1、Designation: A992/A992M 11Standard Specification forStructural Steel Shapes1This standard is issued under the fixed designation A992/A992M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in pare
2、ntheses 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 rolled steel structural shapesfor use in building framing or bridges, or for general structuralpurposes.1.2 Supplementary
3、requirements are provided for use whereadditional testing or additional restrictions are required by thepurchaser. Such requirements apply only when specified in thepurchase order.1.3 When the steel is to be welded, a welding proceduresuitable for the grade of steel and intended use or service is to
4、be utilized. See Appendix X3 of Specification A6/A6M forinformation on weldability.1.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents;
5、therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.5 The text of this specification contains notes or footnotes,or both, that provide explanatory material; such notes andfootnotes, excluding those in t
6、ables and figures, do not containany mandatory requirements.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet Piling3. General Requirements For Delivery3.1 Material furnished under this specification sh
7、all con-form to the requirements of the current edition of SpecificationA6/A6M for the ordered material, unless a conflict exists, inwhich case this specification shall prevail.4. Materials and Manufacture4.1 The steel shall be killed, and such shall be confirmed bya statement of killed steel on the
8、 test report, or by a report onthe presence of a sufficient quantity of a strong deoxidizingelement, such as silicon at 0.10 % or higher, or aluminum at0.015 % or higher.4.2 The steelmaking practice used shall be one that pro-duces steel having a nitrogen content not greater than 0.015 %and includes
9、 the addition of one or more nitrogen-bindingelements, or one that produces steel having a nitrogen contentnot greater than 0.012 % (with or without the addition ofnitrogen-binding elements). The nitrogen content need not bereported, regardless of which steelmaking practice was used.5. Chemical Comp
10、osition5.1 The heat analysis shall conform to the requirements inTable 1.5.2 In addition to the elements listed in Table 1, test reportsshall include, for information, the chemical analysis for tin.Where the amount of tin is less than 0.02 %, it shall bepermissible for the analysis to be reported as
11、 “0.02 %.”5.3 The steel shall conform on product analysis to therequirements prescribed in Table 1, subject to the productanalysis tolerances in Specification A6/A6M.5.4 The maximum permissible carbon equivalent value shallbe 0.47 % for shapes with flange thickness over 2 in. 50 mm,and 0.45 % in oth
12、er shapes. The carbon equivalent value shallbe based on heat analysis. The required chemical analysis aswell as the carbon equivalent shall be reported. The carbonequivalent shall be calculated using the following formula:CE 5 C 1Mn!/6 1Cr 1 Mo 1 V!/51Ni 1 Cu!/15 (1)6. Tensile Requirements6.1 The ma
13、terial as represented by the test specimens shallconform to the requirements for tensile properties prescribed inTable 2.7. Keywords7.1 bridges; building framing; shapes; structural steel;welded construction1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel
14、and Related Alloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved May 1, 2011. Published May 2011. Originallyapproved in 1998. Last previous edition approved in 2006 as A992/A992M 06a.DOI: 10.1520/A0
15、992_A0992M-11.2For referenced ASTM 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.1*A Summary of Changes section appears at the e
16、nd of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall apply only if specified in the purchase order or contract.Standardized supplementary requirements for use a
17、t theoption of the purchaser are listed in Specification A6/A6M.Those that are considered suitable for use with this specifica-tion are listed by title:S1. Vacuum TreatmentS2. Product AnalysisS5. Charpy V-Notch Impact TestS8. Ultrasonic ExaminationS30. Charpy V-Notch Impact Test for Structural Shape
18、s:Alternate Core LocationIn addition, the following optional supplementary require-ments are suitable for use with this specification.S32. Single Heat Bundles.S32.1 Bundles containing shapes or bars shall be from asingle heat of steel.S79. Maximum Tensile StrengthS79.1 The maximum tensile strength s
19、hall be 90 ksi 620MPa.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A992/A992M 06a) that may impact the use of this standard. (Approved May 1, 2011.)(1) Revised 2.1 and 4.1.TABLE 1 Chemical Requirements (Heat Analysis)Element Co
20、mposition, %Carbon, max 0.23Manganese, 0.50 to 1.60ASilicon, max 0.40Vanadium, max 0.15BColumbium, max 0.05BPhosphorus, max 0.035Sulfur, max 0.045Copper, max 0.60Nickel, max 0.45Chromium, max 0.35Molybdenum, max 0.15AProvided that the ratio of manganese to sulfur is not less than 20 to 1, theminimum
21、 limit for manganese for shapes with flange or leg thickness notexceeding 1 in. 25 mm shall be 0.30 %.BThe sum of columbium and vanadium shall not exceed 0.15 %.TABLE 2 Tensile RequirementsTensile strength, min ksi MPa 65 450Yield point, ksi MPa 50 to 65 345 to 450AYield to tensile ratio, max 0.85BE
22、longation in 8 in. 200 mm, min, %C18Elongation in 2 in. 50 mm, min, %C21AA maximum yield strength of 70 ksi 480 MPa is permitted for structuralshapes that are required to be tested from the web location.BA maximum ratio of 0.87 is permitted for structural shapes that are tested fromthe web location.
23、CSee elongation requirement adjustments under the Tension Tests section ofSpecification A6/A6M.A992/A992M 112ASTM 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
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26、 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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual
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