1、Designation: A724/A724M 09 (Reapproved 2018)Standard Specification forPressure Vessel Plates, Carbon-Manganese-Silicon Steel,Quenched and Tempered, for Welded Pressure Vessels1This standard is issued under the fixed designation A724/A724M; the number immediately following the designation indicates t
2、he yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification2covers three grades of carbon-
3、manganese-silicon steel, designated Grades A, B, and C. GradeC may be produced with a boron addition. The plates arequenched and tempered and are intended for welded-layeredpressure vessels.1.2 The maximum thickness of plates supplied under thisspecification is limited only by the capability of the
4、chemicalcomposition to meet the specified mechanical requirements.However, current practice normally limits the maximum thick-ness to78 in. 22 mm for GradesAand B, and to 2 in. 50 mmfor Grade C.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Wit
5、hin the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.4 This international standard was dev
6、eloped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Do
7、cuments2.1 ASTM Standards:3A20/A20M Specification for General Requirements for SteelPlates for Pressure Vessels3. General Requirements and Ordering Information3.1 Material supplied to this material specification shallconform to Specification A20/A20M. These requirements out-line the testing and rete
8、sting methods and procedures, permit-ted variations in dimensions and weight, quality and repair ofdefects, marking, loading, and ordering information.3.2 In addition to the basic requirements of thisspecification, certain supplementary requirements are availablewhen additional control, testing, or
9、examination is required tomeet end use requirements. The purchaser is referred to thelisted supplementary requirements in this specification and tothe detailed requirements in Specification A20/A20M.3.3 If the requirements of this specification are in conflictwith the requirements of Specification A
10、20/A20M, the require-ments of this specification shall prevail.4. Manufacture4.1 Steelmaking ProcessThe steel shall be killed and shallconform to the fine austenitic grain size requirement ofSpecification A20/A20M.5. Heat Treatment5.1 All plates shall be quenched from a temperature in therange from
11、1600 to 1700F 870 to 925C. Grades A and Bshall then be tempered at not less than 1100F 595C, andGrade C shall then be tempered at not less than 1150F620C. The tempering soaking time shall be not less than12 h.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical compos
12、ition prescribed in Table 1.7. Mechanical Properties7.1 Tension Test Requirements:7.1.1 The material as represented by the tension test speci-mens shall conform to the requirements given in Table 2.7.1.2 For nominal plate thicknesses of34 in. 20 mm andunder, the 112-in. 40-mm wide rectangular specim
13、en may beused for the tension test, and the elongation may be determinedin a 2-in. 50-mm gage length that includes the fracture andshows the greatest elongation.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsib
14、ility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 1975. Last previous edition approved in 2013 as A724/A724M 09(2013). DOI: 10.1520/A0724_A0724M-09R18.2For ASME Boiler and Pressure Vess
15、el Code applications, see related Specifi-cation SA-724/SA-724M in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Su
16、mmary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principl
17、es for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.18. Keywords8.1 alloy steel; alloy steel plate; pressure containing parts;pressure vessel steels; steel plates; steel plates for pressureves
18、selsSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.A list of standardized supplementary requirements for use at the option of the purchaser is includedin Specification A20/A20M. Several of those that are considered suitable for use with thisspecifi
19、cation are listed by title. Other tests may be performed by agreement between the supplier andthe purchaser.S1. Vacuum Treatment,S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S5. Charpy V-Notch Impact Test,S7. High-Temperature Tension Test,S8. Ultrasonic Exami
20、nation, andS9. Magnetic Particle Examination.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, an
21、d 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, either reapproved or withdrawn. Your comments are invited either for revisi
22、on 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 attend. If you feel that your comments have not received a fair hearing you sh
23、ouldmake 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. Individual reprints (single or multiple copies) of this standard may be obt
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25、23, Tel: (978) 646-2600; http:/ 1 Chemical RequirementsNOTE 1Where “” appears in this table, there is no requirement.ElementComposition, %Grade A Grade B Grade CCarbon, max:Heat analysis 0.18 0.20 0.22Product analysis 0.22 0.24 0.26Manganese:Heat analysis 1.001.60 1.001.60 1.101.60Product analysis 0
26、.921.72 0.921.72 1.021.72Phosphorus, maxA0.025 0.025 0.025Sulfur, maxA0.025 0.025 0.025Silicon, max:Heat analysis 0.55 0.50 0.200.60Product analysis 0.60 0.55 0.180.65Copper, max:BHeat analysis 0.35 0.35 0.35Product analysis 0.38 0.38 0.38Nickel, max:BHeat analysis 0.25 0.25 0.25Product analysis 0.2
27、8 0.28 0.28Chromium, max:BHeat analysis 0.25 0.25 0.25Product analysis 0.29 0.29 0.29Molybdenum, max:BHeat analysis 0.08 0.08 0.08Product analysis 0.09 0.09 0.09Vanadium, max:BHeat analysis 0.08 0.08 0.08Product analysis 0.09 0.09 0.09Boron, max . . . . . . 0.005CAApplies to both heat and product an
28、alyses.BWhen analysis shows that the amount of an element is 0.02 % or lower, the valuemay be reported as 0.02 %.CIf boron is less than 0.001 %, the analysis report for the element may be statedas “0.001.”TABLE 2 Tensile RequirementsGrades A and C,ksi MPaGrade B,ksi MPaTensile strength 90110 620760 95115 655795Yield strength, min 70 485 75 515Elongation in 2 in. 50 mm,min, %A,B19 17ASee Specification A20/A20M for elongation adjustment.BSee 7.1.2.A724/A724M 09 (2018)2
