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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A imposes several other requirements that are not included in A nor A The Adventures of Duke Waters. This abstract is a brief summary of the referenced standard.

Each casting must be hydrostatically tested. Monitoring Pressure Relief Devices Post: Latest Post Popular Links Events. It is informational only and not an official part of the standard; the full ast, of the standard itself must be referred to for its use and application. Marking of heat numbers on castings is not asfm unless specified separately on the purchase order. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.

Referenced Documents purchase separately The asm listed below are referenced within the subject standard but are not provided as part of the 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 order to enhance the corrosion resistance and meet the required mechanical properties.


Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting

A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. Looking for a career in the Valve Industry? Admiral Valve Announces Partnership with Diek. It is the responsibility of the purchaser to determine which grade shall be furnished depending on design and service conditions, a8900 properties, and corrosion-resistant characteristics.

A valve company took exception, and indicated that duplex valve bodies s890 bonnets would be supplied per ASTM A New Washer Application Search Tool.

New Products Prev Next Rotork: Castings shall be marked for material identification with the specification designation and grade.

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Link to Active This link will always route to the current Active version of the standard. For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes.

ASTM A lists tensile property requirements, but does not require that ast tensile tests actually be performed. Custom Hydraulic Power Units. Each heat of material must be tensile tested. Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. 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 s890 based.

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What is the difference between these specifications? As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.

Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.

However, A imposes some additional requirements: A grades will not be added for the same reason.

Materials Q&A

The material may be adopted in ASME codes for specific products or applications, including: Upcoming Valve Industry Events Reprints. Work Item s – proposed revisions of this standard. A provides a definition for major weld repairs and requires post-weld heat treatment i.