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1.1 This specification covers austenitic stainless steel forgings for boilers, pressure vessels, high temperature parts, and associated equipment.
1.2 Supplementary requirements are provided for use when additional testing, inspection, or processing is required. In addition, supplementary requirements from Specification A 788 may be specified when appropriate.
1.3 This specification includes the austenitic steel forgings that were a part of A 336/A 336M.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text and tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.
1.5 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A336/A336M Specification for Alloy Steel Forgings for Pressure and High-Temperature Parts
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A745/A745M Practice for Ultrasonic Examination of Austenitic Steel Forgings
A788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining Average Grain Size
Other StandardsASME Boiler and Pressure Vessel Code, including Section VIII Pressure Vessels and Section IX Welding Qualifications Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990.
ICS Number Code 77.140.20 (Steels of high quality)
UNSPSC Code 31132600(Stainless steel forgings)