ASTM_A_203_-_A_203M_-_12.pdf

Designation:A203/A203M12Standard Specification forPressure Vessel Plates,Alloy Steel,Nickel1This standard is issued under the fixed designation A203/A203M;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This specification2covers nickel-alloy steel plates in-tended primarily for welded pressure vessels.1.2 Plates under this specification are available with fourstrength levels and two nickel compositions as follows:GradeNominal NickelContent%Yield Strength,min,ksi MPaTensile Strength,min,ksi MPaA2.2537 25565 450B2.2540 27570 485D3.5037 25565 450E3.5040 27570 485F3.502 in.50 mm and under55 38080 550 ccccOver 2 in.50 mm50 34575 5151.3 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalproperty requirements.However,current practice normallylimits the maximum thickness of plates furnished under thisspecification as follows:GradeMaximum Thickness,in.mmA6 150B6 150D4 100E4 100F4 1001.4 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 this 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 A20/A20M.These requirements outline the testingand 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 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 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 grain size requirement of Specifica-tion A20/A20M.5.Heat Treatment5.1 All plates shall be thermally treated as follows: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 1937.Last previous edition approved in 2003 as A203/A203M 97(2003)1.DOI:10.1520/A0203_A0203M-12.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA-203/SA-203M 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);5.1.1 All plates of Grades A,B,D,and E shall be normal-ized except as permitted by 5.1.1.1.5.1.1.1 If approved by the purchaser for GradesA,B,D,andE,cooling rates faster than air cooling are permissible forimprovement of the toughness,provided the plates are subse-quently tempered at not less than 1100F 595C for not lessthan12h.5.1.2 All plates of Grade F shall be heat treated by heatinginto the austenitic range,quenching in water,and tempering atnot less than 1100F 595C for not less than12h.6.Chemical Composition6.1 The steel shall conform to the chemical requirementsshown in Table 1 unless otherwise modified in accordance withSupplementary Requirement S17,Vacuum Carbon-DeoxidizedSteel,in Specification A20/A20M.7.Mechanical Properties7.1 Tension Test RequirementsThe material as representedby the tension test specimens shall conform to the requirementsshown in Table 2.7.1.1 For plates that have been heat treated in accordan