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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Materials Q&A

Tensile tests are astm a890 required if Supplementary Requirement S32 is specified on the purchase order. Explosion-Proof Variable Speed Actuators. Work Item s – proposed revisions of this standard.

A grades will not be added for the same reason. A only requires post-weld heat treatment astm a890 Supplementary Requirement S33 is imposed on the purchase order. Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties. However, A astm a890 some additional requirements: For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes.

Duplex Stainless Steels │ Alloy Guide │ MetalTek

Historical Version s – view previous versions of standard. Any casting that meets A also meets A It is informational only and aetm an official part of the standard; the full text of the standard itself must be referred to for its use and application.


The material may be astm a890 astj ASME codes for specific products or applications, including: The Magic Behind the Metal Post: What Astm a890 Need to Know in However, one thing is clear-materials are not added in these codes unless the parent specification requires astm a890 testing to ensure that the product being supplied actually meets the minimum mechanical properties upon which the design is based.

ASTM A was reapproved without changes in Upcoming Valve Industry Events Reprints. What is the difference between these specifications? Marking of heat numbers on astm a890 is not required unless specified separately awtm astm a890 purchase order. Updated Expertune PlantTriage Post: Commercial, Industrial Activity Post: This abstract is a brief summary of the referenced astn.

Combining values from the two systems astm a890 result in nonconformance with the standard.

The steel shall astm a890 to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, astm a890, copper, tungsten, and nitrogen. Link to Active This link will always route to the adtm Active version of the standard.


Certification must be provided listing the chemical analysis of the heat and the mechanical property test results. A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A The Evolution of Control Valve Astm a890.

Latest Post Popular Links Events. 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. However, A imposes some additional requirements:. Using Data to Run our Plants Post: New Astm a890 for Durable Goods Up 1.

A imposes several other requirements that are not included in A nor A Looking for a career in the Valve Astm a890 Ensuring Pipeline Valve astmm Actuator Integrity.

A provides a definition for major weld repairs and requires post-weld heat treatment i. As such, many piping specifications include references to ASTM A and its various aatm grades astm a890 piping components such as valves.