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Designation: A 240/A 240M – 08a 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 the fixed designation A 240/A 240M; 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 (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* E 112 Test Methods for Determining Average Grain Size 1.1 This specification2 covers chromium, chromium-nickel, E 527 Practice for Numbering Metals and Alloys in the and chromium-manganese-nickel stainless steel plate, sheet, Unified Numbering System (UNS) 2.2 SAE Standard:4 and strip for pressure vessels and for general applications. 1.2 The values stated in either SI units or inch-pound units J 1086 Practice for Numbering Metals and Alloys (UNS) are to be regarded separately as standard. The values stated in 3. General Requirements each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining 3.1 The following requirements for orders for material values from the two systems may result in non-conforman