1、Designation:A302/A302M12Standard 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 adoption or,in the c
2、ase 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 This specifi
3、cation2covers manganese-molybdenum andmanganese-molybdenum-nickel alloy steel plates intended par-ticularly for welded boilers and other pressure vessels.1.2 Plates under this specification are available in fourgrades having different strength levels as follows:GradeTensile Strength,ksi MPaTypeA7595
4、 515655manganese-molybdenumB80100 550690manganese-molybdenumC80100 550690manganese-molybdenum-nickelD80100 550690manganese-molybdenum-nickel1.3 The maximum thickness of plates is limited only by thecapacity of the chemical composition to meet the specifiedmechanical property requirements.The minimum
5、 thickness islimited to 0.25 in.6.5 mm.1.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefore,each system mustbe used independently of
6、the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.2.Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements for SteelPlates for Pressure VesselsA435/A435M Specification for Straight-Beam UltrasonicExamination of Steel
7、PlatesA577/A577M Specification for Ultrasonic Angle-Beam Ex-amination of Steel PlatesA578/A578M Specification for Straight-Beam UltrasonicExamination of Rolled Steel Plates for Special Applica-tions3.General Requirements and Ordering Information3.1 Material supplied to this material specification sh
8、allconform to Specification A20/A20M.These requirements out-line the testing and retesting methods and procedures,permit-ted variations in dimensions,and mass,quality and repair ofdefects,marking,loading,and ordering information.3.2 Inadditiontothebasicrequirementsofthisspecification,certain supplem
9、entary requirements are availablewhen additional control,testing,or examination is required tomeet end use requirements.The purchaser is referred to thelisted supplementary requirements in this specification and tothe detailed requirements in Specification A20/A20M.3.3 Coils are excluded from qualif
10、ication to this specifica-tion until they are processed into finished plates.Platesproduced from coil means plates that have been cut toindividual lengths from coil.The processor directly controls,oris responsible for,the operations involved in the processing ofcoils into finished plates.Such operat
11、ions include decoiling,leveling,cutting to length,testing,inspection,conditioning,heat treatment(if applicable),packaging,marking,loading forshipment,and certification.NOTE1For plates produced from coil and furnished without heattreatment or with stress relieving only,three test results are reported
12、 foreach qualifying coil.Additional requirements regarding plates from coilare described in Specification A20/A20M.3.4 If the requirements of this specification are in conflictwith the requirements of Specification A20/A20M,the require-ments of this specification shall prevail.4.Materials and Manufa
13、cture4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine grain size requirement of Specifica-tion A20/A20M.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11
14、 on Steel Plates for Boilers and Pressure Vessels.Current edition approved May 1,2012.Published June 2012.Originallyapproved in 1947.Last previous edition approved in 2007 as A302/A302M 03(2007).DOI:10.1520/A0302_A0302M-12.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-ca
15、tion SA-302/SA-302M 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 Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Chang
16、es section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);5.Heat Treatment5.1 Plates 2 in.50 mm and under in thickness are normallysupplied 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 normal-ized.5.3 When normalizing plates 4 in.100 mm or over inthickness,the cooling
