1、Designation: A1043/A1043M 05 (Reapproved 2009)Standard Specification forStructural Steel with Low Yield to Tensile Ratio for Use inBuildings1This standard is issued under the fixed designation A1043/A1043M; the number immediately following the designation indicates theyear of original adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () 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
3、shapes and plates 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 Specification A6/A6M Annex A2 andplates up to and including 5 in. 125 mm thick are included inthis specifi
4、cation.1.3 Supplementary 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 inte
5、nded use or service is tobe utilized. See Appendix X3 of Specification A6/A6M forinformation on weldability.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 man
6、datory requirements.1.6 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 equivalents; therefore, each system is tobe used independently of the other wit
7、hout combining values inany way.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA673/A673M Specification for Sampling Pro
8、cedure forImpact Testing of Structural SteelA770/A770M Specification for Through-Thickness TensionTesting 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 Specificatio
9、nA6/A6M 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 o
10、f 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 pr
11、oduct analysistolerances in Specification A6/A6M.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, Buildings, Rolling Stock and Ships.Current edition
12、approved Oct. 1, 2009. Published December 2009. Originallyapproved in 2005. Last previous edition approved in 2005 as A1043/A1043M 05.DOI: 10.1520/A1043_A1043M-05R09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual B
13、ook 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.5.3 The maximum permissible carbon equivalent valuesshall be:GradeThickness of P
14、lateand 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 required chemical analysis as well as the carbonequivalent shall be reported. The carbon equivalent shall becalculated using the fo
15、llowing formula:CE 5 C 1 Mn!/6 1 Cr 1 Mo 1 V!/5 1 Ni 1 Cu!/15 (1)6. Tensile Requirements6.1 The product as represented by 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 accordancew
16、ith Specification A673/A673M, frequency H. The test resultsfor full-size test specimens shall conform to the followingminimum 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
17、 to or greaterthan 112 in. 38.1 mm the test specimens shall be taken fromthe Alternate Core Location as defined in Specification A673/A673M.8. Keywords8.1 building framing; low yield to tensile ratio; plates;shapes; structural steel; welded constructionSUPPLEMENTARY REQUIREMENTSSupplementary require
18、ments shall not apply unless specified in the purchase order or contract.Standardized supplementary requirements for use at the option of the purchaser are listed inSpecification A6/A6M. Those that are considered suitable for use with this specification are listed bytitle.S1. Vacuum Treatment,S2. Pr
19、oduct Analysis, andS8. Ultrasonic Examination.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 0.501.60Phosphorus, max 0.035 0.035Sulfur, max 0.045
20、 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 shall not exceed 0.15 %.TABLE 2 Tensile Requiremen
21、tsAGrade36 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 Orientation under the Tension Tests section of Spe
22、cificationA6/A6M.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.A1043/A1043M 05 (2009)2ADDITIONAL SUPPLEMENTARY REQUIREMENTSIn addition, the following optional
23、 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 A770/A770M except for test frequency. The test frequency shall bethe same as the tension
24、 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. Grade 5
25、0 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 and 0.
26、40 % for plates over 2 in. 50 mm inthickness, calculated using the following formula:CE = C + Mn/6 + (Cr + Mo + V)/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 A6/A6M, the letters “TMC” shall be marked fo
27、llowing thespecification designation mark.S74. Grade 50 Plates Restricted PcmCarbon EquivalentLimitS74.1 The plates 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 exce
28、ed 0.24 % for plates 2 in. 50 mmor under in thickness and 0.26 % for plates over 2 in. 50 mmin thickness, calculated 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 mar
29、king required by Specifica-tion A6/A6M, the letters “TMC” shall be marked following thespecification designation 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
30、 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 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, ei
31、ther 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 comments will receive careful consideration at a meeting of theresponsible technical committee, which you may atten
32、d. 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 copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. In
33、dividual 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A1043/A1043M 05 (2009)3
