1、Designation: F680 80 (Reapproved 2012)Standard Test Methods forNails1This standard is issued under the fixed designation F680; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in parentheses indic
2、ates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover procedures for the testing ofnails. The test or tests selected, and the requirements forcompliance, will be as specified in the applicabl
3、e productstandard. Performance tests for nail withdrawal and lateral loadcapability are not included as they are covered by Test MethodsD1761.1.2 The tests described are as follows:SectionDimensional tests 5Tension test 6Conventional bend test 7Impact bend test 8Rockwell hardness test 9Coating weigh
4、t test 10Coating adherence test for zinc-coated nails 111.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not pu
5、rport to address all of thesafety problems, 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:2A
6、90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA428/A428M Test Method for Weight Mass of Coating onAluminum-Coated Iron or Steel ArticlesD1761 Test Methods for Mechanica
7、l Fasteners in WoodE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsF547 Terminology of Nails for Use with Wood and Wood-Base MaterialsF592 Terminology of Collated and Cohered Fasteners andTheir Application Tools3. Terminology3.1 DefinitionsFor definitions of terms used in this testmetho
8、d, refer to Terminology F547 and F592.4. Significance and Use4.1 When specified, the tests selected for application shallbe performed to assure conformance with requirements stipu-lated in the product specification.5. Dimensional Tests5.1 Dimensions to be evaluated include, but shall not belimited t
9、o length, stock diameter, diameter or major dimensionsof head, straightness, head concentricity to shank, and length ofpoint. For mechanically deformed nails, angle, depth, andconfiguration of deformations shall be measured as specified.Other dimensional characteristics shall be measured whenrequire
10、d. Any suitable measuring means may be applied.6. Tension Test6.1 Nails are not subject to tension testing. However, wireused to make the nails may be tested as required by prioragreement or to affect mill product control. The testing of wireis covered in the general section of Test Methods A370 and
11、Supplement IV, Round Wire Products.7. Conventional Bend Test7.1 This test is used as a means of testing the ductility ofcertain types of nails or of the wires used in the manufacture ofnails. The angle of bend and the mandrel diameter will bespecified in the product specification. The cold bending s
12、hallbe performed by any hand or power device that will deform thesample closely about a mandrel of specified diameter throughthe required angle without causing damage to the nail surface.The sample shall be considered to have failed if fracture occursprior to attainment of the required minimum bend
13、angle.Unless otherwise specified, the conventional bend test shall not1These test methods are under the jurisdiction of ASTM Committee F16 onFasteners and are the direct responsibilities of Subcommittee F16.05 on Driven andOther Fasteners.Current edition approved Dec. 1, 2012. Published January 2013
14、. Originallyapproved in 1980. Last previous edition approved in 2007 as F680-80(2007). DOI:10.1520/F0680-80R12.2For 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 s
15、tandards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1be applied to annularly threaded nails or to the region of a nailexhibiting gripper marks.8. Impact Bend Test8.1 The impact test is prim
16、arily applicable to the testing ofpallet nails to assess their suitability for that application. Thetesting device is shown in Fig. 1 and its operation is describedin Annex A1. For any given diameter, the data from this testcan be correlated with Rockwell hardness used to specify themechanical prope
17、rties of the nail. The impact bend test isintended as a convenient test that may be used in manufactur-ing and consumer quality monitoring of mechanical properties.However, in the case of dispute, the Rockwell hardness test,supplemented by the conventional bend test, will be consideredthe governing
18、test.9. Rockwell Hardness Test9.1 This test is used to measure the hardness of heat-treatednails. Prepare flat surfaces by grinding or filing. Take care notto alter the tempered hardness of the nail during preparation ofthe flats. The width of the prepared flat shall be sufficient toprevent edge bul
19、ge adjacent to each hardness impression. Thethickness at the test section shall be sufficient to avoid a bulgeor other visible markings on the surface opposite to theimpression. Hardness can be determined using a shank havingprepared parallel surfaces. Determine the hardness in accor-dance with Test
20、 Methods E18. Usually three readings are madeon a nail and these readings are averaged for the final result.9.2 An alternate method for determining Rockwell hardnessis to cut the nail off about12 in. (13 mm) from the head. Grindthe top of the head to remove scale and obtain a flat surface.Grind the
21、transversely cut end flat, using proper precautionsnot to alter the tempered hardness of the nail. Place the samplehead down on the anvil of the hardness testing machine anddetermine the hardness on the transverse section.10. Coating Weight Test10.1 This test deals with zinc, aluminum, and copper-cl
22、adcoatings only and does not deal with other metallic coatingssuch as cadmium.10.2 Cut the heads and points from samples of zinc-coatedor aluminum-coated nails selected for testing. Take a sufficientnumber of such specimens to provide a total length over 12 in.NOTE 1This device is available from The
23、 National Wooden Pallet and Container Assn., 1625 Massachusetts Ave., Washington, DC 20036FIG. 1 A Typical Impact Bend Tester for the Impact Bend Testing of NailsF680 80 (2012)2(300 mm), preferably about 24 in. (600 mm). Since the densityof the steel is known (0.2836 lb/in.3(0.1276 kg/m3), it is not
24、necessary to use a specific total length of specimens.10.3 Determine the weight of zinc coating in accordancewith Test Method A90/A90M.10.4 Determine the weight of aluminum coating in accor-dance with Test Method A428/A428M.10.5 Determine the thickness of coating of copper-clad nailsby one of the fo
25、llowing three methods:10.5.1 Accurately measuring the diameter of the wire beforeand after removing the cladding by any suitable means.10.5.2 Cutting off the wire, grinding one end smooth,etching the exposed cross section to differentiate between coreand cladding, and measuring under suitable magnif
26、ication.10.5.3 Using electrical indicating instruments.10.6 Calculate the weight of the copper cladding from thethickness as measured above or determine the weight of thecladding by chemically stripping the copper and accuratelyweighing the wire sample before and after stripping.11. Coating Adherenc
27、e Test for Zinc-Coated Nails11.1 Determine the adherence of the zinc coating to thesurface of the base metal by cutting or prying with the point ofa stout knife, applied with considerable pressure in a mannertending to remove a portion of the coating. The adherence shallbe considered inadequate if t
28、he coating flakes off in the form ofa layer or skin so as to expose the base metal in advance of theknife point. Testing carried out at edges or corners (points oflowest coating adherence) shall not be used to determineadherence of coating. Likewise, removal of small particles ofthe coating by parin
29、g or whittling shall not be used todetermine failure.12. Precision and Bias12.1 The precision and bias of these tests have not beendetermined at this time.ANNEX(Mandatory Information)A1. OPERATION OF THE IMPACT BEND TESTER (FIG. NO. 1)A1.1 ScopeThe test is applicable to nails with shankdiameters of
30、0.106 in. (2.7 mm) to 0.135 in. (3.4 mm) andlengths of 112 in. (38 mm) to 3 in. (76 mm) and with or withoutdeformations.A1.2 Hold the nail to be tested in a chuck in such a way thatit cantilevers1532 in. (12 mm) at an angle of 80 to the vertical.Hit its head after the free-fall drop of a 3.50-lb (1.
31、58-kg)weight from a 15716 in. (392 mm) height, thereby applying54.0 in.lbf (6.1-J potential or 4.52-J kinetic) energy to the headof the inclined nail. As a result of this impacting, soft nails arebent readily without breaking and non-ductile nails failabruptly partially or completely while being ben
32、t only a fewdegrees. The test includes recording the bend angle of thetested nail as well as the number and type of failure, if any.A1.3 The impact bend test device, shown in Fig. 1, shallconsist of a 0.750-in. (19.0-mm) diameter shaft, along whichthe 3.50-lb (1.58-kg) drop weight slides to hit the
33、head of thenail. A protractor shall be used to measure the angle of thetested nail.A1.4 Measure the dimensions of the nails prior to testing.Replace chuck inserts with worn edges with new ones. Positionthe specimen properly between the chuck inserts in such a waythat the specimen protrudes1532 in. (
34、12 mm) from the inserts.Tighten the chuck securely, to prevent the displacement of thenail during application of the impact load, and release the dropweight. Record the type of failure, if any, and the bend anglefor each nail and determine the average bend angle for the nailstested.ASTM Internationa
35、l takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their o
36、wn responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be a
37、ddressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,
38、at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F680 80 (2012)3
