble the other end of thestud in a threaded fixture, leaving six complete threads exposedbetween the grips. For continuous thread studs, at least sixcomplete threads shall be exposed between the fixture ends.The maximum speed of the free-running cross head shall notexceed 1 in./min. When reporting th
