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ASTM A1089 - A 1089M - 14.pdf

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ASTM A1089 - A 1089M - 14.pdf

Designation A1089/A1089M − 14Standard Specification forHighly Loaded Anti-Friction Bearing Steel1This standard is issued under the fixed designation A1089/A1089M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers bars, billets, and blooms ofbearing-quality steel to be used in the manufacture of highlyloaded 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 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 Standards2A29/A29M Specification for General Requirements for SteelBars, Carbon and Alloy, Hot-WroughtA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE381 Method of Macroetch Testing Steel Bars, Billets,Blooms, and ForgingsE588 Practice for Detection of Large Inclusions in BearingQuality Steel by the Ultrasonic MethodE1019 Test Methods for Determination of Carbon, Sulfur,Nitrogen, and Oxygen in Steel, Iron, Nickel, and CobaltAlloys by Various Combustion and Fusion TechniquesE2283 Practice for Extreme Value Analysis of NonmetallicInclusions in Steel and Other Microstructural Features2.2 Other Document3ISO 4967 Steel–Determination of Content of NonmetallicInclusions–Micorgraphic Method Using Standard Dia-grams3. Ordering Information3.1 Orders for material under this specification shouldinclude the following information3.1.1 Quantity,3.1.2 Grade identification,3.1.3 Specification 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 basic oxygen or electricfurnace process, with vacuum degassing and suitableshrouding, that provides a high quality product meeting therequirements of this specification. The use of a vacuum-arcremelt or an electro-slag remelt process is not required but isnot excluded.5. Chemical Composition and Analysis5.1 The chemical composition shall be agreed upon betweenthe manufacturer and purchaser.5.2 All compositions shall meet the element maximums ofTable 1.5.3 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 specified.5.4 Product analysis may be made by the purchaser inaccordance with Test Methods, Practices, and TerminologyA751. Permissible variations in product analysis shall be inaccordance with 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 shall conform to the require-ments specified in Specification A29/A29M. For sizes andshapes not covered by Specification A29/A29M, dimensionaltolerances shall be agreed upon between manufacturer andpurchaser.7. Quality Tests7.1 The supplier shall be held responsible for the quality ofthe material furnished and shall make the necessary tests to1This 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 May 15, 2014. Published July 2014. DOI 10.1520/A1089_A1089M-142For 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 standard’s Document 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1ensure this quality. The supplier shall report results of themacroetch and micro-inclusion tests detailed below for eitherheat qualification or product qualification.7.2 SamplingSamples taken in accordance with the fol-lowing paragraphs shall be obtained from rolled or forgedsections. A minimum 3 to 1 reduction of rolled or forgedsections is required for all products.7.3 Heat Qualification Sampling7.3.1 For the qualification of an entire bottom poured heat,a minimum of six samples shall be examined and shallrepresent the top and bottom of three ingots. One ingot shall betaken at random from the first usable plate poured, one ingot atrandom from the usable plate poured nearest to the middle ofthe heat, and one ingot at random from the last usable platepoured. When two usable plates constitute a heat, two of thesample ingots shall be selected from the second usable platepoured. Where a single usable plate constitutes a heat, anythree random ingots may be selected. Other methods ofsampling shall be as agreed upon between manufacturer andpurchaser.7.3.2 For the qualification of an entire strand cast heat, aminimum of six samples representing the first, middle, and lastusable portion of the heat shall be examined. The first, middle,and last portion of at least one outer strand shall be tested andat least one sample from any usable portion of each remainingstrand shall be tested. Other methods of sampling shall be asagreed upon between manufacturer and purchaser.7.4 Product Qualification Sampling7.4.1 For qualification of material not subjected to heatqualification, bars rolled or forged to the same final productsize shall be randomly sampled. The number of samples shallbe proportional to the amount of the heat applied, but shall notbe less than two or more than ten.7.5 MacroetchSpecimens representative of the full crosssection of bars, billets, or blooms shall be macroetched andrated in accordance with Method E381 in hydrochloric acidand water 11 at a temperature of 160 to 180F [71 to 82C].Such specimens shall not exceed S1, R1, C2 of Method E381.Indications due to sulfur segregation commonly referred to asType A segregates are not to be included in the rating. Foringot cast material only, if the size and weight of the bars,billets, or blooms prevent the full cross section from beingmacroetched, an oversize quarter-section may be used as analternative. The quarter-section must meet the reduction re-quirement of 7.2 and contain both the surface and center of theoriginal cross section before reduction.7.6 Inclusion RatingThe specimens shall be approxi-mately 10 by 20 mm and shall be taken from an area halfwaybetween the center and outside of the bar, billet, or bloom. Thepolished face shall be longitudinal to the direction of rolling.The specimens shall be rated with Method A of ISO 4967.Fields with sizes or numbers of all types of inclusionsintermediate between configurations shown on the chart shallbe classified as the lesser of the rating number. The worst fieldof each inclusion type from each specimen shall be recorded asthe rating for the specimen. The average of all specimen ratingsshall not exceed the rating specified in Table 2.7.7 Inclusion SizeThe maximum stringer length and themaximum globular diameter shall not exceed the limits ofTable 3. These maximum values apply only to the qualificationprocedures described in this specification and cannot be usedon material in forms other than the supplied bar, billet, orbloom.8. Inspection8.1 The manufacturer shall afford the purchaser’s inspectorall reasonable facilities necessary to satisfy him that thematerial is being produced and furnished in accordance withthis specification. Mill inspection by the purchaser shall notinterfere unnecessarily with the manufacturer’s operations. Alltests and inspections shall be made at the place of manufacture,unless otherwise agreed to.9. Certification and Reports9.1 Upon request of the purchaser in the contract or order, amanufacturer’s certification that the material was manufacturedand tested in accordance with this specification, together witha report of the test results shall be furnished at the time ofshipment. Special requirements agreed to at the time ofpurchase shall be noted on the certification.10. Keywords10.1 anti-friction; bearing steel; nonmetallic inclusionsTABLE 1 Element MaximumsA,BPhosphorus Sulfur OxygenCAluminumDCopper Titanium Tin Arsenic Antimony Lead0.015 0.015 See footnote 0.050 0.30 0.0050 0.030 0.040 0.020 0.002AElements not agreed upon between the manufacturer and purchaser shall not be intentionally added to the steel.BIntentional additions of calcium or calcium alloys for deoxidation or inclusion shape control are not permitted unless specifically approved by the purchaser.COxygen content applies to product analysis and shall be determined in accordance with Test Methods E1019. A maximum average oxygen content of 0.0015 shall berequired for carburizing and induction hardening steels, and a maximum average content of 0.0010 shall be required for though hardening steels.DTotal aluminum content.TABLE 2 Average Inclusion RatingRating UnitsThin Series Heavy SeriesA2.5 A1.5B1.5 B1.0C0 C0D1.0 D1.0DS1.5A1089/A1089M − 142SUPPLEMENTARY REQUIREMENTSOne or more of the supplementary requirements described below apply when included in thepurchaser’s order or contract. When so included, a supplementary requirement shall have the sameforce as if it were in the body of the specification. Supplementary requirements’ details not fullydescribed shall be agreed upon between the purchaser and the supplier, but shall not negate any of therequirements in the body of the specification.S1. Detection of Large Inclusions by the UltrasonicMethodS1.1 For the process qualification of a manufacturer, thepurchaser may specify Practice E588. The limits shall be asagreed upon between manufacturer and purchaser. ThisSupplementary Requirement is not intended for the evaluationof material on a production basis.S2. Extreme Value Analysis of Nonmetallic InclusionsS2.1 For the process qualification of a manufacturer, thepurchaser may specify Practice E2283. The limits shall be asagreed upon between manufacturer and purchaser. ThisSupplementary Requirement is not intended for the evaluationof material on a production basis.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 phone, 610-832-9555 fax, or serviceastm.org e-mail; or through the ASTM websitewww.astm.org. Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel 978 646-2600; http//www.copyright.com/TABLE 3 Maximum Inclusion SizeStringer Length m Globular Diameter m710 52A1089/A1089M − 143

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