ASTM_A_1041_-_A_1041M_-_04_2009.pdf

Designation:A 1041/A 1041M 04(Reapproved 2009)Standard Specification forPressure Vessel Plates,Alloy Steel,Higher StrengthChromium-Molybdenum-Tungsten1This standard is issued under the fixed designation A 1041/A 1041M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 Thisspecificationcoverschromium-tungsten-molybdenum-vanadium,with or without tantalum,alloy steelplates intended primarily for welded boilers and pressurevessels designed for elevated temperature service.1.2 Plates are available under this specification in twogrades having different alloy contents as follows:GradeNominalChromiumContent,%NominalTungstenContent,%NominalMolybdenumContent,%NominalVanadiumContent,%NominalTantalumContent,%3153.001.500.750.25315T3.001.500.750.250.101.3 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalproperty requirements.1.4 The specification is expressed in both inch-pound unitsand in SI units;however,unless the order specifies theapplicable“M”specification designation(SI units),the platesare furnished to inch-pound units.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.2.Referenced Documents2.1 ASTM Standards:2A 20/A 20M Specification for General Requirements forSteel Plates for Pressure VesselsA 435/A 435M Specification for Straight-Beam UltrasonicExamination of Steel PlatesA 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel PlatesA 578/A 578M Specification for Straight-Beam UltrasonicExamination of Rolled Steel Plates for Special Applica-tions3.General Requirements3.1 Product furnished to this specification shall conform toSpecification A 20/A 20M,including any supplementary re-quirements indicated in the purchase order or contract.Failureto comply with the general requirements of SpecificationA 20/A 20M constitutes nonconformance with this specifica-tion.In case of conflict between the requirements of thisspecification and Specification A 20/A 20M,the requirementsof this specification shall prevail.3.2 In addition to the basic requirements of this specifica-tion,certain supplementary requirements are available if addi-tional control,testing,or examination is required to meet enduse requirements.The purchaser is referred to the listedsupplementary requirements in this specification and to thedetailed requirements in Specification A 20/A 20M.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 May 1,2009.Published May 2009.Originallyapproved in 2004.Last previous edition approved in 2004 asA1041/A1041M 04.2For 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.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine austenitic grain size requirements ofSpecification A 20/A 20M.5.Heat Treatment5.1 Except as allowed by 5.2,all plates shall be normalizedat 1950 to 2050F 1065 to 1120C and then tempered at 1290to 1400F 700 to 760C.5.2 Plates ordered without the heat treatment required by5.1 shall be furnished in either the stress-relieved or annealedcondition,and the purchaser shall be responsible for the heattreatment of such plates to conform to 5.1.6.Chemical Composition6.1 The steel shall conform to the requirements for chemicalcomposition given in Table 1.7.Mechanical Properties7.1 Tension TestThe plates,as represented by the tensiontest specimens,shall conform to the applicable requirementsgiven in Table 2.8.Keywords8.1 alloy steel plates;chromium;creep resistance;elevatedtemperature service;high-strength;hydrogen service;molyb-denum;pressure vessels;tantalum;tungsten;vanadiumSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.A list of standardizedsupplementary requirements for use at the option of the purchaser is included in SpecificationA 20/A 20M.Several of those considered suitable for use with this specification are listed below bytitle.Other tests may be performed by agreement between the supplier and the purchaser.S1.Vacuum TreatmentS2.Product AnalysisS3.