1、Designation:A231/A231M18Standard Specification forChromium-Vanadium Alloy Steel Spring Wire1This standard is issued under the fixed designation A231/A231M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A nu
2、mber 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 round and shaped chromium-va
3、nadium alloy steel spring wire having properties and qualityintended for the manufacture of springs used at moderatelyelevated temperatures.This wire shall be either in the annealedand cold-drawn or oil-tempered condition as specified by thepurchaser.1.2 The values stated in either SI units or inch-
4、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.1.2.1 Within the text,the inch-pound uni
5、ts are shown inbrackets.1.3 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 Organizati
6、on TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA510/A510M Specification for General Requirements forWire Rods and Coarse Round Wire,Carbon Steel,andAlloy SteelA700 Guide for Packaging,Mark
7、ing,and Loading Methodsfor Steel Products for ShipmentA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA941 Terminology Relating to Steel,Stainless Steel,RelatedAlloys,and FerroalloysE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE29 Practice for Usi
8、ng Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification,seeTerminology A941.3.2 Definitions of Terms Specific to This Standard:3.2.1 equivalent round diameter,ndiameter of a roundwire having
9、equivalent cross sectional area to a given shapedwire.3.2.2 round wire,nwire having a circular cross section.3.2.3 shape factor,nthis value is used to obtain crosssectional area for shaped wires when multiplied by measuredwidth and thickness.3.2.4 shaped wire,nwire having a non-circular crosssection
10、.4.Ordering Information4.1 It shall be the responsibility of the purchaser to specifyall requirements that are necessary for material under thisspecification.Such requirements may include,but are notlimited to,the following:4.1.1 Quantity(mass),4.1.2 Name of material(chromium-vanadium alloy steelwir
11、e),4.1.3 Wire diameter(Table 1 and Section 9),and4.1.4 ASTM designation and date of issue.4.2 The purchaser shall have the option to specify additionalrequirements,including but not limited to:4.2.1 Requirements for certifications,heat analysis or testreports(6.2 and Section 14),4.2.2 Special packin
12、g,marking,and loading requirements(Section 15),and4.2.3 Other special requirements,if any.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 appro
13、ved Sept.1,2018.Published September.Originallyapproved in 1939.Last previous edition approved in 2015 as A231/A231M 15.DOI:10.1520/A0231_A0231M-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards vo
14、lume information,refer to the standards Document Summary page onthe ASTM website.*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 a
15、ccordance 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 NOTE1A typical ordering descri
16、ption is as follows:20 000 kgoil-tempered chromium-vanadium alloy steel wire,size 6.00 mm in150-kg coils to ASTM A231/A231M dated_,or for inch-poundunits,40 000 lb oil-tempered chromium-vanadium alloy steel spring wire,size 0.250 in.in 350-lb coils to ASTM A231/A231M dated_.5.Materials and Manufacture5.1 The steel may be made by any commercially acceptedsteelmaking process.The steel may be either ingot cast orstrand cast.5.2 The finished wire shall be free from detrimental pipeand undue segregat
