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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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Castings shall be heat treated in accordance with the required procedure and heat-treat temperature.

Materials Q&A

ViewIn Technology for Mechanical Seals. Shale Work Up in U. Each casting must be marked with a heat number or with a serial number traceable to a heat number. A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A 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.

For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes. Castings shall be marked for material identification with the specification designation and grade. New Products Prev Next Rotork: Rigging and Lifting of Large Valves Post: The material may be adopted in ASME codes for specific products or applications, including: Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.


In order to obtain a test report showing the actual chemistry and x890 test results, Supplementary Requirement S12 must also be imposed. Work Item s – proposed revisions of this standard. Texas Manufacturing Expands Modestly, Outlook.

ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed. Each casting must be hydrostatically tested. Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. This abstract is a brief summary of the referenced standard. A grades will not be added for the a809 reason. Marking of heat numbers on castings is not required unless specified separately on the purchase order.

ASTM A was reapproved without changes in Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.

Upcoming Valve Industry Events Reprints. Proper heat a8890 of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.

Despite Oil Prices Post: Any casting that meets A also meets A However, A imposes some additional requirements: Historical Version s – view previous versions of standard.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. What is the difference between these specifications?


Duplex Stainless Steels

Looking for a career in the Valve Industry? A provides a definition for major weld repairs and requires post-weld heat treatment i. Link to Active This link will always route to the current Active version of the standard. A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order.

Monitoring Pressure Relief Devices Post: 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.

The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen.

Duplex Stainless Steels │ Alloy Guide │ MetalTek

Latest Post Popular Links Events. The Adventures of Duke Waters. However, A imposes some additional requirements:. Admiral Valve Announces Partnership with Diek.

ASTM does not give any warranty express or implied or make any atsm that the contents of this abstract are accurate, complete or up to date. Custom Hydraulic Power Units.

Each heat of material must be tensile tested. Emerson Completes Acquisition of iSolutions I.

A imposes several other requirements that are not included in A nor A Combining values from the two systems may result in nonconformance with the standard.