1、Designation: A 689 97 (Reapproved 2007)e1Standard Specification forCarbon and Alloy Steel Bars for Springs1This standard is issued under the fixed designation A 689; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTETable 1 editorially corrected in January 2008.1. Scope1.1 This specification covers hot-wrought steel bars to beused for the man
3、ufacture of general-purpose springs such ascoil, torsion, and leaf.1.2 The values stated in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 29/A 29M Specification for Steel Bars, Carbon andAlloy,Hot-Wrought, General Requirements forA 255 Test Methods f
4、or Determining Hardenability of SteelA 304 Specification for Carbon and Alloy Steel Bars Sub-ject to End-Quench Hardenability RequirementsA 322 Specification for Steel Bars, Alloy, Standard GradesA 576 Specification for Steel Bars, Carbon, Hot-Wrought,Special QualityE112 Test Methods for Determining
5、 Average Grain Size3. Ordering Information3.1 Purchase orders for material to this specification shallinclude the following information as required to describe thedesired material adequately:3.1.1 ASTM designation A 689,3.1.2 AISI grade number indicating the chemical composi-tion (see 5.1), special
6、chemistry required (see 5.2), or harden-ability (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 Bar lengths,3.1.6 When purchasers processing requires cold shearing,cold punching, and cold trimming, this should be noted.3.
7、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 Specification A 29/A 29M, and3.1.8 Weight limitations per shipping bundle.4. Melting Practice4.1 The steel shall be made by
8、 one or more of the followingprimary processes: open-hearth, basic-oxygen, or electric-furnace. The primary melting may incorporate separate degas-sing or refining and may be followed by secondary meltingusing electroslag remelting or vacuum arc remelting. Wheresecondary melting is employed, the hea
9、t shall be defined as allof the ingots remelted from a single primary heat.5. Chemical Composition or Hardenability Requirements5.1 When the steel is specified by chemical composition, thestandard steel grades are the AISI series 1000, 4100, 5100,6100, 8600, and 9200, and those including Boron AISI
10、series10B00, 15B00, 50B00, and 51B00. The specific grades arelisted in Specifications A 322 and A 576.5.2 Modifications may be made in the chemistry of thestandard AISI grades to suit the hardenability required for aparticular bar size, spring shape, or other special requirements.The steel supplier
11、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 elements, which percentagesshall conform to the requirements of the designated AISI
12、 gradeor special chemistry. The chemical analysis thus determinedshall be reported to the purchaser.5.3 When the steel is specified by end-quench hardenabilityrequirements (alloy steels), the grade is identified by the suffixletter “H.” The standard alloy steel grades are the AISI series4100H, 5100H
13、, 6100H, 8600H, and 9200H and those includingBoron AISI series 50B00H and 51B00H. The specific gradesare listed in Specification A 304.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.1
14、5 on Bars.Current edition approved Sept. 1, 2007. Published January 2008. Originallyapproved in 1974. Last previous edition approved in 2002 as A 689 97 (2002).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
15、 ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.3.1 Hardenability requirements (band limits) shall beshown on the purchase order as
16、outlined in the applicablesections of Specification A 304.5.3.2 The end-quench hardenability tests from each heat ofsteel shall be made in accordance with Test Methods A 255,with the exception that a cast hardenability test specimen maybe acceptable. The test results shall conform within thespecifie
17、d limits and shall be reported to the purchaser.6. General Requirements6.1 The hot-wrought bars shall be furnished in the as-wrought condition and shall conform to the general require-ments as outlined in Specification A 29/A 29M, excepting thatthe spring steel bars shall not be marked by hot- or co
18、ld-stamping unless specified by the purchaser.6.2 Flat bars for leaf springs unless otherwise specified shallbe round-edge flat steel having two flat surfaces and two round(convex) edges. The cross section tolerances permit the two flatsurfaces to be slightly concave. When there is concavity, therad
19、ii of the arcs of the two concave surfaces shall be approxi-mately the same length.6.2.1 The round edges shall approximate circular arcs witha radius of curvature between 65 to 85 % of the thickness of thebar.6.2.2 Round-edge flat bars shall conform to the crosssection tolerances specified in Table
20、2.6.3 Flat (Rectangular and Including Square) Bars withRounded Corners:6.3.1 The rounded corner radii shall be in accordance withTable 1.6.3.2 For section tolerances see Table A1.3 or A2.3 for SIunits (for rectangular bars) and Table A1.1 or A2.1 for SI units(for square bars) of Specification A 29/A
21、 29M.6.4 Round BarsFor section tolerances see Table A1.1 orA2.1 for SI units of Specification A 29/A 29M.6.5 Special Cross Section Shapes, such as KeystoneAdrawing of the cross section including the tolerances shouldaccompany the purchase order. It is recommended that the steelsupplier be contacted
22、concerning the availability of any specialcross section.6.6 Length and Straightness of Bars:6.6.1 For straightness and length tolerances, see TablesA1.10 and A1.8, or Tables A2.10 and A2.8 for SI units ofSpecification A 29/A 29M.6.6.2 When special straightness or machine-cut length arerequired, this
23、 must be clearly noted on the purchase order andreference made to Tables A1.10 and A1.9 or Tables A2.10 andA2.9 for SI units of Specification A 29/A 29M.6.7 The austenitic grain size shall be No. 5 or finer asdetermined by Test Methods E112.7. Workmanship, Finish, and Appearance7.1 The bars shall be
24、 free of injurious defects and shall havea workmanlike finish consistent with good hot-rolling practicesfor bars intended for use in springs.8. Rejection and Rehearing8.1 Steel that fails to conform to the requirements of thisspecification or shows injurious defects after its receipt by thepurchaser
25、, or both, shall be rejected and the supplier shall benotified for disposition.9. Product Marking9.1 The bars shall be properly bundled for shipment andidentified as to size, weight, heat number, grade designation,purchase order number, and name of supplier.TABLE 1 Rounded Corner RadiiSpecified Size
26、s,Ain. (mm)Nominal Corner Radii,in. (mm)0.250 (6.35) to 0.375 (9.52) 0.031 (0.78)0.375 (9.52) to 0.500 (12.70) 0.063 (1.60)Over 0.500 (12.70) to 0.813 (20.65) 0.094 (2.38)Over 0.813 (20.65) to 1.469 (37.31) 0.125 (3.18)Over 1.469 (37.31) to 1.938 (49.23) 0.250 (6.35)Over 1.938 (49.23) to 2.438 (61.9
27、3) 0.313 (7.94)ASizes are distances between opposite sides of square bars and the thicknessof rectangular bars.A 689 97 (2007)e12TABLE2CrossSectionTolerancesforRound-EdgeFlatBarsSpecifiedWidth,in.(mm)ToleranceinWidth,in.(mm)ToleranceAinThickness,in.(mm)ToleranceinConcavityBofFlatSurfaces,in.(mm)MaxD
28、ifferenceinThickness,Cin.(mm)OverToandincludingMinus0.0000.375(9.52)orUnderOver0.375(9.52)to0.875(22.22),inclOver0.875(22.22)to1.500(38.10),incl0.375(9.52)orUnderOver0.375(9.52)to0.875(22.22),inclOver0.875(22.22)to1.500(38.10),incl0.375(9.52)orUnderOver0.375(9.52)to0.875(22.22),inclOver0.875(22.22)t
29、o1.500(38.10),incl0.002.50(63.5)+0.030(0.76)60.005(0.13)60.006(0.15).0.005(0.13)0.006(0.15).0.002(0.05)0.002(0.05).2.50(63.5)4.00(101.6)+0.045(1.14)60.006(0.15)60.008(0.20)60.012(0.30)0.006(0.15)0.008(0.20)0.012(0.30)0.003(0.07)0.004(0.10)0.006(0.15)4.00(101.6)5.00(127.0)+0.065(1.65)60.007(0.18)60.0
30、10(0.25)60.016(0.40)00.007(0.18)0.010(0.25)0.016(0.40)0.004(0.10)0.005(0.13)0.008(0.20)5.00(127.0)6.00(152.4)+0.090(2.28).60.012(0.30)60.020(0.51).0.012(0.30)0.020(0.51).0.006(0.15)0.010(0.25)AThicknessmeasurementsaretakenattheedgesofthebarwheretheflatsurfacesintersecttheroundededges.BConcavityisthe
31、differencebetweenthethicknessatthecenterofthebarandthethicknessattheedges.Thethicknessatthecentershouldnotexceedthethicknessattheedges.CMaximumdifferenceinthicknessbetweenthetwoedgesofeachbar.A 689 97 (2007)e13ASTM International takes no position respecting the validity of any patent rights asserted
32、 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
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34、areful 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 Internati
35、onal, 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 website(www.astm.org).A 689 97 (2007)e14
