1、Designation: A1043/A1043M 05 (Reapproved 2009)A1043/A1043M 14Standard 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
2、 adoption or, in 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. Scope Scope*1.1 This specification covers two grades, 36 250 and 50 345 of r
3、olled steel structural shapes and plates with low yield totensile ratio for use in building framing or for general structural purposes.1.2 All shape profiles with a flange width of 6 in. 150 mm and greater described in Specification A6/A6M, Annex A2, andplates up to and including 5 in. 125 mm thick
4、are included in this specification.1.3 Supplementary requirements are provided for use where additional testing or additional restrictions are required by thepurchaser. Such requirements apply only when specified in the purchase order.1.4 When the steel is to be welded, a welding procedure suitable
5、for the grade of steel and intended use or service is to beutilized. See Appendix X3 of Specification A6/A6M for information 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 a
6、nd figures, do not contain any mandatory requirements.1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system are not exact equivalents; therefore, each system is to b
7、e usedindependently of the other without combining values in any way.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA6
8、73/A673M Specification for Sampling Procedure for Impact Testing of Structural SteelA770/A770M Specification for Through-Thickness Tension Testing of Steel Plates for Special Applications3. General Requirements for Delivery3.1 Product furnished under this specification shall conform to the requireme
9、nts of the current edition of Specification A6/A6Mfor the ordered product, unless a conflict exists, in which case this specification shall prevail.4. Materials and Manufacture4.1 The steel shall be killed, and such shall be affirmed in the test report by a statement of killed steel, a value of 0.10
10、 % or morefor the silicon content, a value of 0.015 % or more for the total aluminum content, or a value of 0.006 % or more for the titaniumcontent.5. Chemical Composition5.1 The heat analysis shall conform to the requirements given in Table 1.5.2 The steel shall conform on product analysis to the r
11、equirements given in Table 1, subject to the product analysis tolerancesin Specification A6/A6M.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.02on Structural Steel for Bridges, Buil
12、dings, Rolling Stock and Ships.Current edition approved Oct. 1, 2009Oct. 1, 2014. Published December 2009October 20014. Originally approved in 2005. Last previous edition approved in 20052009as A1043/A1043M 05.A1043/A1043M 05 (2009). DOI: 10.1520/A1043_A1043M-05R09.10.1520/A1043_A1043M-14.2 For refe
13、rencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide t
14、he user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the stand
15、ard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.3 The maximum permissible carbon equivalent values s
16、hall be:Grade Thickness of Plateand Shape Flange CE 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 heat analysis. The required chemical analysis as well as the carbonequivalent shall be reported. The carbon equivalent s
17、hall be calculated using the following formula:CE5C1Mn!/61Cr1Mo1V!/51Ni1Cu!/15 (1)6. Tensile Requirements6.1 The product as represented by the test specimens shall conform to the requirements for tensile properties given in Table 2.7. Charpy Impact Requirements7.1 Charpy V-notch tests shall be condu
18、cted in accordance with Specification A673/A673M, frequency H. The test results forfull-size test specimens shall conform to the following minimum average value for Grades 36 250 and 50 345:40 ftlbf 54 J# at 70F 21C#or a lower test temperature as specified in the purchase order.7.2 For shapes with a
19、 flange thickness equal to or greater than 112 in. 38.1 mm the test specimens shall be taken from theAlternate Core Location as defined in Specification A673/A673M.8. Keywords8.1 building framing; low yield to tensile ratio; plates; shapes; structural steel; welded constructionTABLE 1 Chemical Requi
20、rements (Heat Analysis)colname=“col2“ colwidth=“1.64in“ colname=“col3“colwidth=“0.50in“ colname=“col4“ colwidth=“0.52in“Composition, %Element Grade36 250Grade50 345Carbon, max 2 in. 50 mm andless in thickness0.20 0.20Over 2 in. 50mm in thickness0.22 0.22Manganese 0.501.40 0.501.60Phosphorus, max 0.0
21、35 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 0.15A 0.15AColumbium, max 0.05A 0.05ATitanium, max 0.03 0.03TABLE 1 Chemical Requirements (Heat Analysis)ElementCompos
22、ition, %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 0.030 0.030Sulfur, max 0.030 0.030Silicon, max 0.35 0.55Nitrogen, max 0.012 0.012Nickel, max 0.45 0.45Chromium, max 0.35 0.35Molybden
23、um, max 0.15 0.15Copper, max 0.50 0.50Vanadium, max 0.15A 0.15AColumbium, max 0.05A 0.05ATitanium, max 0.03 0.03A The sum of columbium and vanadium shall not exceed 0.15 %.A1043/A1043M 142SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order or c
24、ontract.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. Product Analysis, andS8. Ultrasonic Examination.ADDITIONAL SUPPLEME
25、NTARY REQUIREMENTSIn addition, the following optional supplementary requirements are suitable for use with thisspecification.S71. Through-thickness Tension TestsS71.1 Through-thickness tension test shall be made in accordance with the requirements of Specification A770/A770M exceptfor test frequency
26、. The test frequency shall be the same as the tension test frequency.S72. Pcm Carbon Equivalent LimitS72.1 The Pcm carbon equivalent for each heat, based upon heat analysis, shall not exceed 0.26 % for grade 36 250 or 0.29 %for Grade 50 345, calculated using the following formula:Pcm = C + Si/30 + (
27、Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B %S73. Grade 50 Plates Restricted Carbon Equivalent LimitS73.1 The plates shall be produced by the thermo-mechanical control process (TMCP) or shall be quenched and tempered.S73.2 The carbon equivalent for each heat, based upon heat analysis, shall not exc
28、eed 0.38 % for plates 2 in. 50 mm or underin thickness and 0.40 % for plates over 2 in. 50 mm in thickness, calculated using the following formula:CE = C + Mn/6 + (Cr + Mo + V)/5 + (Cu + Ni)/15 %TABLE 2 Tensile RequirementsAGrade36 250 50 345Tensile strength, min, ksi MPa 58 400 65 450Yield point, k
29、si MPa 36 to 52250 to 36050 to 65345 to 450Yield to tensile ratio, max 0.80 0.80Elongation in 8 in. 200 mm, min %B 20 18Elongation in 2 in. 50 mm, min %B 23 21A See Specimen Orientation under the Tension Tests section of SpecificationA6/A6M.B For plates wider than 24 in. 600 mm the elongation requir
30、ement is reduced twopercentage points. See Elongation Requirement Adjustments in the Tension Testssection of Specification A6/A6M.A1043/A1043M 143S73.3 For plates produced by the thermo-mechanical control process, in addition to the marking required by SpecificationA6/A6M, the letters “TMC” shall be
31、 marked following the specification designation mark.S74. Grade 50 Plates Restricted Pcm Carbon Equivalent LimitS74.1 The plates shall be produced by the thermo-mechanical control process (TMCP) or shall be quenched and tempered.S74.2 The Pcm carbon equivalent for each heat, based upon heat analysis
32、, shall not exceed 0.24 % for plates 2 in. 50 mm orunder in thickness and 0.26 % for plates over 2 in. 50 mm in 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 control process, in ad
33、dition to the marking required by SpecificationA6/A6M, the letters “TMC” shall be marked following the specification designation mark.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A1043/A1043M 05 (2009) that may impact the use o
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