1、Designation: A656/A656M 13A656/A656M 18Standard Specification forHot-Rolled Structural Steel, High-Strength Low-Alloy Platewith Improved Formability1This standard is issued under the fixed designation A656/A656M; the number immediately following the designation indicates the yearof original adoption
2、 or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers three types and five strength grades of high-stre
3、ngth low-alloy, hot rolled hot-rolled structural steelplate for use in truck frames, brackets, crane booms, rail cars, and similar applications. Steels that conform to this specificationoffer improved formability. These steels are normally furnished in the as-rolled condition. The type and strength
4、grade furnishedis as agreed upon between the manufacturer and the purchaser. The types and strength grades are shown in the tables.1.2 The maximum thickness of plates shall be as follows:Grade Plate Thickness, max,in. mm50 2 5060 112 4070 1 2580 1 25100 12 131.3 The values stated in either inch-poun
5、d units or SI units are to be regarded as standard. Within the text, the SI units are shownin brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of theother. Combining values from the two systems may result in nonconformance with t
6、his specification. See Appendix X3 ofSpecification A6/A6M for information on weldability.1.4 For plates produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements,including additional testing requirements and the reporting of additional test re
7、sults, of Specification A6/A6M apply.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade
8、Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling3. General Requirements for Delivery3.1 Plates furnished under this specification shall
9、conform to the requirements of the current edition of Specification A6/A6M,for the specific plate ordered, unless a conflict exists, in which case this specification shall prevail.3.2 Coils are excluded from qualification to this specification until they are processed into finished plates. Plates pr
10、oduced fromcoil means plates that have been cut to individual lengths from a coil. The processor directly controls, or is responsible for, theoperations involved in the processing of a coil into finished plates. Such operations include decoiling, leveling, cutting to length,testing, inspection, cond
11、itioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.NOTE 1For plates produced from coil and furnished without heat treatment or with stress relieving only, two test results are to be reported for eachqualifying coil. Additional requirements regarding
12、 plate produced from coil are described in Specification A6/A6M.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.02on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.C
13、urrent edition approved Oct. 15, 2013May 1, 2018. Published November 2013May 2018. Originally approved in 1972. Last previous edition approved in 20122013 asA656/A656M 12aA656/A656M 13.1. DOI: 10.1520/A0656_A0656M-13.10.1520/A0656_A0656M-18.2 For referencedASTM standards, visit theASTM website, www.
14、astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what
15、 changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the
16、official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Materials and Manufacture4.1 The steel shall be made to fine grain practice.5. Chemical Composition5
17、.1 Heat analyses shall conform to the chemical requirements given in Table 1. Dependent upon thickness, grade, and intendedapplication, variations in the chemical composition are permitted within the limits given in Table 1 for the applicable type. Whereit is of particular importance, the manufactur
18、er should be consulted for specific chemical composition.5.2 Product AnalysisIf a product analysis is made, it shall conform to the requirements given in Table 1, subject to the productanalysis tolerances of Specification A6/A6M.5.3 Where steel is to be welded, it is presupposed that a welding proce
19、dure suitable for the grade of steel and intended use orservice will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.5.4 Unless specifically ordered, the type is at the discretion of the producer.6. Tension TestMechanical Properties6.1 The plates as represented by
20、 the test specimens shall conform to the requirements given in Table 2. Tensile Properties:6.1.1 The plates as represented by the test specimens shall conform to the requirements given in Table 2.7. Keywords7.1 high-strength low-alloy steel; steel plates; structural applicationsTABLE 1 Chemical Requ
21、irementsNOTE 1An ellipsis (. . .) indicates that element is not defined for that Type.Elements Composition, %Type 3 Type 7 Type 8Carbon, maxA 0.18 0.18 0.18Manganese, maxA 1.65 1.65 1.65Phosphorus, max 0.025 0.025 0.025Sulfur, max 0.030 0.030 0.030Silicon, max 0.60 0.60 0.60Vanadium, max 0.08 0.15B
22、0.15CNitrogen, max 0.030 0.030 0.030Columbium (niobium)D 0.0080.10 0.10 maxB 0.10 maxCTitanium, max . . . . . . 0.15CA For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage points above the specified maximum formanganese is permitted, up t
23、o a maximum of 1.75 % for Grades 50, 60, and 70; 70 345, 415, and 485 MPa; up to a maximum of 1.90 % for Grade 80; 80 550; andup to a maximum of 2.10 % for Grade 100.100 690.B The contents of columbium (niobium) and vanadium shall additionally be in accordance with one of the following:columbium Col
24、umbium (niobium) 0.0080.10 % with vanadium 0.008 %;columbium Columbium (niobium) 0.008 % with vanadium 0.0080.15 %; orcolumbium Columbium (niobium) 0.0080.10 % with vanadium 0.0080.15 % and columbium (niobium) plus vanadium not in excess of 0.20 %.C The sum of columbium, columbium (niobium), vanadiu
25、m, and titanium shall be between 0.008 and 0.20 %.D Columbium and niobium are interchangeable names for the same element.A656/A656M 182SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A656/A656M 12aA656/A656M 131) that may impact t
26、he use of this standard. (Approved Oct. 15,2013May 1, 2018.)(1) Revised 1.1.(2) Revised 1.3.(3) Revised Table 1 to modify sulfur limits(4) Revised 5.3.(5) Revised Section 6.Committee A01 has identified the location of selected changes to this standard since the last issue(A656/A656M 12) that may imp
27、act the use of this standard. (Approved Nov. 1, 2012.)(1) Adjusted Table 1 Footnote A, increasing maximum permissible manganese for grade 100 from 1.90 % to 2.10 %.TABLE 2 Tensile RequirementsAGrade 50345Grade 60415Grade 70485Grade 80550Grade 100690Yield point, min, ksi MPa 50 345 60 415 70 485 80 5
28、50 100 690Tensile strength, min, ksi MPa 60 415 70 485 80 550 90 620 110 760Elongation in 8 in. 200 mm, min, % 20B 17B 14B 12B 12BElongation in 2 in. 50 mm, min, % 23B 20B 17B 15B 15BA See Specimen Orientation under the Tension Tests section of Specification A6/A6M.B For plates wider than 24 in. 600
29、 mm, the elongation requirement is reduced two percentage points for Grade 50 345 and three percentage points for Grades 60, 70,80, and 100 415, 485, 550, and 690. See Elongation Requirement Adjustments in the Tension Tests section of Specification A6/A6M.A656/A656M 183Committee A01 has identified t
30、he location of selected changes to this standard since the last issue(A656/A656M 11) that may impact the use of this standard. (Approved May 1, 2012.)(1) Revised nitrogen limit in Table 1 for all three types.ASTM International takes no position respecting the validity of any patent rights asserted i
31、n 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 r
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33、ful 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 Internationa
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