ASTM_A_724_-_A_724M_-_09_2013.pdf

Designation:A724/A724M09(Reapproved 2013)Standard Specification forPressure Vessel Plates,Carbon-Manganese-Silicon Steel,Quenched and Tempered,for Welded Pressure Vessels1This standard is issued under the fixed designation A724/A724M;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 three grades of carbon-manganese-silicon steel,designated GradesA,B,and C.GradeC may be produced with a boron addition.The plates arequenched and tempered and are intended for welded-layeredpressure vessels.1.2 The maximum thickness of plates supplied under thisspecification is limited only by the capability of the chemicalcomposition to meet the specified mechanical requirements.However,current practice normally limits the maximum thick-ness to78in.22 mm for GradesAand B,and to 2 in.50 mmfor Grade C.1.3 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 Vessels3.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 weight,quality and 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 ProcessThe steel shall be killed and shallconform to the fine austenitic grain size requirement ofSpecification A20/A20M.5.Heat Treatment5.1 All plates shall be quenched from a temperature in therange from 1600 to 1700F 870 to 925C.Grades A and Bshall then be tempered at not less than 1100F 595C,andGrade C shall then be tempered at not less than 1150F620C.The tempering soaking time shall be not less than12h.6.Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1.7.Mechanical Properties7.1 Tension Test Requirements:7.1.1 The material as represented by the tension test speci-mens shall conform to the requirements given in Table 2.7.1.2 For nominal plate thicknesses of34in.20 mm andunder,the 112-in.40-mm wide rectangular specimen may beused for the tension test,and the elongation may be determinedin a 2-in.50-mm gage length that includes the fracture andshows the greatest elongation.8.Keywords8.1 alloy steel;alloy steel plate;pressure containing parts;pressure vessel steels;steel plates;steel plates for pressurevessels1This 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 1975.Last previous edition approved in 2009 as A724/A724M 09.DOI:10.1520/A0724_A0724M-13.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA-724/SA-724M 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);SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.A list of standardized supplementary requirements for use at the option of the purchaser is includedin Specification A20/A20M.Several of those that are considered suitable for use with thisspecification are listed by title.Other tests may be performed by agreement between the supplier andthe purchaser.S1.Vacuum Treatment,S2.Product Analysis,S3.Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S5.Charpy V-Notch Impact Test,S7.High-Temperature Tension Test,S8.Ultrasonic Examina