Designation: A756 − 17Standard Specif i cation forStainless Anti-Friction Bearing Steel 1This standard is issued under the f i xed designation A756; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specif i cation covers the requirements forchromium-carbon bearing quality stainless steel to be used inthe 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 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 international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 2A484/A484M Specif i cation for General Requirements forStainless Steel Bars, Billets, and ForgingsA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE45 Test Methods for Determining the Inclusion Content ofSteelE381 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 Test Methods for Estimating the Depth of Decarbur-ization of Steel Specimens2.2 Other Standards:ISO 683 Part 17 Ball and Roller Bearing Steels 3SAE J418a Grain Size Determination of Steel 43. Ordering Information3.1 Orders for material under specif i cation should includethe following information:3.1.1 Quantity,3.1.2 Grade identif i cation,3.1.3 Specif i cation designation and year of issue,3.1.4 Dimensions, shape, and3.1.5 Supplementary Requirements, if desired.4. Process4.1 The steel shall be made by a process that is capable ofproviding a high-quality product meeting the requirements ofthis specif i cation.5. Chemical Composition5.1 Typical examples of chemical compositions are shownin Table 1. Other compositions may be specif i ed.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 requirements specif i ed in Table 1for the ordered grade or to requirements agreed upon betweenthe manufacturer and the 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 madein accordance with Specif i cation A484/A484M.6. Dimensions, Mass, and Permissible Variations6.1 The size and shape of the material shall be agreed uponbetween manufacturer and purchaser.6.2 Dimensional tolerances for hot-rolled or hot-rolled andannealed bars, in straight lengths or coils, and cold-f i nished1 This specif i cation 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 Sept. 1, 2017. Published October 2017. Originallyapproved in 1978. Last previous edition approved in 2014 as A756 – 09(2014) ?1 .DOI: 10.1520/A0756-17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.3 Available from International Organization for Standardization (ISO), ISOCentral Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,Geneva, Switzerland, http://www.iso.org.4 Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096, http://www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 Copyright by ASTM Int'l (all rights reserved); Fri Oct 6 22:56:41 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
