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Q: A customer has asked whether we can supply carbon and alloy steel valve bodies meeting Supplemental Requirement S23 in ASTM A What is the. fication, shall apply to steel castings for pressure-containing Specification A and SI units for material ordered to parts under each of the following ASTM. Buy ASTM A /AM: SPECIFICATION FOR STEEL CASTINGS, GENERAL REQUIREMENTS, FOR PRESSURE-CONTAINING.

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A complex casting with relatively thin walls may experience slower cooling rates than a simple casting with the same wall thickness because the complex casting will lose heat through the mold less effectively. Heats with severity levels 4 and lower are acceptable. Upcoming Valve Industry Events Reprints. Despite Oil Prices Post: After machining, each casting shall be tested under specified hydrostatic shell test pressures in the applicable steel rating for which the casting is designed.

Standard Specification for Steel Castings, General Requirements, for Pressure-Containing Parts

Although some foundries monitor nitrogen levels in their steel, many do not have the necessary equipment to do this. Emerson Completes Acquisition of iSolutions I.

One tension test shall be made from each heat, and shall conform to the tensile requirements specified. The mechanical test methods and definitions are presented in details. ASTM does not give any warranty express or implied or make any representation that the astmm of this abstract are accurate, complete or up to date.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Shale Work Up in U. It has also been found thathigher levels of phosphorus, sulfur,boron, molybdenum and copper inhibitaluminum nitride embrittlement.


Steel Castings, Martensitic Stainless and Alloy, for. Monitoring Pressure Relief Devices Post: Admiral Valve Announces Partnership with Diek. Pressure-Containing Parts, Suitable for High.

The resulting etched specimen is compared with 10 reference macrographs.

The Adventures of Duke Waters. Containing Parts, Suitable for Low-Temperature. Latest Post Popular Links Events. The presence of these elements results in the formation of oxide compounds, which mitigates the formation of oxygen gas bubbles adtm solidification.

Castings, Iron-Nickel-Chromium and Nickel.

Certain elements are aa703 to inhibit the formationof aluminum nitride. 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. Most foundries have the equipment necessary to analyze and report aluminum content.

Custom Hydraulic Power Units. Therefore, the nitrogen content of the steel is often not known or reported, and it is possible that enough nitrogen is present to form aluminum nitride. In order to avoid castings with excessive gas porosity, the foundry may add deoxidizing elements to the melt.

ViewIn Technology for Mechanical Seals. Combining values from the two systems may result in nonconformance with the standard. One of the elements that is sometimes q703 as a deoxidizer is aluminum, which creates a potential for the formation of aluminum nitride. Emerson Completes Acquisition of iSolutions Inc.

Supplemental Requirement S23 in ASTM A

The steel shall be made by open-hearth or electric-furnace process, with or without separate refining such as argon-oxygen-decarburization AODunless otherwise designated by the individual specification. E Reference Radiographs for Aastm to 12 in. Test coupons shall be cast from the same heat as the castings represented, except that for investment castings, the test coupons shall be cast in the same type of mold as the castings.


The material shall conform to the specified chemical composition requirements. This specification covers steel castings, general requirements, for pressure-containing parts.

When the metal is poured into the casting mold, the oxygen can come out of the solution and form gas porosity in the castings. The macroetch test specified in Supplemental Requirement S23 in ASTM A is designed to detect the occurrence of aluminum nitride embrittlement in castings.

This abstract is a brief summary of the referenced standard. Ferritic and martensitic steel shall be cooled after pouring to provide substantially complete transformation of austenite prior to heat treatment to enhance mechanical properties.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently astn the other. Variables That Influence Embrittlement There are a number of variables that influence the potential for this type of embrittlement: Texas Manufacturing Expands Modestly, Outlook. Link to Active This link will always route to the current Active version of the standard.