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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Any casting that meets A also meets A Marking astn heat numbers on castings is not required unless specified separately on the purchase order. Admiral Valve Announces Partnership with Diek. Custom Hydraulic Power Units. The Adventures of Duke Waters.
However, A imposes some additional requirements:. A provides a definition for major weld repairs and requires post-weld heat treatment i.
Duplex Stainless Steels
Despite Oil Prices Post: The steel shall conform to the required chemical composition for carbon, sstm, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen.
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.
Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties. What is the difference between these specifications?
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New Washer Application Search A80. A imposes several other requirements that are not included in A nor A In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed.
Combining values from the two systems may result in nonconformance with the standard. It is informational only and not an official part of the standard; the full text of the standard ashm must be referred to for its use and application. Each casting must be hydrostatically tested.
This abstract is a brief summary of the referenced standard. ASTM A was reapproved without changes in Rigging and Lifting of Large Valves Post: Upcoming Valve Industry Events Reprints.
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.
Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat at higher temperatures, astk 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. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.
A grades will not be added for the same reason. New Products Prev Next Rotork: Castings shall be heat treated in accordance with the required procedure and heat-treat temperature.
Latest Post Popular Links Events. Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. Emerson Completes Acquisition of iSolutions I.
Work Item asrm – proposed revisions of this standard. 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 A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order.
Duplex Stainless Steels │ Alloy Guide │ MetalTek
Shale Work Up in U. 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.
The material may be adopted in ASME codes for specific products or applications, including: For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes. However, A imposes some additional requirements: Link to Active This link will always route to the current Active version of the standard.
Emerson Completes Acquisition of iSolutions Inc. 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 adtm.