1、Designation:A877/A877M17Standard Specification forSteel Wire,Chromium-Silicon Alloys,Chrome-Silicon-Vanadium Alloy Valve Spring Quality1This standard is issued under the fixed designation A877/A877M;the number immediately following the designation indicates the yearof original adoption or,in the cas
2、e 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.1.Scope*1.1 This specification covers the highest quality of roundand shaped chromium-silicon and chromium-
3、silicon-vanadiumalloys of steel valve spring wire,uniform in quality and temper,intended for the manufacture of valve springs and other springsrequiring high-fatigue properties when used at moderatelyelevated temperatures.It is similar to the grade VD(referencedin EN 10270-2)intended for high fatigu
4、e levels.This wire shallbe either in the annealed and cold-drawn or quenched andtempered condition as specified by 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,ea
5、chsystem 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 Guide for Packaging,Marking,and Loading Method
6、sfor Steel Products for ShipmentA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE45 Test Methods for Determin
7、ing the Inclusion Content ofSteel2.2 European Standard:EN 10270-2 Steel Wire for Mechanical Springs Part 2:Oil-Hardened and Tempered Spring Steel Wire of Unal-loyed and Alloyed Steels.33.Ordering Information3.1 It shall be the responsibility of the purchaser to specifyall requirements that are neces
8、sary for material under thisspecification.Such requirements are permitted to include,butare not limited to the following:3.1.1 Quantity(mass),3.1.2 Name of material(chromium-silicon alloy steel valvespring quality wire),3.1.3 Dimensions(Table 1 and Section 8),3.1.4 Condition(Section 6),3.1.5 Packagi
9、ng(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:20 000-kgquenched and tempered chromium-silicon alloy steel valve spring qual
10、itywire,size 6.00 mm in 150-kg coils to A877/A877M dated _,or forinch-pound units,40 000-lb quenched and tempered chromium-siliconalloy steel valve spring quality wire,size 0.250 in.in 350-lb coils toA877/A877M dated _.4.Materials and Manufacture4.1 The steel shall be made by a steel making processc
11、ombined with secondary ladle refining that is capable ofsatisfying the inclusion content requirements of this specifica-tion.4.2 The steel shall be continuously cast into blooms androlled into billets.4.3 Billet conditioning shall precede wire rod manufacture.The resulting wire rods shall be of suff
12、icient surface qualitythat when combined with a surface removal operation per-formed prior to or during the wire manufacturing operation theresulting wire shall satisfy the surface condition and decarbur-ization requirements of this specification.4.4 The finished wire shall be free from detrimental
13、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 March 15,2017.Published March 2017.Originallyapproved in 198
14、7.Last previous edition approved in 2016 as A877/A877M 16.DOI:10.1520/A0877_A0877M-17.2For 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
15、 onthe ASTM website.3Available from European Committee for Standardization,Rue de Stassart 36,B-1050 Brussels,Belgium.*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 inte
16、rnational 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 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 de
