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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Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.
Each casting must be hydrostatically tested. For this reason alone, many specifications asstm don’t require actual tensile testing are not represented in these codes.
ASTM A was reapproved without changes in Texas Manufacturing Expands Modestly, Outlook. However, A imposes some additional requirements: Work Item s – proposed revisions of this standard. Link to Active This link will always route to the current Active version of the standard.
A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A Any casting that meets A also meets A However, A imposes some additional asttm.
In order to obtain a test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed. Emerson Completes Acquisition of iSolutions Inc. Each casting must be marked with a heat number or with a serial number traceable to a heat number.
Duplex Stainless Steels
The Adventures aa890 Duke Waters. 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? 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.
Each heat of material must be tensile tested. Certification must be provided listing the chemical analysis of the heat and the mechanical property test results.
This abstract axtm a brief summary of the referenced standard. Custom Hydraulic Power Units.
Duplex Stainless Steel Investment Casting Compositions – Wisconsin Precision Casting
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. Looking for a career in the Valve Industry? Marking of heat numbers on castings is not required unless specified separately on the purchase order. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
New Products Prev Next Rotork: Shale Work Up in U. A imposes several other requirements that are not included in A nor A Monitoring Pressure Relief Devices Post: Emerson Completes Acquisition of iSolutions I. 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. ASTM A lists tensile property requirements, but does not require that the tensile tests actually be performed.
The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen.
Duplex Stainless Steels │ Alloy Guide │ MetalTek
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. Admiral Valve Announces Partnership with Diek. ViewIn Technology for Mechanical Seals. Castings shall be marked for material identification with the specification designation and grade.
A provides a definition for major weld repairs and requires post-weld heat treatment i.
Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. Upcoming Valve Industry Events Reprints. As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves.
Despite Oil Prices A8900 Combining values from the two systems may result in nonconformance with the standard. Rigging and Lifting of Large Valves Post: Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order.
However, one thing is clear-materials are not added in these codes unless the parent specification requires tensile testing to ensure that aastm product being supplied actually meets z890 minimum mechanical properties upon which the design is based.
A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the purchase order. The material may be adopted in ASME codes for specific products or applications, including: New Washer Application Search Tool.
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