1、Designation: A 992/A 992M 06aStandard Specification forStructural Steel Shapes1This standard is issued under the fixed designation A 992/A 992M; 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
2、 parentheses indicates the year of last reapproval.A superscript epsilon (e) 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 Suppleme
3、ntary 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
4、 is tobe utilized. See Appendix X3 of Specification A 6/A 6M 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 are not exact equivale
5、nts; therefore, each system is tobe used independently of the other without combining values inany way.1.5 The text of this specification contains notes or footnotes,or both, that provide explanatory material; such notes andfootnotes, excluding those in tables and figures, do not containany mandator
6、y requirements.2. Referenced Documents2.1 ASTM Standards:2A 6/A 6M Specification for General Requirements forRolled Structural Steel Bars, Plates, Shapes, and SheetPilingA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 673/A 673M Specification for Sampling Procedure forImp
7、act Testing of Structural SteelE 112 Test Methods for Determining Average Grain Size3. General Requirements For Delivery3.1 Material furnished under this specification shall con-form to the requirements of the current edition of SpecificationA 6/A 6M for the ordered material, unless a conflict exist
8、s, inwhich case this specification shall prevail.4. Materials and Manufacture4.1 The steel shall be killed, and such shall be affirmed inthe test report by a statement of killed steel, a value of 0.10 %or more for the silicon content, or a value of 0.015 % or morefor the total aluminum content.4.2 T
9、he steelmaking practice used shall be one that pro-duces steel having a nitrogen content not greater than 0.015 %and includes 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-bi
10、nding elements). The nitrogen content need not bereported, regardless of which steelmaking practice was used.5. Chemical Composition5.1 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 che
11、mical analysis for tin.Where the amount of tin is less than 0.02 %, it shall bepermissible for the analysis to be reported as “ 0.02 %.”5.3 The steel shall conform on product analysis to therequirements prescribed in Table 1, subject to the productanalysis tolerances in Specification A 6/A 6M.5.4 Th
12、e maximum permissible carbon equivalent value shallbe 0.47 % for shapes with flange thickness over 2 in. 50 mm,and 0.45 % in other shapes. The carbon equivalent value shallbe based on heat analysis. The required chemical analysis aswell as the carbon equivalent shall be reported. The carbonequivalen
13、t shall be calculated using the following formula:CE 5 C 1Mn!/6 1Cr 1 Mo 1 V!/51Ni1 Cu!/15 (1)1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges, Build
14、ings, Rolling Stock, and Ships.Current edition approved July 1, 2006. Published July 2006. Originally approvedin 1998. Last previous edition approved in 2006 as A 992/A 992M 06.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. F
15、or 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 Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.
16、Tensile Requirements6.1 The material 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 constructionSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall appl
17、y only if specified in the purchase order or contract.Standardized supplementary requirements for use at theoption of the purchaser are listed in Specification A 6/A 6M.Those that are considered suitable for use with this specifica-tion are listed by title:S1. Vacuum TreatmentS2. Product AnalysisS5.
18、 Charpy V-Notch Impact TestS8. Ultrasonic ExaminationS30. Charpy V-Notch Impact Test for Structural Shapes: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 b
19、ars shall be from asingle heat of steel.S79. Maximum Tensile StrengthS79.1 The maximum tensile strength shall be 90 ksi 620MPa.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue (A 992/A992M 06) that may impact the use of this standa
20、rd. (Approved July 1, 2006.)(1) The value for maximum manganese in Table 1 was changedfrom 1.50 % to 1.60 %.TABLE 1 Chemical Requirements (Heat Analysis)Element Composition, %Carbon, max 0.23Manganese, 0.50 to 1.60ASilicon, max 0.40Vanadium, max 0.15BColumbium, max 0.05BPhosphorus, max 0.035Sulfur,
21、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 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
22、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 0.85BElongation in 8 in. 200 mm, min, %C18Elongation in 2 in. 50 mm, min, %C21AAmaximum yield strength of 70 ksi 480 MPa is permitted for struc
23、tural shapesthat 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.CSee elongation requirement adjustments under the Tension Tests section ofSpecification A 6/A 6M.A 992/A 992M 06a2Committee A01 has identi
24、fied the location of selected changes to this standard since the last issue (A 992/A 992M 04a) thatmay impact the use of this standard. (Approved March 15, 2006.)(1) Table 2 was modified to allow a maximum yield-to-tensileratio of 0.87 for structural shapes that are tested from the weblocation.(2) T
25、able 2 was modified to change the maximum yieldstrength from 65 ksi to 70 ksi 450 MPa to 480 MPa forsections tensile tested in the web.Committee A01 has identified the location of selected changes to this standard since the last issue (A 992/A 992M 04) thatmay impact the use of this standard. (Appro
26、ved Sept. 1, 2004.)(1) Numeric value of vanadium maximum increased from 0.11to 0.15 in Table 1.ASTM 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 determina
27、tion 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 technical committee and must be reviewed every five years andif not revised, either reapproved or with
28、drawn. 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 consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that you
29、r 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 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 992/A 992M 06a3
