ASTM_A_66_-_07_2013.pdf

Designation:A6607(Reapproved 2013)Standard Specification forSteel Screw Spikes1This standard is issued under the fixed designationA66;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 Department of Defense.1.Scope1.1 This specification covers steel screw spikes used asfastenings between railroad rails,tie plates,and ties.1.2 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.1.3 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:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for Shipment3.Ordering Information3.1 Orders for screw spikes under this specification shallinclude the following information as appropriate:3.1.1 Quantity(weight),3.1.2 Style of HeadA,B,or C3or other,including draw-ings if necessary,3.1.3 Type of Pointpilot point or not pointed,3.1.4 Dimensionsdiameter and length,under head,3.1.5 Supplementary Requirement if to apply(see S1)3.1.6 Certification and Test Report(see 11.1).4.Manufacture4.1 The steel shall be made by any of the followingprocesses:electric-furnace or basic-oxygen.4.2 The steel may be cast by a continuous process,or iningots.4.3 The heads and threads of the spikes may be formed byhot-or cold-forming methods.5.Mechanical Requirements5.1 Tensile Requirements:5.1.1 The material as represented by a tension test of afull-size finished spike,or a specimen machined from afinished spike,shall conform to the requirements prescribed inTable 1.5.1.2 Tension tests of full-size spikes shall be performedusing a 10 wedge as described in Test Methods A370,Supplement S11.1.5.5.1.3 Where the design of the spike is such that full-sizetesting is impracticable,the tension test may be made on aspecimen machined from a finished spike.Dimensions of thetest specimen shall conform to the requirements of TestMethods A370.5.1.4 When a machined specimen test is performed,theelongation requirement prescribed in Table 1 shall apply.If ascrew spike is machined and the specimen is tested andreported.the elongation meets or exceeds 18%,the bend testis not required.See 5.2.5.1.5 The yield point shall be determined by the drop of thebeam or halt in the gage of the testing machine.5.2 Bend RequirementThe body of a full-size finishedspike shall withstand the bend test described in Table 2 withoutcracking on the outside of the bent portion.6.Dimensions and Permissible Variations6.1 The finished spikes shall conform to the dimensionsspecified by the purchaser,subject to the permissible variationsprescribed in Table 3.6.2 The threads shall be sharp and true to gage and of thedesign specified by the purchaser.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.01 on Steel Rails and Accessories.Current edition approved April 1,2013.Published May 2013.Originallyapproved in 1916.Last previous edition approved in 2007 as A66 07.DOI:10.1520/A0066-07R13.2For 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.3Consult manufacturers literature for design details forA,B,and C-style heads.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);7.Workmanship,Finish,and Appearance7.1 The head of the finished spikes shall be concentric withand firmly joined to the body.7.2 The material shall be free of injurious imperfections andshall have a workmanlike finish.8.Number of Tests and Retests8.1 One tension test and one bend test shall be made fromeach lot of 100 kegs or fraction thereof.8.2 If the percentage of elongation of a machined tensiontest specimen is less than that specified in Table 1 and any partof the fracture is more than34in.(19 mm)from the center ofthe gage length,as indicated by scribe scratches marked on thespecimen before testing,a retest shall be allowed.8.3 If,during the tension or bend tests,a previously undis-covered material or manufacturing flaw should be disclosedthat interferes with the test or the interpretatio