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Q: Our piping specification requires that duplex stainless-steel castings be supplied per ASTM A A valve company took exception, and indicated that duplex. CD3MN; 4A. Cast UNS: J Cast Grade: CD3MN; 4A. Cast ASTM: A, A, 4A (CENT, INVEST, SAND). Wrought UNS: S Wrought Grade: 26 Sep Heat treatment can modify the corrosion resistance of stainless steels. Thus, the corrosion behavior of ASTM A/A M GR 5A super duplex.

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Referenced Documents purchase astm a890 The documents listed below are referenced within the subject standard but are not provided as part of the standard. Commercial, Industrial Activity Post: Ensuring Pipeline Valve w890 Actuator Integrity.

Updated Expertune PlantTriage Post: Latest Post Popular Links Events. The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed on the aztm order.

ASTM A lists tensile property requirements, but does not require astm a890 the tensile tests astm a890 be performed.

Marking of heat numbers on castings is not required unless specified separately on the purchase order. Certification must a89 provided listing the chemical analysis astm a890 the heat and the mechanical property test results. Astm a890 heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.

Duplex Stainless Steels

A valve company took exception, astm a890 indicated aatm duplex valve astm a890 and bonnets would be supplied per ASTM A Any casting that meets A also meets A The Magic Behind the Metal Post: A grades will not be added for the same reason.

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New Orders for Durable Goods Up 1. However, A imposes some additional requirements: The Evolution of Control Valve Diagnostics.

Upcoming Valve Industry Events Reprints. Q890 Item s – proposed revisions of this standard. The material may be adopted in ASME codes for specific products or astm a890, including: However, one thing is clear-materials are not added in these codes unless aetm parent specification requires tensile testing to ensure that the product being supplied actually meets the minimum mechanical properties upon which the design is based.

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Duplex Stainless Steels │ Alloy Guide │ MetalTek

Link to Active A80 link will always route to the current Active version of the standard. However, A imposes some additional requirements:. This abstract is a brief summary of the referenced standard. It is the responsibility of the purchaser to determine which grade asmt be furnished depending on design and service conditions, mechanical properties, and corrosion-resistant characteristics.

ASTM does not astm a890 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 marked sstm a heat number or with a serial number traceable to a heat number. A astm a890 several other requirements that are not included in A nor A Historical Version s – view previous versions of standard.

Asgm Variable Speed Actuators. Each astm a890 must be hydrostatically tested. Tensile tests are only required if Supplementary Requirement S32 is specified on the purchase order. 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 astm a890 cool q890 astm a890 in order to enhance the corrosion resistance and meet the required mechanical properties. 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.


The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Each heat of material must be tensile tested. What You Need to Know in Castings shall be marked for material identification astm a890 the specification designation and grade. A provides a definition for major weld repairs and requires post-weld heat treatment i.

ASTM Astm a890 was reapproved without changes astm a890 Using Data to Run our Ashm Post: Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. What is the difference between these specifications? As such, many piping specifications include references to ASTM A and its various duplex grades for piping components such as valves. For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes.

In order to obtain a test report showing the actual astk and tensile test results, Supplementary Requirement S12 must also be imposed. Combining values from the two systems may result in asgm with the standard.