Standard Specification for Chromium and Chromium-Nickel ...

1 Designation: A 240/A 240M 04ae1 Standard Specification forChromium and Chromium -Nickel stainless steel Plate,Sheet, and Strip for Pressure Vessels and for GeneralApplications1 This Standard is issued under the fixed designation A 240/A 240M; 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 superscript epsilon (e) indicates an editorial change since the last revision or Standard has been approved for use by agencies of the Department of Tables 1 and 2 were editorially corrected in March Scope* This specification2covers Chromium , Chromium -nickel,and Chromium -manganese-nickel stainless steel plate, sheet,and strip for pressure vessels and for general The values stated in either inch-pound units or SI unitsare to be regarded separately as Standard .

2 The values stated ineach system are not exact equivalents; therefore, each systemmust be used independently of the other. Combining valuesfrom the two systems may result in nonconformance with This specification is expressed in both inch-pound andSI units. However, unless the order specifies the applicable M specification designation (SI units), the material shall befurnished in inch-pound Referenced Standards:3A 370 Test Methods and Definitions for Mechanical Testingof steel ProductsA 480/A 480M Specification for General Requirements forFlat-Rolled stainless and Heat-Resisting steel Plate,Sheet, and StripA 923 Test Methods for Detecting Detrimental IntermetallicPhase in Wrought Duplex Austenitic/Ferritic StainlessSteelsE 112 Test Methods for Determining Average Grain SizeE 527 Practice for Numbering Metals and Alloys (UNS) Standard :J 1086 Practice for Numbering Metals and Alloys (UNS)43.

3 General The following requirements for orders for materialfurnished under this specification shall conform to the appli-cable requirements of the current edition of SpecificationA 480/A Definitions; General requirements for delivery; Ordering information; Process; Special tests; Heat treatment; Dimensions and permissible variations; Workmanship, finish and appearance; Number of tests/test methods; Specimen preparation; Retreatment; Inspection; Rejection and rehearing; Material test report; Certification.

4 Packaging, marking, and Chemical The steel shall conform to the requirements as tochemical composition specified in Table 1 and shall conform toapplicable requirements specified in Specification A 480/A Mechanical The material shall conform to the mechanical propertiesspecified in Table When specified by the purchaser, Charpy impact testsshall be performed in accordance with Supplementary Require-ment specification is under the jurisdiction of ASTM Committee A01 on steel , stainless steel and Related Alloys and is the direct responsibility of on Flat-Rolled and Wrought stainless edition approved March 1, 2004.

5 Published March 2004. Originallyapproved in 1940. Last previous edition approved in 2004 as A 240/A 240M ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-240 in Section II of that referenced ASTM standards, visit the ASTM website, , orcontact ASTM Customer Service at ForAnnual Book of ASTMS tandardsvolume information, refer to the Standard s Document Summary page onthe ASTM from Society of Automotive Engineers, 400 Commonwealth Dr.,Warrendale, PA *A Summary of Changes section appears at the end of this ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Materials for High-Temperature The austeniticHTypes shall conform to an averagegrain size of ASTM No.

6 7 or coarser as measured by TestMethods E Supplementary Requirement S2 shall be invoked whennon-H grade austenitic stainless steels are ordered for ASMECode applications for service above 1000 F [540 C]. Grade S31060, unless otherwise specified in the pur-chase order, shall conform to an average grain size of ASTMNo. 7 or coarser, as measured by Test Methods E 240/A 240M 04ae12 TABLE 1 Chemical Composition Requirements, %AUNSD esignationBTypeCCarbonDManganesePhos-pho rusSulfurSiliconChromiumNickelMolybdenum NitrogenCopperOtherElementsE,FAustenitic ( Chromium -Nickel) ( Chromium -Manganese-Nickel)N08020.

7 83C min, maxN08367.. minAl .. minAl ..N08926..S20103..S20153..S20161..S20400 ..Cb .. min..S21800..S30415..Ce ..S30600..S30601..S30615..Al ..Ce ..Cb 103C min, ..Cb 103C min, ..Cb 103C min, maxA 240/A 240M 04ae13 TABLE 1 ContinuedUNSD esignationBTypeCCarbonDManganesePhos-pho rusSulfurSiliconChromiumNickelMolybdenum NitrogenCopperOtherElementsE, ..Cb 103C min, maxS31050310 ..S31060..Ce + ..S31266..Ti 53(C+N)min, ..Cb 103 Cmin.

8 S31727..S32050..S32053..Ti 53(C+N)min, ..Ti 43(C+N)min, maxS32615..S32654..S33228..Ce ..Al ..Cb ..Cb 103C min, ..Cb 83C min, ..(Cb + Ta) 103 Cmin, maxTa ..(Cb + Ta) 83 Cmin, maxTa ..Ce ..S38815.. 240/A 240M 04ae14 TABLE 1 ContinuedUNSD esignationBTypeCCarbonDManganesePhos-pho rusSulfurSiliconChromiumNickelMolybdenum NitrogenCopperOtherElementsE,FDuplex (Austenitic-Ferritic)S31200..S31260..S32 001..S32003..S32101..W ..S32760K..S32906..S32950.

9 S39274 .. or Martensitic ( Chromium )S32803.. (C+N) ..Cb 123(C+N)min, ..Al ..Ti 63(C+N) min, max; ..Ti 83(C+N) min,Ti ; ..(Ti+Cb) [ +83(C+N)] min, max;Ti minS40945..Cb ..Ti 63(C+N) min, maxS40977..S41003.. 93(C+N) min, maxS41050..S41500M..S42035..Ti ..Ti [ +4(C+N)]min, max; ..Cb 53C min, maxA 240/A 240M 04ae15 TABLE 1 ContinuedUNSD esignationBTypeCCarbonDManganesePhos-pho rusSulfurSiliconChromiumNickelMolybdenum NitrogenCopperOtherElementsE,FS43932..(T i+Cb)[ +4(C+N)]min, max;Al.

10 Ti Cb[ +(33C)] ..(Ti+Cb)[ +4(C+N)]min, maxS44500.. 103(C+N)min, ;Ti 7(C+N) (Ni + Cu) ..(Ti+Cb) [ +4(C+N)] min, ..(Ti+Cb) , Ti + Cb63(C+N) minS44700.. (C+N) ..(Ti+Cb) ,(Ti+Cb) 63(C+N) minS44800.. (C+N) ..Ti (Ti+Cb) [ +4(C+N)] min, , unless range or minimum is established in accordance with Practice E 527 and SAE J otherwise indicated, a grade designation originally assigned by the American Iron and steel Institute (AISI).DCarbon analysis shall be reported to nearest % except for the low-carbon types, which shall be reported to nearest %.