ASME SA-336:2019 pdf download

ASME SA-336:2019 pdf download.Standard Specification for Alloy Steel Forgings for Pressure and High-Temperature Parts
1. Scope
1.1 This specification covers ferritic steel forgings for boilers, pressure vessels, high-temperature parts, and associ- ated equipment. 1.2 Forgings made of steel grades listed in Specification A335/A335M, may also be ordered under this specification. The chemical, tensile, heat treatment, and marking require- ments of Specification A335/A335M shall apply, except the forging shall conform to the chemical requirements ofTables 1 and 2 of Specification A335/A335M only with respect to heat analysis. On product analysis they may deviate from these limits to the extent permitted in Table 1 of this specification. 1.3 Supplementary Requirements S1 to S9 are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order. 1.4 Unless the order specifies the applicable “M” specifica- tion designation, the material shall be furnished to the inch- pound units. 1.5 Specification A336/A336M formerly included austenitic steel forgings, which are now found in Specification A965/ A965M. 1.6 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. 1.7 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information and General Requirements
3.1 In addition to the ordering information required by Specification A788/A788M, the purchaser should include with the inquiry and order the following information: 3.1.1 Adrawing or sketch that shows test locations when the testing is in accordance with 8.1.1.3. 3.1.2 The intended use of forgings if 5.1 is applicable. 3.2 Material supplied to this specification shall conform to the requirements of Specification A788/A788M, which out- lines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification, product analysis variations, and addi- tional supplementary requirements. 3.3 If the requirements of this specification are in conflict with the requirements of Specification A788/A788M, the requirements of this specification shall prevail. 3.4 For hubbed flatheads and tube sheets ordered forASME Boiler and Pressure Vessel Code application, Supplementary Requirement S12 of Specification A788/A788M shall be specified. 3.5 At the purchaser’s request the forgings shall be rough machined before heat treatment (5.2). 3.6 For Section III, Part NB of the ASME Boiler and Pressure Vessel Code application, Supplementary Requirement S3 shall be specified.
4. Melting and Forging
4.1 In addition to the melting and forging requirements of Specification A788/A788M, which may be supplemented by Supplementary Requirement S8, the following conditions ap- ply: 4.1.1 A sufficient discard shall be made to secure freedom from injurious pipe and undue segregation.
5. Machining
5.1 Forged pressure vessels for steam power service shall have the inner surface machined or ground. Unfired pressure vessels shall have the inner surfaces sufficiently free ofscale to permit inspection. 5.2 Unless otherwise specified by the purchaser, when rough machining is performed, it may be done either before or after heat treatment at the manufacturer’s option.
7. Chemical Composition
7.1 Heat Analysis—The heat analysis obtained from sam- pling in accordance with Specification A788/A788M and shall comply with Table 2. 7.2 Product Analysis—The manufacturer shall use the prod- uct analysis provision of Specification A788/A788M to obtain a product analysis from a forging representing each heat or multiple heat. The product analysis for columbium and calcium for Grade F22V shall conform to the requirements of Table 2 of this specification. Boron is not subject to product analysis. The purchaser may also make this determination in accordance with Specification A788/A788M.