ASME SA 240:2021 pdf free download

ASME SA 240:2021 pdf free download.SPECIFICATION FOR CHROMIUM AND CHROMIUM-NICKEL STAINLESS STEEL PLATE, SHEET, AND STRIP FOR PRESSURE VESSELS AND FOR GENERAL APPLICATIONS.
1. 1 This specification covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate. sheet. and strip for pressure vessels and for general applications including architectural, building, construction, and aesthetic applications.
1 .2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 This 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 he furnished in inch-pound units.
1 .4 This standard does hot purport to address all of the safety concerns, if an associated wit/i its use. it is the responsibiIi of the user of this standard to establish appropriate safety, health, and enyi,vnmental practices and deter— mine the applicability f regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT,) Committee.
Si. Charpy Impact Testing of Plate
S 1.1 Charpy impact tests shall he conducted in accordance with Test Methods and Definitions A370.
S 1.2 Number of Tests—One impact test (three specimens) shall he made from one plate per heat treatment lot in the linal heat treated condition.
S 1 .3 Orientation of Test Specimens—Unless specified as transverse specimens (long axis of the specimen transverse to the final rolling direction, root of the notch perpendicular to the rolling face) on the purchase order, the orientation of the specimens shall be longitudinal (long axis of the specimen parallel to the final rolling direction, root of the notch perpendicular to the rolling face). The manufacturer is permitted to test transverse specimens provided that such tests meet the acceptance criteria applicable to longitudinal specimens. Unless otherwise specified on the purchase order, the specimens shall he taken so as to include the mid-thickness of the product.
S 1.4 Test Temperature—The purchaser shall specify the test temperature. The manufacturer is permitted to test specimens at a temperature lower than that specified by the purchaser, provided that such tests shall meet the acceptance criteria applicable to specimens tested at the specified temperature (see the note below).
NorE S 1.1—Test Methods A923, Method B. applicable to some duplex (ausenitic-fenitic) stainless steels as listed in Test Methods A923, uses a Charpy impact test for the purpose of determining the absence of detrimental intermetallic phases. Method B specifies a test temperature and acceptance criterion, expressed as impact energy, for each type of steel covered. It may be economical for the Charpy impact tests performed on duplex stainless steels covered in both Specification A240and Test Methods A923 to be performed at the lower of the temperatures specified by this supplementary requirement and Test Methods A923 Method B, with measurement of both lateral expansion and impact energy.
S2. Materials for High-Temperature Service
S2. I Unless an H grade has been ordered, this supplementary requirement shall be specified for ASME Code applications for service above 1000°F [540°C].
S2.2 The user is permitted to use an austenitic stainless steel as the corresponding H grade when the material meets all requirements of the H grade including chemistry, annealing temperature, and grain size (see Section 6).
S2.3 The user is permitted to use an L grade austenitic stainless steel for service above 1000°F [540°C], subject to the applicable allowable stress table of the ASME Code, when the material meets all requirements of this specification and the grain size is ASTM No. 7 or coarser as determined in accordance with Test Methods El 12. The grain size shall be reported on a Certified Test Report.