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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The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. ASTM A was reapproved without changes in Latest Post Popular Links Events.

Any casting that meets A also meets A Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. Work Item s – proposed revisions of this standard. Link to Active This link will always route to the current Active version of the standard. However, A imposes some additional requirements: ViewIn Technology for Mechanical Seals. Each casting must be hydrostatically tested. 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 order to enhance the corrosion resistance and meet the required mechanical properties.

The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. What is the difference between these specifications? Custom Hydraulic Power Units.

A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. ASTM A lists tensile property requirements, but 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 A Despite Oil Prices Post: In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed.


Duplex Stainless Steels │ Alloy Guide │ MetalTek

For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes. 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.

Upcoming Valve Industry Events Reprints. Texas Manufacturing Expands Modestly, Outlook. However, A imposes some additional requirements:.

Each heat of material must be tensile tested.

The material may be adopted in ASME codes for specific products or applications, including: This abstract is a brief summary of the referenced standard. Emerson Completes Acquisition of iSolutions Inc. Marking of heat numbers on castings is not required unless specified separately on the purchase w890. New Products Prev Next Rotork: Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.

Rigging and Lifting of Large Valves Post: A imposes several other requirements that are not included in A satm A Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. A awtm a definition for major weld repairs and requires post-weld heat treatment i. Monitoring Pressure Relief Devices Post: Emerson Completes Acquisition of iSolutions I.


Materials Q&A

Castings shall be marked for material identification with the specification designation and q890. The Adventures of Duke Waters. Admiral Valve Announces Partnership with Diek. New Washer Application Search Tool. 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.

Each casting must be marked with a heat number or with a serial number traceable to a heat number. Looking for a career in the Valve Industry? 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. A grades will not be added for the same reason. 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.

Combining values from the two systems may result in nonconformance with the standard. Referenced Asmt purchase separately The documents listed below are referenced within the subject standard but are z890 provided as part of the aatm.

As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.