1、Designation: A1077/A1077M 12A1077/A1077M 14Standard 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
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 alloy steel in bars, plates up to a
3、nd including 4 in. 100 mm in thickness and shapes of structuralquality with improved yield strength at high temperature. Two grades, 36 250 and 50 345 are available for use in bolted orwelded buildings or for general structural purposes. Class 2 requires a maximum yield to tensile ratio this ratio i
4、s not requiredfor Class 1.1.2 When the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service is to beutilized. See Appendix X3 of Specification A6/A6M for information on weldability.1.3 The values stated in either inch-pound units or SI units are to b
5、e 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 be usedindependently of the other, without combining values in any way.1.4 The text of this specification contains notes or
6、footnotes, or both, that provide explanatory material. Such notes andfootnotes, excluding those in tables and figures, do not contain any mandatory requirements.1.5 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additionalrequiremen
7、ts, including additional testing requirements and the reporting of additional test results, of Specification A6/A6M apply.1.6 Supplementary requirements are provided for use where additional testing or additional restrictions are required by thepurchaser. Such requirements apply only when specified
8、in the purchase order.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 ProductsA673/A673M Specification for Sampling Procedure f
9、or Impact Testing of Structural SteelA770/A770M Specification for Through-Thickness Tension Testing of Steel Plates for Special ApplicationsE8 Test Methods for Tension Testing of Metallic MaterialsE21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials3. General Requirements fo
10、r Delivery3.1 Products furnished under this specification shall conform to the requirements of the current edition of SpecificationA6/A6M, for the specific structural product ordered, unless a conflict exists in which case this specification shall prevail.3.2 Coils are excluded from qualification to
11、 this specification until they are processed into a finished structural product.Structural products produced from coil means structural products that have been cut to individual lengths from a coil. Theprocessor directly controls, or is responsible for, the operations involved in the processing of a
12、 coil into a finished structuralproduct. Such operations include decoiling, leveling or straightening, hot-forming or cold-forming (if applicable), cutting to length,testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.1 This
13、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, Buildings, Rolling Stock and Ships.Current edition approved March 1, 2012Oct. 1, 2014. Published March 2012
14、October 2014. Originally approved in 2012. Last previous edition approved in 2012 as A1077 12. DOI: 10.1520/A1077_A1077M-12.10.1520/A1077_A1077M-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standar
15、dsvolume 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 the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to
16、 adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright
17、ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1NOTE 1For structural products produced from coil and furnished without heat treatment or with stress relieving only, two test results are to be reportedfor each qualifying coil. Additional require
18、ments regarding structural products produced from coil are described in Specification A6/A6M.4. Materials and Manufacture4.1 The steel shall be killed, and this shall be confirmed by one of the following statements: (1) killed steel, (2) the siliconcontent is 0.10 % or more, (3) the total aluminum c
19、ontent is 0.015 % or more, or (4) the titanium content is 0.006 % or more.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 requirements given in Table 1, subject to the product analysis tolerancesin
20、 Specification A6/A6M.5.3 The maximum permissible Pcm carbon equivalent values shall be:Grade Pcm Value max %36 250 0.2650 345 0.295.3.1 The Pcm Carbon equivalent value shall be based upon heat analysis. The required chemical analysis as well as the Pcmcarbon equivalent shall be reported. The Pcm ca
21、rbon equivalent shall be calculated using the following equation:Pcm5C 5 Si301Mn1Cu1Cr!20 1Ni601Mo15 1V1015B % (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 Cha
22、rpy V-notch tests shall be conducted in accordance with Specification A673/A673M, frequency H. The test results forfull-size test specimen shall conform to the following minimum average value for Grade 36 250 and 50 345:7.1.1 20 ft lbf 27 J at 32F 0CTABLE 1 Chemical Requirement (Heat Analysis)colnum
23、=“2“ colwidth=“1in“ colnum=“3“ colwidth=“1in“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, 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
24、 0.50Vanadium, max 0.15 0.15Columbium, max 0.05 0.05Titanium, max 0.03 0.03Boron, max 0.002 0.002TABLE 1 Chemical Requirements (Heat Analysis)Product Shapes Plates BarsGrade 36 250 50 345 36250 50 345 36 250 50 345Carbon, max % 0.15 0.15 0.15 0.15 0.15 0.15Manganese, max % 0.50 1.40 0.50 1.40 0.50 1
25、.40 0.50 1.40 0.50 1.40 0.50 1.40Phosphorus, max % 0.035 0.035 0.030 0.030 0.035 0.035Sulfur, max % 0.035 0.035 0.030 0.030 0.035 0.035Silicon, max % 0.35 0.35 0.35 0.35 0.35 0.35Nickel, max % 0.50 0.50 0.50 0.50 0.50 0.50Chromium, max % 1.00 1.00 1.00 1.00 1.00 1.00Molybdenum % 0.20 0.70 0.20 0.70
26、0.20 0.70 0.20 0.70 0.20 0.70 0.20 0.70Copper, max % 0.50 0.50 0.50 0.50 0.50 0.50Vanadium, max % 0.15 0.15 0.15 0.15 0.15 0.15Columbium, max % 0.05 0.05 0.05 0.05 0.05 0.05Titanium, max % 0.03 0.03 0.03 0.03 0.03 0.03Boron, max % 0.002 0.002 0.002 0.002 0.002 0.002A1077/A1077M 1428. Elevated Temper
27、ature Tension Test for Yield8.1 Conduct the elevated-temperature tensile test at 1110F 600C.8.1.1 The test results of 0.2 % offset yield strength shall conform to the following values for Grade 36 250 and 50 345:8.1.1.1 Grade 36 250: minimum 24 ksi 165 MPa8.1.1.2 Grade 50 345: minimum 33 ksi 230 MPa
28、8.2 The elevated-temperature strength of the steel shall be determined by an elevated-temperature tensile test that conforms toTest 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-temperatur
29、e test specimen shall be taken from the same area in the plate or shape and have the sameorientation as the specimen used to determine room-temperature properties.8.4 Frequency:8.4.1 Test one specimen per heat from the largest thickness in the heat.8.5 Specimen Geometry:8.5.1 Standard round and flat
30、 sheet-type specimens are acceptable. In particular, specimens allowed are identified in TestMethods A370, Figure 4, and Test Methods E8, Figures 1, 7, or 8. Other acceptable specimens that meet the requirements of 8.5.2are identified in Test Method E21, Section 7.8.5.2 The diameter, for round speci
31、mens, or smaller gauge dimension, for sheet or plate specimens, shall be at least 0.250 in.6 mm or the largest size allowed by the thickness of the product, except that the diameter need not be greater than 0.500 in. 12.7mm.8.6 Testing:8.6.1 Conduct the elevated-temperature tensile test according to
32、 Test Method E21.8.6.2 Any control mode, such as position control, load control, or strain control, is acceptable as long as strain rate limits arefollowed.8.6.3 The test may be terminated after the yield strength is determined and before the specimen fails.8.7 Report:8.7.1 Report the 0.2 % offset y
33、ield strength (YS 0.2 % offset) at 1110F 600C as required by Test Method E21.9. Keywords9.1 bars; bolted construction; buildings; carbon steel; high strength low-alloy; plates; shapes; structural steel; weldedconstructionTABLE 2 Tensile RequirementsNOTE 1Where “” appears in this table, there is no r
34、equirement.NOTE 2See Specimen Orientation under the Tension Tests section of Specification A6/A6M.Grade36 250 50 345Class 1 Class 2 Class 3 Class 4Class 1 Class 2 Class 1 Class 2Tensile 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
35、65 450Yield to tensile ratio, max 0.80 0.80Elongation in 8 in. 200 mm,min %A 20 20 18 18Elongation in 2 in. 50 mm, min%A 23 23 21 21A For plates wider than 24 in. 600 mm the elongation requirement is reduced two percentage points. See elongation requirement adjustments in the Tension Tests sectionof
36、 Specification A6/A6M.A1077/A1077M 143SUPPLEMENTARY REQUIREMENTSS1. Vacuum TreatmentS2. Product AnalysisS8. Ultrasonic ExaminationADDITIONAL SUPPLEMENTARY REQUIREMENTSS71. Through-Thickness Tension TestsS71.1 Through-thickness tension test shall be made in accordance with the requirements of Specifi
37、cation A770/A770M exceptfor test frequency. The test frequency shall be the same as the tension test frequency.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue (A1077 12) that may impact the use of this standard. (Approved Oct. 1,
38、2014.)(1) Revised and expanded Table 1.(2) Corrected class references in Table 2.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 va
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