1、Designation: A 689 97 (Reapproved 2002)Standard 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 re
2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers hot-wrought steel bars to beused for the manufacture of general-purpose springs such ascoil, torsi
3、on, and leaf.1.2 The values stated in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:A 29/A 29M Specification for Steel Bars, Carbon andAlloy,Hot-Wrought and Cold-Finished, General Requirementsfor2A 255 Test Method for End-Quench Test for Hardenabilityof
4、 Steel2A 304 Specification for Carbon and Alloy Steel Bars, Sub-ject to End-Quench Hardenability Requirements2A 322 Specification for Steel Bars, Alloy, Standard Grades2A 576 Specification for Steel Bars, Carbon, Hot-Wrought,Special Quality2E112 Test Methods for Determining the Average GrainSize33.
5、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 chemistry required (se
6、e 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.3.1.7 When special strai
7、ghtness 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 one or more of the fo
8、llowingprimary 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 heat shall be defined as
9、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 series10B00, 15B00, 50
10、B00, 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 should be consulted on
11、 availability of anyspecial chemical compositions.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved Sept. 10, 2002. Published October 1997. Originally
12、published as A 689 74. Last previous edition A 689 81a(1993)e2.2Annual Book of ASTM Standards, Vol 01.05.3Annual Book of ASTM Standards, Vol 03.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.1 A chemical analysis of each heat
13、 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 gradeor special chemistry. The chemical analysis thus determinedshall be reported to the purchaser.5.3 When t
14、he 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, 6100H, 8600H, and 9200H and those includingBoron AISI series 50B00H and 51B00H. The specific gradesare liste
15、d in Specification A 304.5.3.1 Hardenability requirements (band limits) shall beshown on the purchase order as 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 Method A 255,with the excepti
16、on 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-wrought condition and shall conform to the general require-ments
17、as outlined in Specification A 29/A 29M, excepting thatthe spring steel bars shall not be marked by hot- or cold-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. Th
18、e cross section tolerances permit the two flatsurfaces to be slightly concave. When there is concavity, theradii 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 t
19、hickness of thebar.6.2.2 Round-edge flat bars shall conform to the crosssection tolerances specified in Table 1.6.3 Flat (Rectangular and Including Square) Bars withRounded Corners:6.3.1 The rounded corner radii shall be in accordance withTable 2.6.3.2 For section tolerances see Table A1.3 or A2.3 f
20、or SIunits (for rectangular bars) and Table A1.1 or A2.1 for SI units(for square bars) of Specification A 29/A 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 inclu
21、ding the tolerances shouldaccompany the purchase order. It is recommended that the steelsupplier be contacted 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 f
22、or SI units ofSpecification A 29/A 29M.6.6.2 When special straightness or machine-cut length arerequired, this 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 b
23、e No. 5 or finer asdetermined by Test Methods E112.7. Workmanship, Finish, and Appearance7.1 The bars shall be 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
24、 conform to the requirements of thisspecification or shows injurious defects after its receipt by thepurchaser, 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 nu
25、mber, grade designation,purchase order number, and name of supplier.A 689 97 (2002)2TABLE1CrossSectionTolerancesforRound-EdgeFlatBarsSpecifiedWidth,in.(mm)ToleranceinWidth,in.(mm)ToleranceAinThickness,in.(mm)ToleranceinConcavityBofFlatSurfaces,in.(mm)MaxDifferenceinThickness,Cin.(mm)OverToandincludi
26、ngMinus0.0000.375(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)to1.500(38.10),incl0.002.50(63.5)+0.030(0.76)6
27、0.005(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)60.010(0.25)60.016(0.40)00.007(0.18)0.010(0.25)0.
28、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.BConcavityisthedifferencebetweenthethicknessatthecenterofthe
29、barandthethicknessattheedges.Thethicknessatthecentershouldnotexceedthethicknessattheedges.CMaximumdifferenceinthicknessbetweenthetwoedgesofeachbar.A 689 97 (2002)3ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s
30、tandard. 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 responsible technical committee and must be re
31、viewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of therespons
32、ible 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 International, 100 Barr Harbor Drive, PO Box C700, West
33、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).TABLE 2 Rounded Co
34、rner RadiiSpecified Sizes,Ain. (mm)Nominal Corner Radii,in. (mm)0.250 (6.35) to 0.375 (9.92) 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 (61.93) 0.313 (7.94)ASizes are distances between opposite sides of square bars and the thicknessof rectangular bars.A 689 97 (2002)4
