ASTM_A_737_-_A_737M_-_09_2013.pdf

Designation:A737/A737M09(Reapproved 2013)Standard Specification forPressure Vessel Plates,High-Strength,Low-Alloy Steel1This standard is issued under the fixed designation A737/A737M;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.Scope1.1 This specification2covers high-strength low-alloy steelplates for service in welded pressure vessels and pipingcomponents.1.2 This material is particularly intended for piping andpressure vessel applications where high strength and improvedtoughness are required.1.3 Two grades,designated B and C,are covered by thisspecification.Grade B provides a minimum yield strength of50 ksi 345 MPa.Grade C provides a minimum yield strengthof 60 ksi 415 MPa.1.4 The maximum thickness of plates is limited only by thecapacity of the chemical composition and heat treatment tomeet the specified mechanical property requirements;however,current practice normally limits the maximum thickness to 4 in.100 mm for each grade.1.5 Grade C in the as-rolled condition is sensitive tocracking during flame cutting,transit,and handling,particu-larly in thicknesses over 2 in.50 mm.Plates should not beshipped in the as-rolled condition only except by mutualagreement between the manufacturer and the purchaser.1.6 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 specification shall conform tothe requirements of Specification A20/A20M.These require-ments outline the testing and retesting methods and procedures,permitted variations in dimensions and mass,quality,repair ofdefects,marking,loading,and ordering information.3.2 Inadditiontothebasicrequirementsofthisspecification,certain supplementary 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 If the requirements of this specification are in conflictwith the requirements of Specification A20/A20M,the require-ments of this specification shall prevail.4.Manufacture4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine austenitic grain size requirement ofSpecification A20/A20M.5.Heat Treatment5.1 The material shall be normalized by heating to a suitabletemperature which produces an austenitic structure,but notexceeding 1700F 925C,holding a sufficient time to attainuniform heat throughout the material,and cooling in air.5.2 If approved by the purchaser,cooling rates faster thanair cooling are permitted for improvement of strength ortoughness,provided the plates are subsequently tempered inthe temperature range from 1100 to 1300F 595 to 705C.5.3 When the fabricator elects to perform the heat treatmentin 5.1 and 5.2,the manufacturer shall normalize plates con-forming to Grade C within the range from 1650 to 1850oF 9001This 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 Oct.1,2013.Published October 2013.Originallyapproved in 1976.Last previous edition approved in 2009 as A737/A737M 09.DOI:10.1520/A0737_A0737M-13.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-737 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);to 1010oC prior to shipment for plates exceeding 2 in.50mm in thickness unless otherwise agreed to.6.Chemical Requirements6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1 unless otherwisemodi