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ASME SA240-2010 pdf download

1. Scope 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. 1.2 The 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 systemmust be used independently ofthe other. Com- bining values from the two systems may result in noncon- formance with the specification. 1.3 This specification is expressed in both inch-pound and SI units. However, unless the order specifies the appli- cable “M” specification designation (SI units), the material shall be furnished in inch-pound units. 2. Referenced Documents 2.1 ASTM Standards: A 370 Test Methods and Definitions for Mechanical Test- ing of Steel Products A 480/A 480MSpecificationforGeneral Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip A 923 Test Methods for Detecting Detrimental Intermetal- lic Phase in Wrought Duplex Austenitic/Ferritic Stain- less Steels E 112 Test Methods for Determining Average Grain Size E 527 Practice for Numbering Metals and Alloys (UNS) 2.2 SAE Standard: J 1086 Practice for Numbering Metals and Alloys (UNS)3. General Requirements 3.1 The following requirements for orders for material furnished under this specification shall conform to the applicable requirements ofthe current edition ofSpecifica- tion A 480/A 480M. 3.1.1 Definitions, 3.1.2 General requirements for delivery, 3.1.3 Ordering information, 3.1.4 Process, 3.1.5 Special tests, 3.1.6 Heat treatment, 3.1.7 Dimensions and permissible variations, 3.1.8 Workmanship, finish and appearance, 3.1.9 Number of tests/test methods, 3.1.10 Specimen preparation, 3.1.11 Retreatment, 3.1.12 Inspection, 3.1.13 Rejection and rehearing, 3.1.14 Material test report, 3.1.15 Certification, and 3.1.16 Packaging, marking, and loading. 4. Chemical Composition 4.1 The steel shall conform to the requirements as to chemical composition specified in Table 1, and shall conform to applicable requirements specified in Specifica- tion A 480/A 480M.
S1. Charpy Impact Testing of Plate S1.1 Charpy impact tests shall be conducted in accor- dance with Test Methods and Definitions A 370. S1.2 Number ofTests — One impact test (3 specimens) shall be made from one plate per heat treatment lot in the final heat treated condition. S1.3 Orientation ofTest Specimens — Unless specified as transverse specimens (long axis of the specimen trans- verse to the final rolling direction, root ofthe notch perpen- dicular 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 pro- vided that suchtests meet the acceptance criteria applicable to longitudinal specimens. Unless otherwise specified on the purchase order, the specimens shall be taken so as to include the mid-thickness of the product. S1.4 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 Note).
S1.5 Acceptance Limit — Unless otherwise specified on the purchase order, each ofthe three specimens tested shall show a lateral expansion opposite the notch of not less than 0.015 in. [0.38 mm]. S1.6 Records — The recorded results shall include the specimen orientation, specimen size, test temperature, absorbed energy values (ifrequired), and lateral expansion opposite the notch. S2. Materials for High-Temperature Service S2.1 Unless an H grade has been ordered, this supple- mentary 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 ofthe ASME Code, when the material meets all requirements of this specifica- tion and the grain size is ASTM No. 7 or coarser as deter- mined in accordance with Test Method E 112. The grain size shall be reported on a Certified Test Report.

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