1、Designation: A 724/A 724M 04Standard Specification forPressure Vessel Plates, Carbon-Manganese-Silicon Steel,Quenched and Tempered, for Welded Pressure Vessels1This standard is issued under the fixed designation A 724/A 724M; the number immediately following the designation indicates the yearof orig
2、inal 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2covers three grades of carbon-manganese-si
3、licon 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 chemicalcomp
4、osition 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
5、, 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.2. Referenced Documents2.1 ASTM Standards:3A 20/A 2
6、0M Specification for General Requirements forSteel Plates for Pressure Vessels3. General Requirements and Ordering Information3.1 Material supplied to this material specification shallconform to Specification A 20/A 20M. These requirementsoutline the testing and retesting methods and procedures,perm
7、issible variations in dimensions and weight, quality andrepair of defects, marking, loading, etc.3.2 Specification A 20/A 20M also establishes the rules forthe ordering information that should be complied with whenpurchasing material to this specification.3.3 In addition to the basic requirements of
8、 this specifica-tion, certain supplementary requirements are available whenadditional control, testing, or examination is required to meetend use requirements. These include:3.3.1 Vacuum treatment,3.3.2 Additional or special tension testing,3.3.3 Impact testing, and3.3.4 Nondestructive examination.3
9、.4 The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed require-ments in Specification A 20/A 20M.3.5 If the requirements of this specification are in conflictwith the requirements of Specification A 20/A 20M, the re-quirements of this specifica
10、tion shall prevail.4. Manufacture4.1 Steelmaking ProcessThe steel shall be killed and shallconform to the fine austenitic grain size requirement ofSpecification A 20/A 20M.5. Heat Treatment5.1 All plates shall be quenched from a temperature in therange from 1600 to 1700F 870 to 925C. Grades A and Bs
11、hall 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 1.1This specifica
12、tion is under the jurisdiction 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 July 1, 2004. Published July 2004. Originally approvedin 1975. Last previo
13、us edition approved in 1999 as A 724/A 724M99.2For 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.org. For Ann
14、ual 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.7. Mechan
15、ical 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, a
16、nd the elongation may be determinedin a 2-in. 50-mm gage length that includes the fracture andshows the greatest elongation.SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.A list of standardized supplementary requirements for use at the option of th
17、e purchaser is includedin Specification A 20/A 20M. Several of those that are considered suitable for use with thisspecification 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
18、 Treatment of MechanicalTest Coupons,S5. Charpy V-Notch Impact Test,S7. High-Temperature Tension Test,S8. Ultrasonic Examination,S9. Magnetic Particle Examination, andSUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A 724/A 724M99)
19、 that may impact the use of this standard.(1) Title was revised. (2) Section 7.1.2 was revised.TABLE 1 Chemical RequirementsElementComposition, %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 ana
20、lysis 0.921.72 0.921.72 1.021.72Phosphorus, maxA0.035 0.035 0.035Sulfur, maxA0.035 0.035 0.035Silicon, 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 analy
21、sis 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 heat and pro
22、duct 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 strength 90110
23、620760 95115 655795Yield strength, min 70 485 75 515Elongation in 2 in. 50 mm,min, %A,B19 17ASee Specification A 20/A 20M for elongation adjustment.BSee 7.1.2.A 724/A 724M 042ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentio
24、nedin 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 their own responsibility.This standard is subject to revision at any time by the responsible technical committee an
25、d 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 be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting o
26、f 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 Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box
27、 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).A 724/A 724M 043
