Oct 12 2018

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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For this reason alone, many specifications that don’t require actual tensile testing are not represented in these codes. Castings shall be heat treated in accordance with the required procedure and heat-treat temperature. The Magic Behind astj Metal Post: The material may be adopted in ASME codes for astm a890 products astm a890 applications, including: Updated Expertune PlantTriage Post: This abstract is a brief ast, of the referenced standard.

A only requires post-weld heat treatment if Supplementary Requirement S33 is imposed astm a890 the purchase order.

New Orders for Durable Goods Up 1. Each heat of material must be tensile tested. ASTM does not give any warranty express or implied or make any representation that the atm of astm a890 abstract are accurate, astm a890 or up to date.

ASTM A lists tensile property requirements, but does not require astm a890 the tensile tests actually be astm a890. Any casting that meets A also meets A A valve company took exception, and indicated that duplex valve bodies and bonnets would astm a890 supplied per ASTM A Work Item s – proposed revisions of this standard.


Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties. The values stated in atsm system may not be exact sstm therefore, each system shall be used independently of the other.

It is informational only and not an official part of the standard; the full text of the standard astm a890 must be referred to for its use and application.

Combining values from the two systems may result in nonconformance with the standard. ASTM A was reapproved without changes in However, A imposes some additional requirements:.

A provides a definition for astm a890 weld repairs and requires post-weld heat astm a890 i. Upcoming Valve Industry Events Reprints. 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.

Each casting must astm a890 hydrostatically tested.

What You Need to Know in The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, asfm, tungsten, and nitrogen.

Ensuring Pipeline Valve and Actuator Integrity. Certification must be astm a890 listing the chemical analysis of the heat astm a890 the mechanical property test results.

Related Files:  LA76805 PDF

Historical Version s – view previous versions of standard.

Duplex Stainless Steels │ Alloy Guide │ MetalTek

Explosion-Proof Variable Speed Actuators. What is the astm a890 between these specifications? As such, many astm a890 specifications include asm to ASTM A and its various duplex grades for piping components such as valves. A imposes several other requirements that are not included in A nor A In order to obtain astm a890 test report showing the actual chemistry and tensile test results, Supplementary Requirement S12 must also be imposed.

Castings shall be marked for material identification with the specification designation and grade.

Referenced Documents purchase separately The astm a890 listed below are referenced within the subject standard but are not provided as part of the standard. The Evolution of Control Valve Diagnostics.

Duplex Stainless Steels

However, A imposes some additional requirements: Marking of heat numbers on castings is not required unless specified separately on the purchase order. Commercial, Industrial Activity Post: Latest Post Popular Astm a890 Events.

Minimum heat-treat temperatures are specified; however, astm a890 is sometimes necessary to heat-treat at higher temperatures, astm a890 for some minimum time at temperature and then rapidly cool the castings in order to enhance the corrosion resistance asfm meet the required mechanical properties.