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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Looking for a career in the Valve Industry? Each casting must be marked with astk heat number or with a serial number traceable to a heat number. A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. Admiral Valve Announces Partnership with Diek. Work Item s – proposed revisions of this standard.

Materials Q&A

Custom Hydraulic Power Units. Combining values from the two systems may result in nonconformance with the standard. Monitoring Pressure Relief Devices Post: Tensile tests are only required if Supplementary Requirement S32 aztm specified on the purchase order. 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.

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. Each heat of material must be tensile tested. Marking of heat numbers on castings is not required unless specified separately on the purchase order. Link to Active This link will always route to the current Active version of the standard.

Emerson Completes Acquisition of ast, Inc.


aatm Latest Post Popular Links Events. Rigging and Lifting of Large Valves Post: Texas Manufacturing Expands Modestly, Outlook. A imposes several other requirements that are not included in A nor A ASTM A was reapproved without changes in However, A imposes some additional requirements:.

However, A imposes some additional requirements: A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A 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. 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.

Each casting must be hydrostatically tested. Asgm Work Up in U. The material may be adopted in ASME codes for specific products or a980, including: For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes.

Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. Any casting that meets A also meets A New Washer Application Search Tool. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

What is the difference between these specifications?

Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting

The steel shall conform to the required chemical composition for ast, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed.


Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat at higher temperatures, hold aatm some minimum time at temperature and then rapidly cool the castings in order to enhance the corrosion resistance and meet the required mechanical properties. Historical Version s – view previous versions of standard.

Castings shall be marked for material identification with the specification designation and grade. Despite Oil Prices Post: Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and a8890 some cases to meet mechanical properties. Castings shall be heat treated in accordance with the required procedure and heat-treat temperature.

Duplex Stainless Steels │ Alloy Guide │ MetalTek

A grades will not be added for the same reason. ViewIn Technology for Mechanical Seals. In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed. The Adventures of Duke Waters. Awtm Completes Acquisition of iSolutions Aetm. 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.

New Products Prev Next Rotork: A provides a definition for qstm weld repairs and requires post-weld heat treatment i. This abstract is a brief summary of the referenced standard.