1、Designation:A204/A204M03(Reapproved2007) Designation: A204/A204M 12Standard Specification forPressure Vessel Plates, Alloy Steel, Molybdenum1This standard is issued under the fixed designation A204/A204M; the number immediately following the designation indicates the yearof original adoption or, in
2、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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 Th
3、is specification2covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressurevessels.1.2 Plates under this specification are available in three grades having different strength levels as follows:Grade Tensile Strength, ksi MPaA 6585 450585B 7090 485620C 7595 5156
4、551.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanicalproperty requirements; however, current practice normally limits the maximum thickness of plates furnished under thisspecification as follows:Grade Maximum Thickness, in. mmA 6 15
5、0B 6 150C 4 1001.4 The values stated in either inch-pound units or SI units are to be 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 must be usedindependently of the other. Combin
6、ing values from the two systems may result in nonconformance with this specification.1This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.11on Steel Plates for Boilers and Pressure Vessel
7、s.Current edition approved Nov.May 1, 2007.2012. Published March 2008.June 2012. Originally approved in 1937. Last previous edition approved in 20032007 asA204/A204M 03 (2007). DOI: 10.1520/A0204_A0204M-03R07.10.1520/A0204_A0204M-12.2For ASME Boiler and Pressure Vessel Code applications, see related
8、 Specification SA-204/SA 204M in Section II of that Code.1This 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 adequately depict all change
9、s 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 standard.Copyright ASTM International, 100 Barr
10、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements for Steel Plates for Pressure VesselsA435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel PlatesA577/A577M Spec
11、ification for Ultrasonic Angle-Beam Examination of Steel PlatesA578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications3. General Requirements and Ordering Information3.1Plates3.1 Material supplied to this productmaterial specification shall c
12、onform to Specification A20/A20M, which outlinesthe testing and retesting methods and procedures, permissible variations in dimensions and mass, quality and repair of defects,marking, loading, etc.3.2Specification . These requirements outline the testing and retesting methods and procedures, permitt
13、ed variations indimensions, and mass, quality and repair of defects, marking, loading, and ordering information.3.2 In addition to the basic requirements of this specification, certain supplementary requirements are available when additionalcontrol, testing, or examination is required to meet end us
14、e requirements. The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed requirements in SpecificationA20/A20Malso establishes the rules for orderinginformation that should be complied with when purchasing plates to this specification.3.3In addition
15、 to the basic requirements of this specification, certain supplementary requirements are available where additionalcontrol, testing, or examination is required to meet end use requirements.3.4The purchaser is referred to the listed supplementary requirements in this specification and to the detailed
16、 requirements inSpecification A20/A20M.3.5Coils3.3 Coils are excluded from qualification to this specification until they are processed into finished plates. Platesproduced from coil means plates that have been cut to individual lengths from coil. The processor directly controls, or isresponsible fo
17、r, the operations involved in the processing of coils into finished plates. Such operations include decoiling, leveling,cutting to length, testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, andcertification.NOTE 1For plates produced from coil
18、 and furnished without heat treatment or with stress relieving only, three test results are reported for eachqualifying coil. Additional requirements regarding plates from coil are described in Specification A20/A20M.3.6If3.4 If the requirements of this specification are in conflict with the require
19、ments of Specification A20/A20M, therequirements of this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed.5. Heat Treatment5.1 Plates 112 in. 40 mm and under in thickness are normally supplied in the as-rolled condition. The plates may be orde
20、rednormalized or stress relieved or both.5.2 Plates over 112 in. 40 mm in thickness shall be normalized.6. Chemical Requirements6.1 The steel shall conform to the chemical requirements given in Table 1unless otherwise modified in accordance withSupplementary Requirement S17, Vacuum Carbon-Deoxidized
21、 Steel, in Specification A20/A20M.7. Mechanical Requirements7.1 Tension Test RequirementsThe plates, as represented by the tension-test specimens, shall conform to the requirementsgiven in Table 2.3For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service
22、at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.A204/A204M 122.8. Keywords8.1 alloy steel plate; molybdenum-alloy; pressure containing parts; pressure vessel steel plateSUPPLEMENTARY REQUIREMENTSSupplementary r
23、equirements shall not apply unless specified in the purchase order.A list of standardized supplementary requirements for use at the option of the purchaser is includedin SpecificationA20/A20M. Those that are considered suitable for use with this specification are listedin this section by title.S1. V
24、acuum Treatment,S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of Mechanical Test Coupons,S4.1 Additional Tension Test,S5. Charpy V-Notch Impact Test,S6. Drop Weight Test (for Material 0.625 in. 16 mm and over in Thickness),S7. High-Temperature Tension Test,S8. Ultrasonic Examination in
25、 accordance with Specification A435/A435M,S9. Magnetic Particle Examination,S11. Ultrasonic Examination in accordance with Specification A577/A577M,S12. Ultrasonic Examination in accordance with Specification A578/A578M, andS17. Vacuum Carbon-Deoxidized Steel.SUMMARY OF CHANGESCommittee A01 has iden
26、tified the location of selected changes to this standard since the last issueTABLE 1 Chemical RequirementsElementComposition, %Grade A Grade B Grade CCarbon, max:AUp to 1 in. 25 mmincl, in thickness0.18 0.20 0.23Over 1 in. to 2 in. 50 mmincl, in thickness0.21 0.23 0.26Over 2 in. to 4 in. 100 mmincl,
27、 in thickness0.23 0.25 0.28Over 4 in. 100 mmin thickness0.25 0.27 0.28Manganese, max:Heat analysis 0.90 0.90 0.90Product analysis 0.98 0.98 0.98Phosphorous, maxA0.035 0.035 0.035Phosphorous, maxA0.025 0.025 0.025Sulfur, maxA0.035 0.035 0.035Sulfur, maxA0.025 0.025 0.025Silicon:Heat analysis 0.150.40
28、 0.150.40 0.150.40Product analysis 0.130.45 0.130.45 0.130.45Molybdenum:Heat analysis 0.450.60 0.450.60 0.450.60Product analysis 0.410.64 0.410.64 0.410.64AApplies to both heat and product analyses.TABLE 2 Tensile RequirementsGrade A Grade B Grade Cksi MPa ksi MPa ksi MPaTensile strength 6585 450585
29、 7090 485620 7595 515655Yield strength, minA37 255 40 275 43 295Elongation in 8 in. 200 mm, min, %B19 17 16Elongation in 2 in. 50 mm, min, %B23 21 20ADetermined by either the 0.2 % offset method or the 0.5 % extension-under-load method.BSee Specification A20/A20M for elongation adjustment.A204/A204M
30、 123(A204/A204M93(1999) that may impact the use of this standard.(1) Added 3.5 and Note 1 to be consistent with the terminology and requirements of Specification A20/A20M.(2) 3.3 was revised to be more general.Committee A01 has identified the location of selected changes to this standard since the l
31、ast issue(A204/A204M 03 (2007) that may impact the use of this standard. (Approved May 1, 2012.)(1) Table 1 was revised.(2) Section 3 was editorial revised.(3) Section 8 was added.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item m
32、entionedin 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 committ
33、ee 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 be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meet
34、ing 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 Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, P
35、O 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/).A204/A204M 124
