1、Designation: A724/A724M 09Standard 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 the yearof original
2、 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. Scope*1.1 This specification2covers three grades of carbon-manganese-silicon
3、 steel, designated GradesA, 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 chemicalcompositio
4、n 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. Within the text, theS
5、I 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.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Speci
6、fication for General Requirements forSteel Plates 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 retesting methods and procedures, permit-ted
7、variations in dimensions and weight, quality and repair ofdefects, marking, loading, and ordering information.3.2 In addition to the basic requirements of this specifica-tion, certain supplementary requirements are available whenadditional control, testing, or examination is required to meetend use
8、requirements. The purchaser is referred to the listedsupplementary requirements in this specification and to thedetailed requirements in Specification A20/A20M.3.3 If the requirements of this specification are in conflictwith the requirements of Specification A20/A20M, the require-ments of this spec
9、ification 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 1600 to 1700F 870 to 925C. Grades A and
10、 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 than12h.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1.7. Mechanica
11、l 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 specimen may beused for the tension test, and
12、the elongation may be determinedin a 2-in. 50-mm gage length that includes the fracture andshows the greatest elongation.8. Keywords8.1 alloy steel; alloy steel plate; pressure containing parts;pressure vessel steels; steel plates; steel plates for pressurevessels1This specification is under the jur
13、isdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Oct. 1, 2009. Published October 2009. Originallyapproved in 1975. Last previous edition approve
14、d in 2004 as A724/A724M 04.DOI: 10.1520/A0724_A0724M-09.2For ASME Boiler and Pressure Vessel 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.or
15、g. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States
16、.SUPPLEMENTARY 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 SpecificationA20/A20M. Several of those that are considered suitable for use with this specificat
17、ionare listed by title. Other tests may be performed by agreement between the supplier and the 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 Examinat
18、ion, andS9. Magnetic Particle Examination.TABLE 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 1.101.60Pr
19、oduct analysis 0.921.72 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 0.25Prod
20、uct analysis 0.28 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 hea
21、t and product analyses.BWhen analysis shows that the amount of an element is 0.02 % or lower, thevalue may 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 streng
22、th 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 092SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A7
23、24/A724M 04) that may impact the use of this standard. (Approved Oct. 1, 2009.)(1) 3.2 and 3.4 deleted and content incorporated into 3.1 and3.2, respectively. 3.3.13.3.4 deleted as unnecessary. Sectionparagraphs subsequently renumbered.(2) Table 1 changed to reflect current modern melting prac-tices
24、. Note 1 added on use of ellipses.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, and the risko
25、f 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 revision of this
26、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 shouldmake yo
27、ur 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 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/).A724/A724M 093
