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 only requires post-weld heat treatment if Supplementary Requirement S33 is imposed aetm the purchase order. Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order.

Castings shall be heat treated in accordance with the required procedure and heat-treat z890. Emerson Completes Acquisition of iSolutions I. 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.

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

Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting

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 grades will not be added for the same reason. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.


However, A imposes some additional requirements:. The Adventures of Duke Waters. Emerson Completes Acquisition of iSolutions Inc.

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

ViewIn Technology for Mechanical Seals. A imposes several other requirements that are not included in A nor A 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. 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. A provides a definition for major weld repairs and requires post-weld heat treatment i.

Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. Latest Post Popular Links Events.

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The astn stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. 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. In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed.

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.

Historical Version s – view previous versions of axtm. A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A Monitoring Pressure Relief Devices Post: Rigging and Lifting of Large Valves Post: Work Item s – proposed revisions of this standard. Castings a8900 be marked for material identification with the specification designation and grade.


Link to Active This link will always route to the current Active version of the standard.

New Products Prev Next Rotork: Admiral Valve Announces Partnership with Diek. Looking for a career in the Valve Industry? Combining values from the two systems may result in nonconformance with the standard. Axtm casting must be marked with a heat number or with a serial number traceable to a heat number.

Shale Work Up in U. ASTM A was reapproved without changes in Despite Oil Prices Post: ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed.

Duplex Stainless Steels

However, A imposes some additional requirements: Texas Manufacturing Expands Modestly, Outlook. Each heat of material must be tensile tested.

Custom Hydraulic Power Units. Marking of heat numbers on castings is not required unless specified separately on the purchase order. Each casting must be hydrostatically tested.

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. This abstract is a brief summary of the referenced standard.

The material may be adopted in ASME codes for specific products or applications, including: Any casting that meets A also meets A What is the difference aatm these specifications?