1、Designation: A 3 01 (Reapproved 2006)Standard Specification forSteel Joint Bars, Low, Medium, and High Carbon (Non-Heat-Treated)1This standard is issued under the fixed designation A 3; the number immediately following the designation indicates the year of originaladoption or, in the case of revisio
2、n, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon (e) 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 co
3、vers 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
4、 for 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 the standard. The values given in parentheses are forinformation only.2. Refer
5、enced Documents2.1 ASTM Standards:2A 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for Shipment3. Ordering Information3.1 Orders for joint bars under this specification shallinclude the following
6、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 Dimensionoverall length,3.1.5 Punchingtype (elliptical, oval, round, or combin
7、a-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 Test Report Requirements(Section11).4. Manufacture4.1 The steel shall be made by
8、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 case of special designs, either hot orcold. Joint bars that are punched, slotted,
9、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 tochemical composition prescribed in Table 1.5.2 Heat or Cast AnalysisAn analysis
10、of each heat or castshall be made by the manufacturer to determine the percent-ages of carbon, manganese, phosphorus, and sulfur. Theanalysis shall be made from a test sample taken preferably1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Allo
11、ys, and is the direct responsibility of SubcommitteeA01.01 on Steel Rails and Accessories.Current edition approved March 1, 2006. Published March 2006. Originallyapproved in 1901. Last previous edition approved in 2001 as A3 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or
12、contact 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, min . 0.30 0.45Phosphorus, max 0.05 0.05 0.041Copy
13、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.during 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
14、Product AnalysisWhen ladle tests 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 pu
15、rchaser from asample taken from 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
16、prescribedin Table 3.6.2 Test SpecimenThe 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
17、Methodsand Definitions A 370.6.3 Number 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 s
18、pecified in Table 3.6.4.1 If any test 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 shallaccur
19、ately fit the rails for which they 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 lin
20、e in a vertical planeshall be such 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 sh
21、all be straight, subject to the variationsprescribed 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 ins
22、pectorall reasonable facilities necessary 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 ma
23、nufacture, unlessotherwise agreed 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 ma
24、nufacturer orsupplier may make claim 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 fou
25、nd to meet the requirements.11.2 When 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 interchan
26、ge (EDI) transmission shall beregarded 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 supplie
27、r.11.4 Notwithstanding the absence 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 manufactu
28、rer and the year ofmanufacture shall 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:TABLE 2 Pro
29、duct AnalysisAllowance Beyond Limits of Specified ChemicalAnalysisPercent undermin limitPercent overmax limitCarbon 0.04 0.04Phosphorus . . . 0.008TABLE 3 Tensile 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 1
30、5A 3 01 (2006)212.2.1 The section designation shall be included 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 Stan
31、dard for Primary Metals for Steel Products may beconsidered as a possible auxiliary method of identification. Useof this method shall be by agreement between purchaser andsupplier.13. U.S. Government Procurement13.1 When specified in the contract or purchase order,material shall be prepared for ship
32、ment and storage in accor-dance with the requirements of Practices A 700.14. Keywords14.1 rail; railway applications; steel joint barsTABLE 4 Permissible Variations in DimensionsSpecified size of holes 6132 in. (0.8 mm)Specified location of holes 6116 in. (1.6 mm)Specified length of bar 618 in. (3.2
33、 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-m
34、m) 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)ASTM International takes no position respecting the validity of any patent rights asserted in connection wit
35、h 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 responsible techn
36、ical 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. Your comments will receive careful considerati
37、on 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 International, 100 Barr Har
38、bor 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 3 01 (2006)3
