Designation:A240/A240M–04a e1
Standard Specification for
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet,and Strip for Pressure Vessels and for General Applications1
This standard is issued under thefixed designation A240/A240M;the number immediately following the designation indicates the year of 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(e)indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
e1N OTE—Tables1and2were editorially corrected in March2004.
1.Scope*
1.1This specification2covers chromium,chromium-nickel, and chromium-manganese-nickel stainless steel plate,sheet, and strip for pressure vessels and for general applications. 1.2The values stated in either inch-pound units or SI units are to be regarded separately as standard.The values stated in each system are not exact equivalents;therefore,each system must be used independently of the other.Combining values from the two systems may result in nonconformance with the specification.
1.3This specification is expressed in both inch-pound and SI units.However,unless the order specifies the applicable “M”specification designation(SI units),the material shall be furnished in inch-pound units.
2.Referenced Documents
2.1ASTM Standards:3
A370Test Methods and Definitions for Mechanical Testing of Steel Products
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet,and Strip
A923Test Methods for Detecting Detrimental Intermetallic Phase in Wrought Duplex Austenitic/Ferritic Stainless Steels
E112Test Methods for Determining Average Grain Size E527Practice for Numbering Metals and Alloys(UNS) 2.2SAE Standard:
J1086Practice for Numbering Metals and Alloys(UNS)4
3.General Requirements
3.1The following requirements for orders for material furnished under this specification shall conform to the appli-cable requirements of the current edition of Specification A480/A480M.
3.1.1Definitions;
3.1.2General requirements for delivery;
3.1.3Ordering information;
3.1.4Process;
3.1.5Special tests;
3.1.6Heat treatment;
3.1.7Dimensions and permissible variations;
3.1.8Workmanship,finish and appearance;
3.1.9Number of tests/test methods;editorially
3.1.10Specimen preparation;
3.1.11Retreatment;
3.1.12Inspection;
3.1.13Rejection and rehearing;
3.1.14Material test report;
3.1.15Certification;and
3.1.16Packaging,marking,and loading.
4.Chemical Composition
4.1The steel shall conform to the requirements as to chemical composition specified in Table1and shall conform to applicable requirements specified in Specification A480/ A480M.
5.Mechanical Properties
5.1The material shall conform to the mechanical properties specified in Table2.
5.2When specified by the purchaser,Charpy impact tests shall be performed in accordance with Supplementary Require-ment S1.
1This specification is under the jurisdiction of ASTM Committee A01on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.17on Flat-Rolled and Wrought Stainless Steel.
Current edition approved March1,2004.Published March2004.Originally approved in1940.Last previous edition approved in2004as A240/A240M–04.
2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-240in Section II of that Code.
3For referenced ASTM standards,visit the ASTM website,,or contact ASTM Customer Service at For Annual Book of ASTM
Standards volume information,refer to the standard’s Document Summary page on the ASTM website.
4Available from Society of Automotive Engineers,400Commonwealth Dr., Warrendale,PA15096.
1
*A Summary of Changes section appears at the end of this standard. Copyright©ASTM International,100Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.
6.Materials for High-Temperature Service
6.1The austenitic H Types shall conform to an average grain size of ASTM No.7or coarser as measured by Test Methods E112.
6.2Supplementary Requirement S2shall be invoked when non-H grade austenitic stainless steels are ordered for ASME Code applications for service above1000°F[540°C].
6.3Grade S31060,unless otherwise specified in the pur-chase order,shall conform to an average grain size of ASTM No.7or coarser,as measured by Test Methods E
112.

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