1、Designation:A656/A656M11 Designation: A656/A656M 12Standard 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 origi
2、nal adoption 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*1.1This1.1 This specification covers three types and five strength
3、grades of high-strength low-alloy, 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 s
4、trength grade furnishedis as agreed upon between the manufacturer and the purchaser. The types and strength grades are shown in the tables.1.2The1.2 The maximum thickness of plates shall be as follows:Grade Plate Thickness, max,in. mm50 2 5060 112 4070 1 2580 1 2510012 131.3 The values stated in eit
5、her inch-pound 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 nonconfo
6、rmance with this 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 addit
7、ional test results, of Specification A6/A6M apply.1This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.02on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current editio
8、n approved Dec.May 1, 2011.2012. Published JanuaryMay 2012. Originally approved in 1972. Last previous edition approved in 20102011 asA656/A656M 101. DOI: 10.1520/A0656_A0656M-112.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of wha
9、t 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
10、 official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled S
11、tructural Steel Bars, Plates, Shapes, and Sheet Piling3. General Requirements for Delivery3.1 Plates furnished under this specification shall 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 specif
12、ication shall prevail.3.2 Coils are excluded from qualification to this specification until they are processed into finished plates. Plates produced fromcoil means plates that have been cut to individual lengths from a coil. The processor directly controls, or is responsible for, theoperations invol
13、ved in the processing of a coil into finished plates. Such operations include decoiling, leveling, cutting to length,testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.NOTE 1For plates produced from coil and furnished withou
14、t heat treatment or with stress relieving only, two test results are to be reported for eachqualifying coil. Additional requirements regarding plate produced from coil are described in Specification A6/A6M.4. Materials and Manufacture4.1 The steel shall be made to fine grain practice.5. Chemical Com
15、position5.1 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 m
16、anufacturer 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 weld
17、ing procedure suitable for the grade of steel and intended use orservice will be utilized.5.4 Unless specifically ordered, the type is at the discretion of the producer.6. Tension Test6.1 The plates as represented by the test specimens shall conform to the requirements given in Table 2.7. Keywords7.
18、1 high-strength low-alloy steel; steel plates; structural applications2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the AS
19、TM website.TABLE 1 Chemical RequirementsNOTEAn ellipsis (. . .) indicates that element is not defined for that Type.ElementsComposition, %Type 3 Type 7 Type 8Carbon, maxA0.18 0.18 0.18Manganese, maxA1.65 1.65 1.65Phosphorus, max 0.025 0.025 0.025Sulfur, max 0.035 0.035 0.035Silicon, max 0.60 0.60 0.
20、60Vanadium, max 0.08 0.15B0.15CNitrogen, max 0.020 0.020 0.020Nitrogen, max 0.030 0.030 0.030Columbium 0.0080.10 0.10 maxB0.10 maxCTitanium, max . . . . . . 0.15CAFor each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage points above the speci
21、fied maximum formanganese is permitted, up to a maximum of 1.75 % for Grades 50, 60, and 70; and up to a maximum of 1.90 % for Grades 80 and 100.BThe contents of columbium and vanadium shall additionally be in accordance with one of the following:columbium 0.0080.10 % with vanadium 0.008 %;columbium
22、 0.008 % with vanadium 0.0080.15 %; orcolumbium 0.0080.10 % with vanadium 0.0080.15 % and columbium plus vanadium not in excess of 0.20 %.CThe sum of columbium, vanadium, and titanium shall be between 0.008 and 0.20 %.A656/A656M 122SUMMARY OF CHANGESCommittee A01 has identified the location of selec
23、ted changes to this standard since the last issue(A656/A656M 101) that may impact the use of this standard. (Approved Dec.May 1, 2011.) 2012.)(1)1.1 revised to include five strength grades.(2)1.2, Footnote A to ) Revised nitrogen limit in Table 1 , and Table 2 modified to include Grade 100.Committee
24、 A01 has identified the location of selected changes to this standard since the last issue(A656/A656M052) that may impact the use of this standard. (Approved Oct. 1, 2010.)(1)1.2 was revised.(2)Table 2 was revised.for all three types.ASTM International takes no position respecting the validity of an
25、y 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 to rev
26、ision 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. Your
27、 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 copyr
28、ighted 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 serviceastm.org
29、 (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 2 Tensile RequirementsAGrade 50345Grade 60415Grade 70485Grade 80550Grade 100690Yield point, min, ksi MPa 50 345 60 415 70 485 80
30、 550 100 690Tensile strength, min, ksi MPa 60 415 70 485 80 550 90 620 110 760Elongation in 8 in. 200 mm, min, % 20B17B14B12B12BElongation in 2 in. 50 mm, min, % 23B20B17B15B15BASee Specimen Orientation under the Tension Tests section of Specification A6/A6M.BFor plates wider than 24 in. 600 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 123
