1、Designation:A551/A551M08(Reapproved 2013)Standard Specification forCarbon Steel Tires for Railway and Rapid TransitApplications1This standard is issued under the fixed designation A551/A551M;the number immediately following the designation indicates the yearof original adoption or,in the case of rev
2、ision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers seven classes of carbon steeltires for railway and rapid transit use.1.1.1 Cla
3、ss AFor untreated driving tires for locomotivesin passenger service.1.1.2 Class AHTFor heat-treated driving tires for locomo-tives in passenger service.1.1.3 Class BFor untreated driving tires for freight loco-motives and tires for locomotive-truck,tender-truck,trailer andcar wheels,and miscellaneou
4、s service.1.1.4 Class BHTFor heat-treated driving tires for freightlocomotives and tires for trailer wheels.1.1.5 Class CFor untreated tires for switching locomo-tives.1.1.6 Class CHTFor heat-treated driving tires and switch-ing locomotives and tires for locomotive-trucks,tender-trucks,trailer and c
5、ar wheels,and miscellaneous service.1.1.7 Class DHTFor heat-treated driving tires for locomo-tives with light braking conditions,heavily loaded trailer tires,and rapid transit wheels where off-tread brakes are employed.1.2 Supplementary requirements,including those in thegeneral requirements of Spec
6、ification A788/A788M,are pro-vided for use when additional testing or inspection is desired.These shall apply only when specified individually by thepurchaser in the order.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text andtables
7、the SI units are shown in brackets.The values stated ineach system may not be exact equivalents;therefore eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.4 Unless the order specifies the applicable“M”specifica-t
8、ion designation,the tires shall be furnished to the inch-poundunits.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA788/A788M Specification for Steel Forgings,General Re-quirements2.2 AAR Standard:AAR M-107/M-208 Wheels,Carbon Steel
9、33.Ordering Information and General Requirements3.1 Material supplied to this specification shall conform tothe requirements of Specification A788/A788M,which out-lines ordering information,manufacturing requirements,test-ingandretestingmethodsandprocedures,marking,certification,product analysis var
10、iations,and additional supple-mentary requirements.3.1.1 If the requirements of this specification are in conflictwith those of Specification A788/A788M,then the require-ments of this specification shall prevail.3.2 In addition to the ordering requirements from Specifi-cation A788/A788M,the followin
11、g details should be supplied:3.2.1 Full identification of tread and flange contour withdimensional drawings as required,3.2.2 Inside diameter to be rough machined or finished,3.2.3 Intended service,and3.2.4 Chemical composition requirements,if different fromthose given in Table 1.4.Chemical Requirem
12、ents4.1 Chemical CompositionThe steel shall conform to therequirements for chemical composition specified in Table 1,unless otherwise required by the purchaser(see 3.2.4).1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct
13、 responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1965 to replace Specifications A26 and A329.Last previous editionapproved in 2008 as A551/A551M 08.DOI:10.1520/A0551_A0551M-08R13.2For referenced ASTM
14、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.3Available from Association of American Railroads(AAR),425 Third St.,SW,Washington,DC 2
15、0024,http:/www.aar.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.1 The purchaser may use the product analysis provisionsof Specification A788/A788M for tires produced to the require-ments of Table 1.By agreement with the manufac
16、turer,theseprovisions may be used also when the provisions of 3.2.4apply.5.Manufacture5.1 DiscardSufficient discard shall be made from eachingot to assure freedom from piping and undue segregation.5.2 Post Forge CoolingAll tires,immediately after beingrolled,shall be slow cooled in a manner to accomplish propertransformation without damage.5.3 Heat Treatment:5.3.1 Classes AHT,BHT,CHT,and DHT shall be heated toand held at the proper temperature for a sufficient time to effectthe desired transform