1、Designation: A3 01 (Reapproved 2012)Standard Specification forSteel Joint Bars, Low, Medium, and High Carbon (Non-Heat-Treated)1This standard is issued under the fixed designation A3; the number immediately following the designation indicates the year of originaladoption or, in the case of revision,
2、 the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification cover
3、s steel joint bars for connectingsteel rails in mine, industrial, and standard railroad track.1.2 Three grades of joint bars are defined for applicationswhere non-heat treated bars are suitable:1.2.1 Grade 1, low-carbon, primarily for industrial and mineuse.1.2.2 Grade 2, medium-carbon, primarily fo
4、r industrial andmine use.1.2.3 Grade 3, high-carbon, for general use in standardrailroad track. They may be used in the production of insulatedtrack joints.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units
5、 that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for Shipment3. Ordering Informatio
6、n3.1 Orders for joint bars under this specification shallinclude the following information as appropriate:3.1.1 Quantitynumber of pairs of bars,3.1.2 Typedesign or type bar along with section designa-tion and weight of rails being joined,3.1.3 Gradein accordance with 1.2 and Table 1 and Table2,3.1.4
7、 Dimensionoverall length,3.1.5 Punchingtype (elliptical, oval, round, or combina-tions), size, number, location, spacing, and elevation ofpunched holes, with dimensional drawing if necessary,3.1.6 Special Requirementsnotching, shearing, bundling,etc., including details, and3.1.7 Certification and Te
8、st Report Requirements(Section11).4. Manufacture4.1 The steel shall be made by one or both of the followingprocesses: basic-oxygen or electric-furnace.4.1.1 The steel may be cast by a continuous process, or iningots.4.2 Grade 2, medium-carbon, joint bars may be punched,slotted, and shaped in the cas
9、e of special designs, either hot orcold. Joint bars that are punched, slotted, or shaped cold shallbe subsequently annealed.4.3 Grade 3, high-carbon, joint bars shall be uniformlyheated for punching, slotting, and shaping.5. Chemical Requirements5.1 The steel shall conform to the requirements as toc
10、hemical composition prescribed in Table 1.5.2 Heat or Cast AnalysisAn analysis of each heat or castshall be made by the manufacturer to determine the percent-ages of carbon, manganese, phosphorus, and sulfur. The1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless S
11、teel and Related Alloys and is the direct responsibility of SubcommitteeA01.01 on Steel Rails and Accessories.Current edition approved March 1, 2012. Published March 2012. Originallyapproved in 1901. Last previous edition approved in 2006 as A3 01 (2006). DOI:10.1520/A0003-01R12.2For referenced ASTM
12、 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 onthe ASTM website.TABLE 1 Chemical RequirementsElements Composition, %Grade 1 Grade 2 Grade 3Carbon
13、, min . 0.30 0.45Phosphorus, max 0.05 0.05 0.04TABLE 2 Product AnalysisAllowance Beyond Limits of Specified ChemicalAnalysisPercent undermin limitPercent overmax limitCarbon 0.04 0.04Phosphorus . . . 0.0081Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-
14、2959, United States.analysis shall be made from a test sample taken preferablyduring the pouring of the heat or cast. The chemical composi-tion thus determined shall conform to the requirement in Table1. Manganese and sulfur determinations are for informationonly.5.3 Product AnalysisWhen ladle tests
15、 are not available,finished material representing the heat may be product tested.The product analysis allowance beyond the limits of thespecified ladle analysis shall be within the limits for productanalyses specified in Table 2.5.3.1 An analysis may be made by the purchaser from asample taken from
16、a finished joint bar representing each heat orcast. The chemical composition thus determined shall conformto the requirements in Table 1.6. Tensile Requirements6.1 PropertiesThe material as represented by a tensiontest specimen shall conform to the tensile properties prescribedin Table 3.6.2 Test Sp
17、ecimenThe tension test specimen shall betaken from the middle of the head at the center of a finishedjoint bar. The specimen shall be machined to the form anddimensions for a standard round tension test specimen with2-in. or (50-mm) gage length, as described in Test Methods andDefinitions A370.6.3 N
18、umber of TestsOne tension test shall be made fromeach heat or cast of steel.6.4 RetestsIf the results of the tension test fail to meet therequirements specified, a retest shall be permitted on tworandom specimens from the lot. Both shall conform to therequirements specified in Table 3.6.4.1 If any t
19、est specimen fails because of mechanicalreasons such as failure of testing equipment or improperspecimen preparation, it may be discarded and another speci-men taken.7. Dimensions and Permissible Variations7.1 The joint bars shall be true to template, and shallaccurately fit the rails for which they
20、 are intended.7.2 The joint bars shall be either sheared or sawed to length,punched to the dimensions specified by the purchaser andalignment adjusted, all subject to the permissible variationsprescribed in 7.3, 7.4, and Table 4.7.3 Any variation from a straight line in a vertical planeshall be such
21、 as will make the bars high in the center.7.4 For girder rail applications only, any variation from astraight line in a horizontal plane shall be such as will make thebars convex towards the web of the rail.8. Workmanship, Finish, and Appearance8.1 The joint bars shall be straight, subject to the va
22、riationsprescribed in 7.3, 7.4, and Table 4.8.2 The general appearance with respect to soundness andsurface finish shall be consistent with good commercial prac-tice as determined by visual inspection.9. Inspection9.1 The manufacturer shall afford the purchasers inspectorall reasonable facilities ne
23、cessary to satisfy that the material isbeing produced and furnished in accordance with this specifi-cation. Mill inspection by the purchaser shall not interfereunnecessarily with the manufacturers operations. All tests andinspections shall be made at the place of manufacture, unlessotherwise agreed
24、upon.10. Rejection and Rehearing10.1 Material that fails to conform to the requirements ofthis specification may be rejected. Rejections shall be reportedto the manufacturer or supplier promptly and in writing. In caseof dissatisfaction with the test results, the manufacturer orsupplier may make cla
25、im for a rehearing.11. Certification and Test Report11.1 When specified in the purchase order or contract, amanufacturers certification shall be furnished to the purchaserthat the material was produced and tested in accordance withthis specification and has been found to meet the requirements.11.2 W
26、hen specified in the purchase order or contract, areport of the chemical and mechanical test results shall befurnished.11.3 A Material Test Report, Certificate of Inspection, orsimilar document printed from or used in electronic form froman electronic data interchange (EDI) transmission shall berega
27、rded as having the same validity as a counterpart printed inthe certifiers facility. The content of the EDI transmitteddocument must meet the requirements of the invoked ASTMstandard(s) and conform to any existing EDI agreement be-tween the purchaser and the supplier.11.4 Notwithstanding the absence
28、 of a signature, the orga-nization submitting either a printed document (Material TestReport, Certificate of Inspection or similar document) or anEDI transmission is responsible for the content of the report.12. Product Marking12.1 The name or brand of the manufacturer and the year ofmanufacture sha
29、ll be rolled in raised letters and figures on theside of the rolled bars, and a portion of this marking shallappear on each finished joint bar.12.2 In addition to the markings in 12.1, the followingmarkings shall appear on Grade 3, high-carbon joint bars:12.2.1 The section designation shall be inclu
30、ded with therolled raised characters.12.2.2 A serial number representing the heat or cast shall behot-stamped on the outside of the web of each bar, near oneend.12.3 Bar Coding:12.3.1 The Automotive Industry Action Group (AIAG) BarCode Standard for Primary Metals for Steel Products may beTABLE 3 Ten
31、sile RequirementsGrade 1 Grade 2 Grade 3ksi MPa ksi MPa ksi MPaTensile strength,min55 380 68 470 85 585Elongation in 2 in.or 50 mm, min22 20 15A3 01 (2012)2considered as a possible auxiliary method of identification. Useof this method shall be by agreement between purchaser andsupplier.13. U.S. Gove
32、rnment Procurement13.1 When specified in the contract or purchase order,material shall be prepared for shipment and storage in accor-dance with the requirements of Practices A700.14. Keywords14.1 rail; railway applications; steel joint barsASTM International takes no position respecting the validity
33、 of any patent rights asserted 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
34、to revision at any time by the responsible technical committee and must be reviewed 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
35、. Your comments will receive careful 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
36、 copyrighted by ASTM International, 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 serviceas
37、tm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 4 Permissible Variations in DimensionsSpecified size of holes 6132 in. (0.8 mm)Specified location of holes 6116 in. (1.6 m
38、m)Specified length of bar 618 in. (3.2 mm)Maximum camber in either planetee rail applications (see 7.3)Grades 1, 2 Grade 324-in. (610-mm) bars36-in. (914-mm) bars116 in. (1.6 mm)18 in. (3.2 mm)132 in. (0.8 mm)116 in. (1.6 mm)Maximum vertical camber-girder rail applications (see 7.3) (Grades 1 and 2 only)24-in. (610-mm) bars36-in. (914-mm) bars364 in. (1.2 mm)332 in. (2.4 mm)Maximum horizontal camber-girder rail applications (see 7.4) (Grades 1 and 2 only)24-in. (610-mm) bars36-in. (914-mm) bars116 in. (1.6 mm)18 in. (3.2 mm)A3 01 (2012)3
