1、Designation: A1077/A1077M 12Standard Specification forStructural Steel with Improved Yield Strength at HighTemperature for Use in Buildings1This standard is issued under the fixed designation A1077/A1077M; the number immediately following the designation indicates theyear of original adoption or, in
2、 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 alloy steel in bars, plates up toand including 4 in. 100
3、mm in thickness and shapes ofstructural quality with improved yield strength at high tem-perature. Two grades, 36 250 and 50 345 are available foruse in bolted or welded buildings or for general structuralpurposes. Class 2 requires a maximum yield to tensile ratio this ratio is not required for Clas
4、s 1.1.2 When the steel is to be welded, a welding proceduresuitable for the grade of steel and intended use or service is tobe utilized. See Appendix X3 of Specification A6/A6M forinformation on weldability.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as
5、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, without combining valuesin any way.1.4 The text of this specification contains notes or footnotes,or both, that pro
6、vide explanatory material. Such notes andfootnotes, excluding those in tables and figures, do not containany mandatory requirements.1.5 For structural products produced from coil and fur-nished without heat treatment or with stress relieving only, theadditional requirements, including additional tes
7、ting require-ments and the reporting of additional test results, of Specifi-cation A6/A6M apply.1.6 Supplementary requirements are provided for use whereadditional testing or additional restrictions are required by thepurchaser. Such requirements apply only when specified in thepurchase order.2. Ref
8、erenced 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 Procedure forImpact Testing of Structural
9、 SteelA770/A770M Specification for Through-Thickness TensionTesting of Steel Plates for Special ApplicationsE8 Test Methods for Tension Testing of Metallic MaterialsE21 Test Methods for Elevated Temperature Tension Testsof Metallic Materials3. General Requirements for Delivery3.1 Products furnished
10、under this specification shall con-form to the requirements of the current edition of SpecificationA6/A6M, for the specific structural product ordered, unless aconflict exists in which case this specification shall prevail.3.2 Coils are excluded from qualification to this specifica-tion until they a
11、re processed into a finished structural product.Structural products produced from coil means structural prod-ucts that have been cut to individual lengths from a coil. Theprocessor directly controls, or is responsible for, the operationsinvolved in the processing of a coil into a finished structural
12、product. Such operations include decoiling, leveling orstraightening, hot-forming or cold-forming (if applicable),cutting to length, testing, inspection, conditioning, heat treat-ment (if applicable), packaging, marking, loading for shipment,and certification.NOTE 1For structural products produced f
13、rom coil and furnishedwithout heat treatment or with stress relieving only, two test results are to1This 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, B
14、uildings, Rolling Stock and Ships.Current edition approved March 1, 2012. Published March 2012. DOI: 10.1520/A1077_A1077M-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information,
15、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.be reported for each qualifying coil. Additional requirements regardingstructural products produced from coil are describ
16、ed in SpecificationA6/A6M.4. Materials and Manufacture4.1 The steel shall be killed, and this shall be confirmed byone of the following statements: (1) killed steel,(2) the siliconcontent is 0.10 % or more, (3) the total aluminum content is0.015 % or more, or (4) the titanium content is 0.006 % ormo
17、re.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 product analysistolerances in Specification A6/A6M.5.3 The maximum permissible Pcm carbon equivalent v
18、al-ues shall be:Grade Pcm Value max %36 250 0.2650 345 0.295.3.1 The Pcm Carbon equivalent value shall be based uponheat analysis. The required chemical analysis as well as thePcm carbon equivalent shall be reported. The Pcm carbonequivalent shall be calculated using the following equation:Pcm 5 C 5
19、Si301Mn 1 Cu 1 Cr!201Ni601Mo151V101 5B % (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 accordancewith Specification A67
20、3/A673M, frequency H. The test resultsfor full-size test specimen shall conform to the followingminimum average value for Grade 36 250 and 50 345:7.1.1 20 ft lbf 27 J at 32F 0C8. Elevated Temperature Tension Test for Yield8.1 Conduct the elevated-temperature tensile test at 1110F600C.8.1.1 The test
21、results of 0.2 % offset yield strength shallconform to the following values for Grade 36 250 and 50345:8.1.1.1 Grade 36 250: minimum 24 ksi 165 MPa8.1.1.2 Grade 50 345: minimum 33 ksi 230 MPa8.2 The elevated-temperature strength of the steel shall bedetermined by an elevated-temperature tensile test
22、 that con-forms to Test Method E21.8.3 Sampling:8.3.1 Conform to the relevant section of Specification A6/A6M, except that full-section specimens need not be used.8.3.2 The elevated-temperature test specimen shall be takenfrom the same area in the plate or shape and have the sameorientation as the s
23、pecimen used to determine room-temperature properties.8.4 Frequency:8.4.1 Test one specimen per heat from the largest thicknessin the heat.8.5 Specimen Geometry:8.5.1 Standard round and flat sheet-type specimens areacceptable. In particular, specimens allowed are identified inTest Methods A370, Figu
24、re 4, and Test Methods E8, Figures 1,7, or 8. Other acceptable specimens that meet the requirementsof 8.5.2 are identified in Test Method E21, Section 7.8.5.2 The diameter, for round specimens, or smaller gaugedimension, for sheet or plate specimens, shall be at least 0.250in. 6 mm or the largest si
25、ze allowed by the thickness of theproduct, except that the diameter need not be greater than 0.500in. 12.7 mm.8.6 Testing:8.6.1 Conduct the elevated-temperature tensile test accord-ing to Test Method E21.8.6.2 Any control mode, such as position control, loadcontrol, or strain control, is acceptable
26、as long as strain ratelimits are followed.8.6.3 The test may be terminated after the yield strength isdetermined and before the specimen fails.8.7 Report:8.7.1 Report the 0.2 % offset yield strength (YS 0.2 %offset) at 1110F 600C as required by Test Method E21.9. Keywords9.1 bars; bolted constructio
27、n; buildings; carbon steel; highstrength low-alloy; plates; shapes; structural steel; weldedconstructionTABLE 1 Chemical Requirement (Heat Analysis)ElementComposition, %Grade36 250Grade50 345Carbon, max 0.15 0.15Manganese 0.50 1.40 0.50 1.60Phosphorus, max 0.035 0.035Sulfur, max 0.035 0.035Silicon,
28、max 0.35 0.55Nickel, max 0.50 0.50Chromium, max 1.00 1.00Molybdenum 0.20 0.70 0.20 0.90Copper, max 0.50 0.50Vanadium, max 0.15 0.15Columbium, max 0.05 0.05Titanium, max 0.03 0.03Boron, max 0.002 0.002A1077/A1077M 122SUPPLEMENTARY REQUIREMENTSS1. Vacuum TreatmentS2. Product AnalysisS8. Ultrasonic Exa
29、minationADDITIONAL SUPPLEMENTARY REQUIREMENTSS71. 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 test frequency.ASTM Interna
30、tional 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 rights, are entirely th
31、eir 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 standardsand should
32、 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 Committee on Standa
33、rds, 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 610-83
34、2-9585 (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/).TABLE 2 Tensile RequirementsNOTE 1Where “” appears in this table, there is no re
35、quirement.NOTE 2See Specimen Orientation under the Tension Tests section of Specification A6/A6M.Grade36 250 50 345Class 1 Class 2 Class 3 Class 4Tensile strength, ksi MPa, min 58 400 58 400 65 450 65 450Yield point, ksi MPa 36 250 min 36 250 52 360 50 345 min 50 345 65 450Yield to tensile ratio, ma
36、x 0.80 0.80Elongation in 8 in. 200 mm, min %A20 20 18 18Elongation in 2 in. 50 mm, min %A23 23 21 21AFor plates wider than 24 in. 600 mm the elongation requirement is reduced two percentage points. See elongation requirement adjustments in the Tension Testssection of Specification A6/A6M.A1077/A1077M 123
