ASTM_A_225_-_A_225M_-_12.pdf

Designation:A225/A225M12Standard Specification forPressure Vessel Plates,Alloy Steel,Manganese-Vanadium-Nickel1This standard is issued under the fixed designation A225/A225M;the number immediately following the designation indicates 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.1.Scope*1.1 This specification2covers manganese-vanadium-nickelalloy steel plates intended primarily for welded layered pres-sure vessels.1.2 Plates under this specification are available in twogrades having different strength levels as follows:GradeTensile Strength,ksi MPaC105135 725930D3 in.75 mm and under80105 550725Over 3 in.75 mm75100 5156901.3 The maximum thickness of plates is limited only by thecapacity of the chemical composition to meet the specifiedmechanical property requirements;however,current mill prac-tice normally limits Grade C to 0.58 in.15 mm maximum andGrade D to 6 in.150 mm maximum.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 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 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 shallconform 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 In addition to the basic requirements of this specifica-tion,certain supplementary requirements are available whenadditional control,testing,or examination is required to meetend use requirements.The purchaser is referred to the listedsupplementary requirements in this specification and to thedetailed requirements in Specification A20/A20M.3.3 Coils are excluded from qualification 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 operations 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 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 Manufacture4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine austenitic grain size requirement ofSpecification A20/A20M.5.Heat Treatment5.1 Grade D plates of all thicknesses and Grade C plates ofthicknesses over 2 in.50 mm shall be normalized.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 on Steel Plates for Boilers and Pressure Vessels.Current edition approved May 1,2012.Published June 2012.Originallyapproved in 1939.Last previous edition approved in 2007 as A225/A225M 03(2007).DOI:10.1520/A0225_A0225M-12.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA-225/SA-225M 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 Changes 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);5.2 Grade C plates 2 in.50 mm and under in thickness areusually supplied in the as-rolled condition.The plates may beordered normalized or stress-relieved,or both.6.Chemical Composition6.1 The steel shall conform to the chemical requirementsgiven in Table 1,unless otherwise modified in accordance withSupplementary Requ