1、Designation: A302/A302M 12A302/A302M 17Standard Specification forPressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel1This standard is issued under the fixed designation A302/A302M; the number immediately following the designation indicates the yearof original ad
2、option 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.This standard has been approved for use by agencies of the U.S. Department of Defe
3、nse.1. Scope*1.1 This specification2 covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intendedparticularly for welded boilers and other pressure vessels.1.2 Plates under this specification are available in four grades having different strength levels as follows:Grade Te
4、nsile Strength,ksi MPa TypeA 7595 515655 manganese-molybdenumB 80100 550690 manganese-molybdenumC 80100 550690 manganese-molybdenum-nickelD 80100 550690 manganese-molybdenum-nickel1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specifiedmec
5、hanical property requirements. The minimum thickness is limited to 0.25 in. 6.5 mm.1.4 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; t
6、herefore, each system must be usedindependently of the other. Combining values from the two systems may result in nonconformance with the specification.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision
7、 on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
8、A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel PlatesA577/A577M Specification 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
9、Ordering Information3.1 Material supplied to this material specification shall conform to Specification A20/A20M. These requirements outline thetesting and retesting methods and procedures, permitted variations in dimensions, and mass, quality and repair of defects, marking,loading, and ordering inf
10、ormation.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 use requirements. The purchaser is referred to the listed supplementaryrequirements in this specification
11、 and to the detailed requirements in Specification A20/A20M.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.11on Steel Plates for Boilers and Pressure Vessels.Current edition approved
12、 May 1, 2012Nov. 1, 2017. Published June 2012November 2017. Originally approved in 1947. Last previous edition approved in 20072012 asA302/A302M 03 (2007).A302/A302M 12. DOI: 10.1520/A0302_A0302M-12.10.1520/A0302_A0302M-17.2 For ASME Boiler and Pressure Vessel Code applications, see related Specific
13、ation SA-302/SA-302M in Section II of that Code.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandardsvolume information, refer to the standards Document Summary page on the ASTM website.This docume
14、nt 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 changes accurately, ASTM recommends that users consult prior editions as ap
15、propriate. 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 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United S
16、tates13.3 Coils are excluded from qualification to this specification until they are processed into finished plates. Plates produced fromcoil means plates that have been cut to individual lengths from coil. The processor directly controls, or is responsible for, theoperations involved in the process
17、ing 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, and certification.NOTE 1For plates produced from coil and furnished without heat treatment or
18、 with stress relieving only, three test results are reported for eachqualifying coil. Additional requirements regarding plates from coil are described in Specification A20/A20M.3.4 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirem
19、entsof this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed and shall conform to the fine grain size requirement of SpecificationA20/A20M.5. Heat Treatment5.1 Plates 2 in. 50 mm and under in thickness are normally supplied in the as-rolled co
20、ndition. Plates may be orderednormalized, normalized and tempered, or stress relieved, or both. relieved.5.2 Plates over 2 in. 50 mm in thickness shall be normalized. normalized or normalized and tempered.5.3 When normalizing plates 4 in. 100 mm or over in thickness, the cooling rate may be accelera
21、ted by air blasting or liquidquenching followed by tempering in the temperature range from 1100 to 1300F 595 to 705C to obtain mechanical propertiescomparable to those developed by normalizing plates in the lesser thicknesses.5.4 If approved by the purchaser, for plates less than 4 in. 100 mm in thi
22、ckness, cooling rates faster than those obtained bycooling in air are permissible for improvement of toughness, provided the plates are subsequently tempered in the temperaturerange from 1100 to 1300F 595 to 705C.6. Chemical Composition6.1 The steel shall conform to the chemical requirements shown i
23、n Table 1 unless otherwise modified in accordance withSupplementary Requirement S17, Vacuum Carbon-Deoxidized Steel, in Specification A20/A20M.7. Mechanical Properties7.1 Tension Test RequirementsThe plates, as represented by the tension test specimens, shall conform to the requirementsgiven in Tabl
24、e 2.7.1.1 For accelerated cooled plates with a nominal thickness of 34 in. 20 mm or less, the 112-in. 40-mm wide rectangularspecimen may be used for the tension test, and the elongation may be determined in a 2-in. 50-mm gage length that includes thefracture and that shows the greatest elongation.TA
25、BLE 1 Chemical RequirementsNOTE 1Where “” appears, there is no requirement.Elements Composition, %Grade A Grade B Grade C Grade DCarbon, max:AUp to 1 in. 25 mm, incl, in thickness 0.20 0.20 0.20 0.20Over 1 to 2 in. 50 mm, incl 0.23 0.23 0.23 0.23Over 2 in. 50 mm in thickness 0.25 0.25 0.25 0.25Manga
26、nese:Heat analysis 0.951.30 1.151.50 1.151.50 1.151.50Product analysis 0.871.41 1.071.62 1.071.62 1.071.62Phosphorus, maxA 0.025 0.025 0.025 0.025Sulfur, maxA 0.025 0.025 0.025 0.025Silicon:Heat analysis 0.150.40 0.150.40 0.150.40 0.150.40Product analysis 0.130.45 0.130.45 0.130.45 0.130.45Molybdenu
27、m:Heat analysis 0.450.60 0.450.60 0.450.60 0.450.60Product analysis 0.410.64 0.410.64 0.410.64 0.410.64Nickel:Heat analysis . . 0.400.70 0.701.00Product analysis . . 0.370.73 0.671.03A Applies to both heat and product analyses.A302/A302M 1728. Keywords8.1 alloy steel plate; pressure containing parts
28、; pressure vessel steels; steel plates; steel plates for pressure vessel applicationsSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order. A list ofstandardized supplementary requirements for use at the option of the purchaser is included inSpec
29、ification A20/A20M. Those that are considered suitable for use with this specification are listedbelow by title.S1. Vacuum 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
30、 (for Material 0.625 in. 16 mm and over in Thickness),S7. High-Temperature Tension Test,S8. Ultrasonic Examination in accordance with Specification A435/A435M,S9. Magnetic Particle Examination,S11. Ultrasonic Examination in accordance with Specification A577/A577M,S12. Ultrasonic Examination in acco
31、rdance with Specification A578/A578M, andS17. Vacuum Carbon-Deoxidized Steel.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A302/A302M 03 (2007)A302/A302M 12) that may impact the use of this standard. (Approved May 1,2012Nov. 1,
32、2017.)(1) Table 1 and Revised 5.31.3 were revised.to remove minimum thickness.(2) SectionRevised 35.1 was editoriallyand 5.2 revised.to allow for tempering.(3) Added Note 1 to Table 1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any it
33、em mentionedin 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 com
34、mittee 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 m
35、eeting 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
36、, 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
37、). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Tensile RequirementsGrade A Grade B Grade C Grade DTensile strength, ksi MPa 7595 515655 80100 550690 80100 550690 80100 550690Yield strength, min, ksi MPa 45 310 50 345 50 345 50 345Elongation in 8 in. 200 mm, min, %A 15 15 17 17Elongation in 2 in. 50 mm, min, %A 19 18 20 20A See Specification A20/A20M for elongation adjustment.A302/A302M 173
