ASTM_A_2_-_02_2014.pdf

Designation:A202(Reapproved 2014)Standard Specification forCarbon Steel Girder Rails of Plain,Grooved,and GuardTypes1This standard is issued under the fixed designation A2;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 U.S.Department of Defense.1.Scope1.1 This specification covers carbon steel girder rails2ofthree classes based on type or type and weight,and chemistrydefined as follows and in Table 1.1.1.1 Unless otherwise specified by the purchaser,girder-guard rails shall be Class A.1.1.2 Plain and grooved-girder rails under 135 lb/yd(67.1kg/m)in weight shall be specified by the purchaser as eitherClass A or Class B.1.1.3 Plain and grooved-girder rails of 135 lb/yd in weightand heavier shall be Class C,unless otherwise specified.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.2.Referenced Documents2.1 ASTM Standards:3A700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for Shipment(Withdrawn 2014)4E10 Test Method for Brinell Hardness of Metallic Materials3.Classification of Rails3.1 No.1 RailsRails that are free of injurious imperfec-tions and flaws of all kinds.3.2 No.2 RailsRails that contain surface imperfections insuch number or of such character that shall not,in the judgmentof the inspector,render them unfit for recognized uses.4.Ordering Information4.1 Orders for girder rails under this specification shallinclude the following information as appropriate:4.1.1 ASTM designation and date of issue;4.1.2 Quantity(tons or pieces as appropriate);4.1.3 Complete identification of section with dimensionaldrawing if required;4.1.4 Arrangement of bolt holes,bond holes,and tie rodholes with dimensional drawings,if required;4.1.5 Class(in accordance with 1.1 and Table 1);and4.1.6 Certification and Test Report(see 12.1).5.Manufacture5.1 Melting PracticeThe steel shall be made by any of thefollowing processes:open-hearth,basic-oxygen,or electric-furnace.5.1.1 The steel may be cast by a continuous process or iningots.5.2 DiscardSufficient discard shall be made to securefreedom from injurious segregation and piping.6.Chemical Composition6.1 Heat or Cast AnalysisAn analysis for each heat or castof steel shall be made by the manufacturer to determine thepercentage of the elements specified in Table 1.The analysisshall be made from a test sample representing the heat or castand shall conform to the requirements in Table 1.6.2 Upon request by the purchaser,similar samples shall beprovided to verify the heat or cast analysis as determined in6.1.6.3 Product AnalysisWhen ladle tests are not available,finished material representing the heat may be product tested.The product analysis allowance beyond the limits of thespecified ladle analysis shall be within the limits for productanalyses specified in Table 2.7.Hardness Properties7.1 Test Specimens:7.1.1 Three representative sections of rail from each heatshall be selected as test specimens.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 March 1,2014.Published March 2014.Originallyapproved in 1912.Last previous edition approved in 2008 as A2 02(2008).DOI:10.1520/A0002-02R14.2Design details for carbon steel girder rails are indicated in the girder railcatalogs of individual manufacturers.3For 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.4The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);7.1.2 Excess scale and decarburization shall be removedfrom the test area of the head or web of the selected specimens.7.2 Procedure:7.2.1 The test shall be conducted in accordance with TestMethod E10.7.3 Requirements:7.3.1 Class A rail shall have a Brinell hardness of 248 to293,and Classes B and C shall have hardnesses of 269 to 321.7.4 RetestsIf the average depth of the impressions ob-tained on the head of the three specimens from any heat failsto conform to the requirements specified in 7.3,the manufac-turer may at his option retest the specimens,or each rail fromthat heat.Rails represented by retests which conform to therequirements of 7.3 shall be accepted.8.Permissible V