ASTM-A542

Designation:A 542/A 542M-99(Reapproved 2004)1NTERNATIONALStandard Specification forPressure Vessel Plates,Alloy Steel,Quenched-and-Tempered,Chromium-Molybdenum,and Chromium-Molybdenum-Vanadium"This standard is issued under the fixed designation A 542/A 542M;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 reapprovalA superscript epsilon (e)indicates an editorial change since the last revision or reapproval.Nom-Supplementary Requirement S14,Bend Test,was editorially removed in September 20041.Scope2.Referenced Documents1.1 This specification2 covers two types of 214 Cr-1 Mo and2.1 ASTM Standards:3three types of Cr-Mo-V alloy steel plates for use in theA 20/A 20M Specification for General Requirements forquenched-and-tempered condition,intended for the fabricationSteel Plates for Pressure Vesselsof welded pressure vessels and components.A 370 Test Methods and Definitions for Mechanical Testing1.2 Material under this specification is available in fiveof Steel Productstypes,designated“A,”B,”“C,”“D,”and“E.”Type B isA 435/A 435M Specification for Straight-Beam Ultrasonicidentical to Type A except for restrictive limits for carbon,Examination of Steel Platesphosphorus,sulfur,and nickel.The material is also available inA 577/A 577M Specification for Ultrasonic Angle-Beamfive classes having the following strength levels.Type E isExamination of Steel Platesavailable only as Class 4 and 4a.A 578/A 578M Specification for Straight-Beam UltrasonicClassMinimum Tensile Strength,ksi [MPa]Examination of Plain and Clad Steel Plates for SpecialApplications110572可21157953951653.General Requirements and Ordering Information4 and 4a85[58可3.1 Material supplied to this material specification shall1.3 The maximum thickness of plates is limited only by theconform to Specification A 20/A 20M.These requirementscapacity of the chemical composition to meet the specifiedoutline the testing and retesting methods and procedures,mechanical property requirements.permissible variations in dimensions,and mass,quality and1.4 The minimum thickness of plates is limited to 36 in.[5repair of defects,marking,loading,etc.mm.3.2 Specification A 20/A 20M also establishes the rules for1.5 The material is intended to be suitable for fusionthe ordering information which should be complied with whenwelding.Welding technique is of fundamental importance andpurchasing material to this specification.it is presupposed that welding procedures will be in accordance3.3 In addition to the basic requirements of this specifica-with approved methods.tion,certain supplementary requirements are available when1.6 The values stated in either inch-pound units or SI unitsadditional control,testing,or examination is required to meetare to be regarded separately as standard.Within the text,theend use requirements.These include:SI units are shown in brackets.The values stated