1、Designation: A 656/A 656M 05e2Standard Specification forHot-Rolled Structural Steel, High-Strength Low-Alloy Platewith Improved Formability1This standard is issued under the fixed designationA 656/A 656M; the number immediately following the designation indicates the yearof original adoption or, in
2、the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTETable 1 was corrected editorially in February 2006.e2NOTETheScope(1.1) was corrected edit
3、orially in October 2007.1. Scope*1.1 This specification covers three types and four strengthgrades 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 specifica-tion offer improve
4、d formability. These steels are normallyfurnished in the as-rolled condition. The type and strengthgrade furnished is as agreed upon between the manufacturerand the purchaser. The types and strength grades are shown inthe tables.1.2 The maximum thickness of plates shall be as follows:Grade Plate Thi
5、ckness, max,in. mm50 2 5060 112 4070 1 258034 201.3 The values stated in either inch-pound units or SI unitsare to be regarded as standard. Within the text, the SI units areshown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendentl
6、y of the other. Combining values from the two systemsmay result in nonconformance with this specification. SeeAppendix X3 of Specification A 6/A 6M for information onweldability.1.4 For plates produced from coil and furnished withoutheat treatment or with stress relieving only, the additionalrequire
7、ments, including additional testing requirements and thereporting of additional test results, of Specification A 6/A 6Mapply.2. Referenced Documents2.1 ASTM Standards:2A 6/A 6M Specification for General Requirements forRolled Structural Steel Bars, Plates, Shapes, and SheetPiling3. General Requireme
8、nts for Delivery3.1 Plates furnished under this specification shall conformto the requirements of the current edition of SpecificationA 6/A 6M, for the specific plate ordered, unless a conflictexists, in which case this specification shall prevail.3.2 Coils are excluded from qualification to this sp
9、ecifica-tion until they are processed into finished plates. Platesproduced from coil means plates that have been cut toindividual lengths from a coil. The processor directly controls,or is responsible for, the operations involved in the processingof a coil into finished plates. Such operations inclu
10、de decoiling,leveling, cutting to length, testing, inspection, conditioning,heat treatment (if applicable), packaging, marking, loading forshipment, and certification.NOTE 1For plates produced from coil and furnished without heattreatment or with stress relieving only, two test results are to be rep
11、ortedfor each qualifying coil.Additional requirements regarding plate producedfrom coil are described in Specification A 6/A 6M.4. Materials and Manufacture4.1 The steel shall be made to fine grain practice.5. Chemical Composition5.1 Heat analyses shall conform to the chemical require-ments given in
12、 Table 1. Dependent upon thickness, grade, andintended application, variations in the chemical compositionare permitted within the limits given in Table 1 for the1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsi
13、bility of SubcommitteeA01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved Sept. 1, 2005. Published October 2005. Originallyapproved in 1972. Last previous edition approved in 2003 as A 656/A 656M03.2For referenced ASTM standards, visit the ASTM website
14、, 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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Dr
15、ive, PO Box C700, West Conshohocken, PA 19428-2959, United States.applicable type. Where it is of particular importance, themanufacturer should be consulted for specific chemical com-position.5.2 Product AnalysisIf a product analysis is made, it shallconform to the requirements given in Table 1, sub
16、ject to theproduct analysis tolerances of Specification A 6/A 6M.5.3 Where steel is to be welded, it is presupposed that awelding procedure suitable for the grade of steel and intendeduse or service will be utilized.5.4 Unless specifically ordered, the type is at the discretionof the producer.6. Ten
17、sion Test6.1 The plates as represented by the test specimens shallconform to the requirements given in Table 2.7. Keywords7.1 high-strength low-alloy steel; steel plates; structuralapplicationsSUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the
18、last issue(A 656/A 656M03) that may impact the use of this standard.(1) Table 1 was modified to include Type 8 chemistry andTitanium.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.
19、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 0.60Vanadium, max 0.08 0.15B0.15CNitrogen, max 0.020 0.020 0.020Columbium 0.0080.10 0.10 maxB0.10 maxCTitanium, max . . 0.15CAFor each reduction of 0.01 percentage point below the spec
20、ified maximum for carbon, an increase of 0.06 percentage points above the specified 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 Grade 80.BThe contents of columbium and vanadium shall additionally be in accordance with one
21、of the following:columbium 0.008-0.10 % with vanadium 0.008 %;columbium 0.008 % with vanadium 0.008-0.15 %; orcolumbium 0.008-0.10 % with vanadium 0.008-0.15 % 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 %.Footnote
22、 reference corrected editorially.TABLE 2 Tensile RequirementsAGrade 50345Grade 60415Grade 70485Grade 80550Yield point, min, ksi MPa 50 345 60 415 70 485 80 550Tensile strength, min, ksi MPa 60 415 70 485 80 550 90 620Elongation in 8 in. 200 mm, min, %B20 17 14 12Elongation in 2 in. 50 mm, min, %B23
23、20 17 15ASee 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, and 80 415, 485, and 550. See Elongation Requirem
24、ent Adjustments in the Tension Tests section of Specification A6/A6M.A 656/A 656M 05e22ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of
25、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 reviewed every five years andif not revised, either reapproved or withdrawn. Y
26、our 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 theresponsible technical committee, which you may attend. If you feel that your commen
27、ts 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 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 656/A 656M 05e23
