1、Designation:A 202/A 202M 03Standard Specification forPressure Vessel Plates,Alloy Steel,Chromium-Manganese-Silicon1This standard is issued under the fixed designationA202/A202M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year
2、 of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification2covers chromium-manganese-siliconalloy steel plates,intended particularly for welded boilers ando
3、ther pressure vessels.1.2 Plates under this specification are available in twogrades having strength levels as follows:GradeTensile Strengthksi MPaA7595 515655B85110 5857601.3 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalproperty r
4、equirements;however,current practice normallylimits the maximum thickness of plates furnished under thisspecification to 2 in.50 mm.1.4 Grade A is suitable for rivets and when so used the barsshall be subject to the requirements for rolled bars specified inSpecification A 31,except for the chemical
5、and mechanicalrequirements.1.5 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.Co
6、mbining values from thetwo systems may result in nonconformance with this specifi-cation.2.Referenced Documents2.1 ASTM Standards:A 20/A 20M Specification for General Requirements forSteel Plates for Pressure Vessels3A 31 Specification for Steel Rivets and Bars for Rivets,Pressure Vessels4A 435/A 43
7、5M Specification for Straight-Beam UltrasonicExamination of Steel Plates3A 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel Plates3A 578/A 578M Specification for Straight-Beam UltrasonicExamination of Plain and Clad Steel Plates for SpecialApplications33.General Requirements an
8、d Ordering Information3.1 Plates supplied to this product specification shall con-form to Specification A 20/A 20M,which outlines the testingand retesting methods and procedures,permissible variationsin dimensions and mass,quality and repair of defects,marking,loading,etc.3.2 Specification A 20/A 20
9、M also establishes the rules forordering information that should be complied with whenpurchasing plates to this specification.3.3 In addition to the basic requirements of this specifica-tion,certain supplementary requirements are available whereadditional control,testing,or examination is required t
10、o meetend use requirements.3.4 The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed require-ments in Specification A 20/A 20M.3.5 Coils are excluded from qualification to this specifica-tion until they are processed into finished plates.Platespr
11、oduced 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,hea
12、t 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 descri
13、bed in Specification A 20/A 20 M.3.6 If the requirements of this specification are in conflictwith the requirements of Specification A 20/A 20M,the re-quirements of this specification shall prevail.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel,and Relat
14、ed Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Sept.10,2003.Published October 2003.Originallyapproved in 1937.Last previous edition approved in 1999 as A 202/A 202M 93(1999).2For ASME Boiler and Pressure Vess
15、el Code applications,see related Specifi-cation SA-202/SA-202M in Section II of that Code.3Annual Book of ASTM Standards,Vol 01.04.4Annual Book of ASTM Standards,Vol 01.08.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C70
16、0,West Conshohocken,PA 19428-2959,United States.4.Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed.5.Heat Treatment5.1 Plates are normally supplied in the as-rolled condition.The plates may be ordered normalized or stress relieved,orboth.6.Chemical Requirements6.1 The steel shall conform to the chemical requirementsgiven in Table 1.7.Mechanical Requirements7.1 Tension Test RequirementsThe plates,as representedby the tension test specimens,shall conform to the require-me
