1、Designation: A 1043/A 1043M 05Standard Specification forStructural Steel with Low Yield to Tensile Ratio for Use inBuildings1This standard is issued under the fixed designation A 1043/A 1043M; the number immediately following the designation indicates theyear of original adoption or, in the case of
2、revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers two grades, 36 250 and 50345 of rolled steel structural shapes and pl
3、ates with low yieldto tensile ratio for use in building framing or for generalstructural purposes.1.2 All shape profiles with a flange width of 6 in. 150 mmand greater described in SpecificationA 6/A 6MAnnexA2 andplates up to and including 5 in. 125 mm thick are included inthis specification.1.3 Sup
4、plementary requirements are provided for use whereadditional testing or additional restrictions are required by thepurchaser. Such requirements apply only when specified in thepurchase order.1.4 When the steel is to be welded, a welding proceduresuitable for the grade of steel and intended use or se
5、rvice is tobe utilized. See Appendix X3 of Specification A 6/A 6M forinformation on weldability.1.5 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 equ
6、ivalents; therefore, each system is tobe used independently of the other without combining values inany way.1.6 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 man
7、datory 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 f
8、orImpact Testing of Structural SteelA 770/A 770M Specification for Through-Thickness Ten-sion Testing of Steel Plates for Special Applications3. General Requirements for Delivery3.1 Product furnished under this specification shall conformto the requirements of the current edition of SpecificationA 6
9、/A 6M for the ordered product, unless a conflict exists, 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, a value of
10、0.015 % or more forthe total aluminum content, or a value of 0.006 % or more forthe titanium content.5. Chemical Composition5.1 The heat analysis shall conform to the requirementsgiven in Table 1.5.2 The steel shall conform on product analysis to therequirements given in Table 1, subject to the prod
11、uct analysistolerances in Specification A 6/A 6M.5.3 The maximum permissible carbon equivalent valuesshall be:GradeThickness of Plateand Shape FlangeCE Value max %36 250 All 0.3750 345 # 2 in. 50 mm 0.4550 345 2 in. 50 mm 0.475.3.1 The carbon equivalent value shall be based upon heatanalysis. The re
12、quired chemical analysis as well as the carbonequivalent shall be reported. The carbon equivalent shall becalculated using the following formula:CE 5 C 1 Mn!/6 1 Cr 1 Mo 1 V!/5 1 Ni 1 Cu!/15 (1)1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related A
13、lloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved April 1, 2005. Published April 2005.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servi
14、ceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Tensile Requirements6.1 The product as represented by
15、 the test specimens shallconform to the requirements for tensile properties given inTable 2.7. Charpy Impact Requirements7.1 Charpy V-notch tests shall be conducted in accordancewith Specification A 673/A 673M, frequency H. The test re-sults for full-size test specimens shall conform to the followin
16、gminimum average value for Grades 36 250 and 50 345:40 ftlbf 54 J at 70F 21Cor a lower test temperature as specified in the purchase order.7.2 For shapes with a flange thickness equal to or greaterthan 112 in. 38.1 mm the test specimens shall be taken fromthe Alternate Core Location as defined in Sp
17、ecification A 673/A 673M.8. Keywords8.1 building framing; low yield to tensile ratio; plates;shapes; structural steel; welded constructionSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order or contract.Standardized supplementary requirements fo
18、r use at the option of the purchaser are listed inSpecification A 6/A 6M. Those that are considered suitable for use with this specification are listed bytitle.S1. Vacuum Treatment,S2. Product Analysis, andS8. Ultrasonic Examination.ADDITIONAL SUPPLEMENTARY REQUIREMENTSIn addition, the following opt
19、ional supplementary requirements are suitable for use with this specification.S71. Through-thickness Tension TestsS71.1 Through-thickness tension test shall be made inaccordance with the requirements of Specification A 770/A 770M except for test frequency. The test frequency shall bethe same as the
20、tension test frequency.S72. PcmCarbon Equivalent LimitS72.1 The Pcmcarbon equivalent for each heat, based uponheat analysis, shall not exceed 0.26 % for grade 36 250 or0.29 % for Grade 50 345, calculated using the followingformula:Pcm= C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B %S73.
21、Grade 50 Plates Restricted Carbon EquivalentLimitS73.1 The plates shall be produced by the thermo-mechanical control process (TMCP) or shall be quenched andtempered.S73.2 The carbon equivalent for each heat, based upon heatanalysis, shall not exceed 0.38 % for plates 2 in. 50 mm orunder in thickness
22、 and 0.40 % for plates over 2 in. 50 mm inthickness, calculated using the following formula:TABLE 1 Chemical Requirements (Heat Analysis)Composition, %Element Grade36 250Grade50 345Carbon, max 2 in. 50 mm and less in thickness 0.20 0.20Over 2 in. 50 mm in thickness 0.22 0.22Manganese 0.501.40 0.501.
23、60Phosphorus, max 0.035 0.035Sulfur, max 0.045 0.045Silicon, max 0.35 0.55Nitrogen, max 0.012 0.012Nickel, max 0.45 0.45Chromium, max 0.35 0.35Molybdenum, max 0.15 0.15Copper, max 0.50 0.50Vanadium, max 0.15A0.15AColumbium, max 0.05A0.05ATitanium, max 0.03 0.03AThe sum of columbium and vanadium shal
24、l not exceed 0.15 %.TABLE 2 Tensile RequirementsAGrade36 250 50 345Tensile strength, min, ksi MPa 58 400 65 450Yield point, ksi MPa 36 to 52250 to 36050 to 65345 to 450Yield to tensile ratio, max 0.80 0.80Elongation in 8 in. 200 mm, min %B20 18Elongation in 2 in. 50 mm, min %B23 21ASee Specimen Orie
25、ntation under the Tension Tests section of SpecificationA 6/A 6M.BFor plates wider than 24 in. 600 mm the elongation requirement is reducedtwo percentage points. See Elongation Requirement Adjustments in the TensionTests section of Specification A6/A6M.A 1043/A 1043M 052CE = C + Mn/6 + (Cr + Mo + V)
26、/5 + (Cu + Ni)/15 %S73.3 For plates produced by the thermo-mechanical con-trol process, in addition to the marking required by Specifica-tion A 6/A 6M, the letters “TMC” shall be marked followingthe specification designation mark.S74. Grade 50 Plates Restricted PcmCarbon EquivalentLimitS74.1 The pla
27、tes shall be produced by the thermo-mechanical control process (TMCP) or shall be quenched andtempered.S74.2 The Pcmcarbon equivalent for each heat, based uponheat analysis, shall not exceed 0.24 % for plates 2 in. 50 mmor under in thickness and 0.26 % for plates over 2 in. 50 mmin thickness, calcul
28、ated using the following formula:Pcm= C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B %S74.3 For plates produced by the thermo-mechanical con-trol process, in addition to the marking required by Specifica-tion A 6/A 6M, the letters “TMC” shall be marked followingthe specification designati
29、on mark.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 determination of the validity of any such patent rights, and the riskof infringement of such rig
30、hts, 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. Your comments are invited either for revision of this standard or for additional
31、 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 comments have not received a fair hearing you shouldmake your views known to the ASTM
32、 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 1043/A 1043M 053
