ASTM A240_A240M - 20a. : 500. : Designation: A240/A240M − 20aStandard Specif i cation forChromium and Chromium-Nickel Stainless Steel Plate,Sheet, and Strip for Pressure Vessels and for GeneralApplications 1This standard is issued under the f i xed designation A240/A240M; the number immediately …