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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Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. Admiral Valve Announces Partnership with Diek.
In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed. For this reason alone, many specifications that don’t require actual tensile astk are not represented in these codes. Emerson Completes Acquisition of iSolutions I.
Rigging a89 Lifting of Large Valves Post: The material may be adopted in ASME codes for specific products or applications, including: Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. ViewIn Technology for Mechanical Seals. However, A imposes some additional requirements: Monitoring Pressure Relief Devices Post: What is the difference between these specifications?
Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting
Shale Work Up in U. Latest Post Popular Links Events. Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.
Each casting must be hydrostatically tested. Each heat of material must be tensile tested. ASTM A was reapproved without changes in Work Item s – proposed revisions of this standard.
New Products Prev Next Rotork: It awtm the responsibility of the purchaser to determine which grade shall be furnished depending on design and service conditions, mechanical properties, and corrosion-resistant characteristics.
Historical Version s – view previous versions of standard. Each casting must be marked with a heat number or with a serial number traceable to a heat number.
Any casting that meets A also meets A The values stated in each system may not be exact equivalents; a89, each system shall be used independently of the other. This abstract is a brief summary of the referenced standard. As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.
Castings shall be marked for material identification with the specification designation and grade. ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed. Combining values from the two systems may result in nonconformance with the standard.
Link to Active This link will always route to the current Active version of the standard.
Duplex Stainless Steels
Custom Hydraulic Power Units. Marking of heat numbers on castings is not required unless specified separately on the purchase order. Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat at higher temperatures, hold for some minimum time at temperature and then rapidly cool the castings in order to enhance the corrosion resistance and meet the required mechanical properties. 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 which the design is based.
A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
However, A imposes some additional requirements:. Upcoming Valve Industry Events Reprints. 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.
Looking for a career in the Valve Industry? Castings shall be heat treated in accordance with the required procedure and heat-treat temperature.
Despite Oil Prices Post: The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. New Washer Application Search Tool. Emerson Completes Acquisition of iSolutions Inc. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A imposes several other requirements that are not included in A nor A A grades will not be added for the same reason. A provides a definition for major weld repairs and requires post-weld heat treatment i.