FOR INTERNAL REFERENCE ONLYDesignation: A/AM – 12 Standard Speciﬁcation for Castings, Iron-Chromium-Nickel-Molybdenum Co. Heat treatment can modify the corrosion resistance of stainless steels. Thus, the corrosion behavior of ASTM A/A M GR 5A super duplex. The Duplex Stainless classification includes the following ASTM standards; ASTM A and ASTM A
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Combining values from the two systems may result in nonconformance with the standard. ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed. Looking for a career in the Valve Industry? A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A Emerson Completes Acquisition of iSolutions Inc. Link to Active This link will always route to the current Active version of the standard.
Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. Latest Post Popular Links Events. Upcoming Valve Industry Events Reprints. Admiral Valve Announces Partnership with Diek.
As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.
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However, A imposes some additional requirements: The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Each heat of material must be tensile tested.
Marking of heat numbers on castings is not required unless specified separately on the purchase order. Monitoring Pressure Relief Devices Post: New Washer Application Search Tool.
This abstract is a brief summary of the referenced standard. Each casting must be hydrostatically tested. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. Castings shall be marked for material identification with the specification designation and grade.
Historical Version s – view previous versions of standard. New Products Prev Next Rotork: Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
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ASTM A was reapproved without changes in However, one thing is clear-materials are not added in these codes unless the parent specification requires tensile testing to ensure that the product being supplied actually meets the minimum mechanical properties upon asym the design is based. It is the responsibility of the purchaser to determine asgm grade shall be furnished depending on design and service conditions, mechanical properties, and corrosion-resistant characteristics.
However, A imposes some additional requirements:. Despite Oil Prices Post: In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also satm imposed. The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. Texas Manufacturing Expands Modestly, Outlook.
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A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat at higher temperatures, hold for wstm minimum time at temperature and then rapidly cool the castings in order to enhance the corrosion resistance and meet the required mechanical properties.