ASTM_A_841_-_A_841M_-_13.pdf

Designation:A841/A841M13Standard Specification forSteel Plates for Pressure Vessels,Produced by Thermo-Mechanical Control Process(TMCP)1This standard is issued under the fixed designation A841/A841M;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.Scope*1.1 This specification2covers steel plates produced by thethermo-mechanical control process(TMCP).The plates areintended primarily for use in welded pressure vessels.Adescription of the TMCP method is given in Appendix X1.1.2 Due to the inherent characteristics of the TMCPmethod,the plates cannot be formed at elevated temperatures withoutsustaining significant losses in strength and toughness.Exceptfor Grade G,the plates may be formed and post-weld heat-treated at temperatures not exceeding 1200F 650C,provid-ing the requirements of 6.1 are met.Grade G plates may beformed at temperatures not exceeding 985F 530C providedthe requirements of 6.1 are met.1.3 The maximum permitted nominal thickness of platesfurnished to this specification is 4 in.100 mm for Grades A,B,and C;1.5 in.40 mm for Grades D,3E,and F;and 2 in.50 mm for Grade G.1.4 Grade G is susceptible to magnetization.Use of magnetsin handling after heat treatment should be avoided if residualmagnetism would be detrimental to subsequent fabrication orservice.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.Combining values from thetwo systems may result in nonconformance with this specifi-cation.2.Referenced Documents2.1 ASTM Standards:4A20/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 Plates supplied to this product specification shall con-form to Specification A20/A20M,which outlines the testingand retesting methods and procedures,permissible variationsin dimensions,quality and repair of defects,marking,loading,etc.3.2 Specification A20/A20M also establishes the rules forordering information that should be complied with whenpurchasing plates to this specification.3.2.1 If the plates are to be subjected to warm forming orpost-weld heat treatment,the order must indicate the tempera-tures and times-at-temperature that will be utilized in suchoperations.(See 6.1 and Specification A20/A20M,Supplemen-tary Requirement S3.)3.3 Inadditiontothebasicrequirementsofthisspecification,certain supplementary requirements are availablewhen additional control,testing,or examination is required tomeet end use requirements.These include:3.3.1 Vacuum treatment,3.3.2 Additional or special tension testing,3.3.3 Additional or special impact testing,and3.3.4 Nondestructive examination.3.4 The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed require-ments in Specification A20/A20M.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 Oct.1,2013.Published November 2013.Originallyapproved in 1985.Last previous edition approved in 2007 as A841/A841M 03a(2007).DOI:10.1520/A0841_A0841M-13.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA-841/SA-841M in Section II of that Code.3ExxonMobil Upstream Research Company has patents pending concerning theuse of chemistry ranges in ASTM A841 Grade D,in combination with specificTMCP routes and/or specific microstructural features.Interested parties are invitedto submit information regarding identification of alternatives to these patented itemsto ASTM International Headquarters.Your comments will receive careful consid-eration at a meeting of the responsible technical committee,1which you may attend.4For 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);3.5 If the requirements of this specification are in conflictwith the