1、Designation:A302/A302M03(Reapproved2007) Designation: A302/A302M 12Standard 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 indi
2、cates the 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.This standard has been approved for use by agencies of
3、 the Department of Defense.1. Scope*1.1 This specification2covers 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 leve
4、ls as follows:GradeTensile Strength,ksi MPaTypeA 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 m
5、eet the specifiedmechanical 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
6、exact equivalents; therefore, each system must be usedindependently of the other. Combining values from the two systems may result in nonconformance with the specification.1This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the dire
7、ct responsibility of Subcommittee A01.11on Steel Plates for Boilers and Pressure Vessels.Current edition approved Nov.May 1, 2007.2012. Published March 2008.June 2012. Originally approved in 1947. Last previous edition approved in 20032007 asA302/A302M 03 (2007). DOI: 10.1520/A0302_A0302M-03R07.10.1
8、520/A0302_A0302M-12.2For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-302/SA-302M 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 prev
9、ious version. Becauseit may not be technically possible to adequately depict all changes 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 Cha
10、nges 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.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements for Steel Plates for Pressure VesselsA435/A435
11、M 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 Ordering
12、Information3.1Plates3.1 Material supplied to this productmaterial specification shall conform 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, and so forth.3.2Spec
13、ification . These requirements outline the testing and retesting methods and procedures, permitted 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 requi
14、rements 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 and to the detailed requirements in SpecificationA20/A20Malso establishes the rules for orderinginfo
15、rmation that should be complied with when purchasing plates to this specification.3.3In addition 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 purchase
16、r is referred to the listed supplementary requirements in this specification and to the detailed 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 hav
17、e been cut to individual lengths from coil. The processor directly controls, or isresponsible for, 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)
18、, packaging, marking, loading for shipment, andcertification.NOTE 1For plates produced from coil 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 Specificat
19、ion A20/A20M.3.6If3.4 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, therequirements of this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed and shall conform to the fine grain size
20、requirement of SpecificationA20/A20M.5. Heat Treatment5.1 Plates 2 in. 50 mm and under in thickness are normally supplied in the as-rolled condition. Plates may be orderednormalized or stress relieved, or both.5.2 Plates over 2 in. 50 mm in thickness shall be normalized.5.3 When normalizing plates 4
21、 in. 100 mm or over in thickness, the cooling rate may be accelerated 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 a
22、pproved by the purchaser, for plates less than 4 in. 100 mm in thickness, 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 Compositi
23、on6.1 The steel shall conform to the chemical requirements shown in 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 tens
24、ion test specimens, shall conform to the requirementsgiven in Table 2.7.1.1 For accelerated cooled plates with a nominal thickness of34 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 th
25、at includes the3For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.A302/A302M 122fracture and that shows the gr
26、eatest elongation.8. Keywords8.1 alloy steel plate; pressure containing parts; 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 supplem
27、entary requirements for use at the option of the purchaser is included inSpecification 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.
28、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 accordance with Specification A435/A435M,S9. Magnetic Particle Examination,S11. Ultrasonic Examination in
29、 accordance with Specification A577/A577M,S12. Ultrasonic Examination in accordance 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/A302M971) that may impa
30、ct the use of this standard.(1) 3.5 and Note 1 were added to be consistent with the terminology and requirements of Specification A20/A20M.TABLE 1 Chemical RequirementsElementsComposition, %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
31、 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 0.25Manganese: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, maxA0.035 0.035 0.035 0.035Phosphorus, maxA0.025 0.025 0.025 0.025Sulfur, maxA0.035 0.035
32、0.035 0.035Sulfur, maxA0.025 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 0.130.45Molybdenum: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
33、 0.701.00Product analysis . . 0.370.73 0.671.03AApplies to both heat and product analyses.TABLE 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.
34、 200 mm, min, %A15 15 17 17Elongation in 2 in. 50 mm, min, %A19 18 20 20ASee Specification A20/A20M for elongation adjustment.A302/A302M 123(2) 3.3 was revised to be more general.Committee A01 has identified the location of selected changes to this standard since the last issue(A302/A302M 03 (2007)
35、that may impact the use of this standard. (Approved May 1, 2012.)(1) Table 1 and 5.3 were revised.(2) Section 3 was editorially revised.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stan
36、dard 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 and must be reviewed every five years and
37、if 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 of theresponsible technical committee, w
38、hich 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 C700, West Conshohocken, PA 19428-2959
39、,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/).A302/A302M 124
