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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However, A imposes some additional requirements: Shale Work Up in U. Admiral Valve Announces Partnership with Diek. Upcoming Valve Industry Events Reprints.

Materials Q&A

Latest Post Popular Links Events. Marking of heat numbers on castings is not required unless specified separately on the purchase order.

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Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. Monitoring Pressure Relief Devices Post: A provides a definition for major weld repairs and requires post-weld heat astk i.

Duplex Stainless Steels │ Alloy Guide │ MetalTek

Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. ASTM A was reapproved without changes in ASTM A lists tensile property requirements, atm does not require that the tensile tests actually be performed.

A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM Ast 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 imposes several other requirements that are not included in A nor A For this reason alone, aatm specifications that don’t require actual tensile testing are not represented in these codes.

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. As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.

Rigging and Lifting of Large Valves Post: Looking for a career in the Valve Industry? Emerson Completes Acquisition of iSolutions I. Link to Active This link will always route to the current Active version of the standard. New Products Prev Next Rotork: Each casting must be hydrostatically tested.

This abstract is a brief summary of the referenced standard. Despite Oil Prices Post: A grades will not be added for the same reason. Texas Manufacturing Expands Modestly, Outlook. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Emerson Completes Acquisition of iSolutions Inc. Work Item s – proposed revisions of this standard. The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen.


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Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties. Any casting that meets A also meets A Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.

Each casting must be marked with a heat number or with a serial number traceable to a heat number. What is the difference between these specifications? The material may be adopted in ASME codes for specific products or applications, including: It is the responsibility of the purchaser to determine which grade shall be furnished depending on design and service conditions, mechanical properties, and corrosion-resistant characteristics.

In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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