1、Designation:A68997(Reapproved 2013)1Standard Specification forCarbon and Alloy Steel Bars for Springs1This standard is issued under the fixed designation A689;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorial changes were made to Sections 1.2,4.1 and throughout in July 2013.1.Scope1.1 This specification covers hot-wrought steel bars to beus
3、ed for the manufacture of general-purpose springs such ascoil,torsion,and leaf.1.2 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.2.Refer
4、enced Documents2.1 ASTM Standards:2A29/A29M Specification for Steel Bars,Carbon and Alloy,Hot-Wrought,General Requirements forA255 Test Methods for Determining Hardenability of SteelA304 Specification for Carbon and Alloy Steel Bars Subjectto End-Quench Hardenability RequirementsA322 Specification f
5、or Steel Bars,Alloy,Standard GradesA576 Specification for Steel Bars,Carbon,Hot-Wrought,Special QualityE112 Test Methods for Determining Average Grain Size3.Ordering Information3.1 Purchase orders for material to this specification shallinclude the following information as required to describe thede
6、sired material adequately:3.1.1 ASTM designation A689,3.1.2 ASTM grade number indicating the chemical compo-sition(see 5.1),special chemistry required(see 5.2),orhardenability(see 5.3),3.1.3 Quantity(number of bars or weight),3.1.4 Cross section description and dimensions or drawingsof section,3.1.5
7、 Bar lengths,3.1.6 When purchasers processing requires cold shearing,cold punching,and cold trimming,this should be noted.3.1.7 When special straightness or machine-cut lengths arerequired,reference on the purchase order should be made toTables A1.10 and A1.9 or Tables A2.10 and A2.9 for SI unitsof
8、Specification A29/A29M,and3.1.8 Weight limitations per shipping bundle.4.Melting Practice4.1 The steel shall be made by one or more of the followingprimary processes:basic-oxygen or electric-furnace.The pri-mary melting may incorporate separate degassing or refiningand may be followed by secondary m
9、elting using electroslagremelting or vacuum arc remelting.Where secondary meltingis employed,the heat shall be defined as all of the ingotsremelted from a single primary heat.5.Chemical Composition or Hardenability Requirements5.1 When the steel is specified by chemical composition,thestandard steel
10、 grades are the ASTM series 1000,4100,5100,6100,8600,and 9200,and those including BoronASTM series10B00,15B00,50B00,and 51B00.The specific grades arelisted in Specifications A322 and A576.5.2 Modifications may be made in the chemistry of thestandard ASTM grades to suit the hardenability required for
11、 aparticular bar size,spring shape,or other special requirements.The steel supplier should be consulted on availability of anyspecial chemical compositions.5.2.1 A chemical analysis of each heat of steel purchasedunder 5.1 and 5.2 shall be made by the steel producer todetermine the percentage of the
12、 elements,which percentagesshall conform to the requirements of the designated ASTMgrade or special chemistry.The chemical analysis thus deter-mined shall be reported to the purchaser.5.3 When the steel is specified by end-quench hardenabilityrequirements(alloy steels),the grade is identified by the
13、 suffixletter“H.”The standard alloy steel grades are theASTM series4100H,5100H,6100H,8600H,and 9200H and those includingBoronASTM series 50B00H and 51B00H.The specific gradesare listed in Specification A304.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel
14、and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved April 1,2013.Published July 2013.Originallyapproved in 1974.Last previous edition approved in 2007 as A689 97(2007)1.DOI:10.1520/A0689-97R13E01.2For referenced ASTM standards,visit the ASTM web
15、site,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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3.1
16、 Hardenability requirements(band limits)shall beshown on the purchase order as outlined in the applicablesections of Specification A304.5.3.2 The end-quench hardenability tests from each heat ofsteel shall be made in accordance with Test Methods A255,with the exception that a cast hardenability test specimen maybe acceptable.The test results shall conform within thespecified limits and shall be reported to the purchaser.6.General Requirements6.1 The hot-wrought bars shall be furnished in the as-
