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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Historical Version s – view previous versions of standard.

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 w890 to enhance the corrosion resistance and meet the required mechanical properties.

Looking for a career in the Valve Industry? Work Item s – proposed revisions of this standard.

Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting

New Products Prev Next Rotork: This abstract is a brief summary of the referenced standard. However, A imposes some additional requirements: The material may be adopted in ASME codes for specific products or applications, including: The Adventures of Duke Waters. For this reason alone, ashm specifications that don’t require actual tensile testing are not represented in these codes.


Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. Referenced Documents purchase separately The documents listed below are referenced within ast subject standard but are not provided as part of the standard. A provides a definition for major weld repairs and requires post-weld heat treatment i.

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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.

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Duplex Stainless Steels

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. Latest Post Popular Links Events. Shale Work Up in U. Texas Manufacturing Expands Modestly, Outlook. ViewIn Technology for Mechanical Seals.

Each heat of material must be tensile tested. A valve company took exception, and indicated that duplex valve bodies aa890 bonnets would be supplied per ASTM A Each casting must be marked with a heat number or with a serial number traceable to a heat number. Castings shall be marked for material identification with the specification designation and grade.


Materials Q&A

What is the difference between these specifications? Link to Active This link will always route to the a8900 Active version of the standard. Each casting must be hydrostatically tested. Rigging and Lifting of Large Valves Post: 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.

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. In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed.

Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. However, A imposes some additional requirements:. Astmm A was reapproved without changes in The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. Emerson Completes Acquisition of iSolutions I.