ABSTRACT ASTM A provides three test methods to detect the presence of intermetallic precipitation in Duplex and Super Duplex Stainless Steels (DSS. ASTM A provides three methods/practices to determine the extent of intermetallic precipitation in Duplex Stainless Steels. While Practice A. manual Point Count) and ASTM A (Standard Test Methods for Detecting various tests which were carried out were ASTM A Test Method A, B and C .
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Rapid cooling of the product provides the maximum resistance to formation of detrimental phases a9233 subsequent thermal exposures. These tests identify the minimum critical temperature needed to initiate pitting or crevice corrosion. Because the occurrence of intermetallic phases is a function of temperature and cooling rate, it is essential that the tests be applied to the region of the material experiencing the conditions most likely to promote the formation of an intermetallic phase.
A Energy for a full-size specimen. Return to Blog List. Advanced search Show search help. The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece. This abstract is a brief summary of the referenced standard. Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures.
Publishers Content Coverage Privacy. These tests offer a means to evaluate and compare the expected performance of various alloys. Because of the wide experience in the production testing of duplex alloys, testing in accordance with A is recommended. Except for rapidly cooled material, it may be necessary to sample from a location determined to be the most slowly cooled xstm the material piece to be characterized.
Link to Active This link will always route to the current Active version of the standard.
In the case of common heat treatment, this region will be a23 which cooled most slowly. B The acceptable minimum impact energy shall be agreed upon by seller and purchaser. Proceedings of an international conference Oceanology: Required energy for a subsize specimen is reduced in direct proportion to the reduced area of the subsize specimen relative to that of the full-size specimen.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or asgm to date.
The values given in parentheses are for information only. The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece.
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. However, these parameters can be modified to suit individual test needs.
As components in thicker sections were developed for expanding markets, the requirements necessary to obtain a good weld were similarly growing. Proceedings of an international conference Diverless and Deepwater Techology: Recently, use of these alloys has met with challenges, many of them having to do with welding operations. Active view current version of standard.
ASTM A Testing – Detecting Intermetallic Phases in Duplex Steels
These test methods will not necessarily detect losses of toughness or corrosion resistance attributable to other causes. Because the occurrence of intermetallic phases is a function of temperature and cooling rate, it is essential that the tests be applied to the region of the material experiencing the conditions most likely to promote the formation of an intermetallic phase.
When Test Method A is specified as an acceptance test, specimens having other than acceptable etch structures may, at the option of the producer, be tested by Test Method B or Test Method C. Historical Version s – view previous versions of standard. The pH is adjusted to 1. 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.