ASTM_A_232_-_A_232M_-_05_2011e1.pdf

Designation:A232/A232M05(Reapproved 2011)1Standard Specification forChromium-Vanadium Alloy Steel Valve Spring Quality Wire1This standard is issued under the fixed designation A232/A232M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,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.This standard has been approved for use by agencies of the Department of Defense.1NOTEUnits were re-ordered editorially throughout in July 2011.1.Scope*1.1 This specification covers the highest quality of roundchromium-vanadium alloy steel valve spring wire,uniform inquality and temper,intended for the manufacture of valvesprings and other springs requiring high-fatigue propertieswhen used at moderately elevated temperatures.This wire shallbe either in the annealed and cold-drawn or oil-temperedcondition as specified by the purchaser.1.2 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 Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for ShipmentA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 ANSI Standard:3B 32.4 Preferred Metric Sizes for Round,Square,Rectangle,and Hexagon Metal Products2.3 Federal Standard:4Fed.Std.No.123 Marking for Shipment(Civil Agencies)2.4 Military Standard:4MIL-STD-163 Steel Mill Products,Preparation for Ship-ment and Storage2.5 AIAG Standard:5AIAG B-5 02.00 Primary Metals Identification Tag Applica-tion Standard3.Ordering Information3.1 Orders for material under this specification shouldinclude the following information for each ordered item:3.1.1 Quantity(mass),3.1.2 Name of material(chromium-vanadium alloy steelvalve spring quality wire),3.1.3 Dimensions(Table 1 and Section 8),3.1.4 Condition(Section 6),3.1.5 Packaging(Section 14),3.1.6 Heat analysis report,if requested(5.2),3.1.7 Certification or test report,or both,if specified(Sec-tion 13),and3.1.8 ASTM designation and year of issue.NOTE1A typical ordering description is as follows:For inch-poundunits,40 000 lb oil-tempered chromium-vanadium alloy steel valve springquality wire,size 0.250 in.in 350-lb coils to ASTM A232/A232M dated_;or for SI units,20 000 kg oil-tempered chromium-vanadium alloysteel valve spring quality wire,size 6.00 mm in 150 kg coils to ASTMA232/A232M dated _.4.Materials and Manufacture4.1 The steel may be made by any commercially acceptedsteel making process.The steel shall be continuously cast.4.2 The finished wire shall be free from detrimental pipeand undue segregation.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.03 on Steel Rod and Wire.Current edition approved July 1,2011.Published July 2011.Originally approvedin 1939.Last previous edition approved in 2005 as A232/A232M 05.DOI:10.1520/A0232_A0232M-05R11E01.2For 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 Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098.5Available from Automotive Industry Action Group(AIAG),26200 Lahser Rd.,Suite 200,Southfield,MI 48034.*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 States1Copyright by ASTM Intl(all rights reserved);5.Chemical Composition5.1 The steel shall conform to the requirements for chemicalcomposition specified in Table 2.5.2 Heat AnalysisEach heat of steel shall be analyzed bythe manufacturer to determine the percentage of elementsprescribed in Table 2.This analysis shall be made from a testspecimen preferably taken during the pouring of the heat.When requested,this shall be reported to the purchaser andshall conform to the requirements of Table 2.5.3 Product AnalysisAn analysis may be made by thepurchaser from finished wire representing each heat of steel.The average of all the separate determinations made shall bewithin the limits specified in the analysis column.Individualdeterminations may vary to the extent shown in the