1、Designation:A295/A295M14Standard Specification forHigh-Carbon Anti-Friction Bearing Steel1This standard is issued under the fixed designation A295/A295M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A numb
2、er in parentheses indicates the year of last reapproval.A superscript epsilon()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.Scope*1.1 This specification covers high-carbon bearing-qualityste
3、el to be used in the manufacture of anti-friction bearings.1.2 Supplementary requirements of an optional nature areprovided and when desired shall be so stated in the order.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach
4、system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.2.Referenced Documents2.1 ASTM Standards:2A29/A29M Specification for General Requirements for SteelBars,Carbon and All
5、oy,Hot-WroughtA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA892 Guide for Defining and Rating the Microstructure ofHigh Carbon Bearing SteelsE45 Test Methods for Determining the Inclusion
6、Content ofSteelE112 Test Methods for Determining Average Grain SizeE381 Method of Macroetch Testing Steel Bars,Billets,Blooms,and ForgingsE1019 Test Methods for Determination of Carbon,Sulfur,Nitrogen,and Oxygen in Steel,Iron,Nickel,and CobaltAlloys by Various Combustion and Fusion TechniquesE1077 T
7、est Methods for Estimating the Depth of Decarbur-ization of Steel Specimens2.2 ISO Document:3ISO 683,Part 17 Ball and Roller Bearing Steels3.Ordering Information3.1 Orders for material under this specification shouldinclude the following information:3.1.1 Quantity,3.1.2 Grade identification,3.1.3 Sp
8、ecification designation and year of issue,3.1.4 Dimensions,and3.1.5 Supplementary requirements,if included.4.Process4.1 The steel shall be made by a process that is capable ofproviding a high quality product meeting the requirements ofthis specification.5.Chemical Composition and Analysis5.1 Typical
9、 examples of chemical compositions are shownin Table 1.Other compositions may be specified.5.2 An analysis of each heat of steel shall be made by thesteel manufacturer in accordance with Test Methods,Practices,and Terminology A751.The chemical composition thus deter-mined shall conform to the requir
10、ements specified in Table 1for the ordered grade or to other requirements agreed uponbetween manufacturer and purchaser.5.3 Product analysis may be made by the purchaser inaccordance with Test Methods,Practices,and TerminologyA751.Permissible variations in product analysis shall be inaccordance with
11、 Specification A29/A29M.6.Sizes,Shapes,and Dimensional Tolerances6.1 The physical size and shape of the material shall beagreed upon between manufacturer and purchaser.6.2 Dimensional tolerances for hot-rolled or hot-rolled andannealed bars,in straight lengths or coils,and cold-finishedbars 0.500 in
12、.12.5 mm and larger in diameter furnished under1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.28 on Bearing Steels.Current edition approved Oct.1,2014.Published November 2014.Original
13、lyapproved in 1946.Last previous edition approved in 2009 as A295/A295M 09.DOI:10.1520/A0295_A0295M-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 Docu
14、ment Summary page onthe ASTM website.3Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO
15、Box C700,West Conshohocken,PA 19428-2959.United States1 this specification shall conform to the requirements specified inthe latest edition of Specification A29/A29M.6.3 Dimensional tolerances for cold-finished coils for balland roller material shall be as shown in Table 2.6.4 Coil tolerances also a
16、pply to cold-finished straightlengths under 0.500 in.12.5 mm in diameter.7.Quality Tests7.1 The supplier shall be held responsible for the quality ofthe material furnished and shall make the necessary tests toensure this quality.The supplier shall be required to reportresults of the micro-inclusion rating tests detailed below.Quality tests shown in 7.2 and 7.3 are based upon proceduresestablished in Test Methods E45.7.2 SamplingSamples taken in accordance with the fol-lowing paragraphs shall be
