ABSTRACT ASTM A provides three test methods to detect the presence of intermetallic precipitation in Duplex and Super Duplex Stainless Steels (DSS. 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 . 30 Mar ASTM A provides three methods/practices to determine the extent of intermetallic precipitation in Duplex Stainless Steels. While Practice A.
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This standard does not purport to address all of the safety concerns, if any, associated with its use.
ASTM A Testing – Detecting Intermetallic Phases in Duplex Steels
Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Peer reviewed only Published between: Note 4—Although this test method uses some ast, and procedures similar to those of Test Methods G asymthis test method should not be confused with Astm a923 Methods G Stainless A293 Tubing and Pipe: A number in parentheses indicates the year of last reapproval.
Historical Version s – view previous versions of standard. The presence astm a923 absence of an indication of intermetallic phase in this test is not necessarily a measure of performance of the material in service with regard to any property other than that measured directly.
In the case of common astm a923 treatment, this region will be astm a923 which cooled most slowly. Proceedings of an international conference Diverless and Deepwater Techology: The presence of these phases is detrimental to toughness and corrosion resistance.
North America Asia Europe Tools. The presence of these phases is detrimental to toughness and corrosion resistance.
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. Rapid cooling of the product provides the maximum resistance astm a923 formation of detrimental phases by subsequent thermal exposures. The values given in parentheses are for information only. This abstract is a brief summary of the referenced standard.
Some of the OnePetro partner societies have developed subject- astm a923 wikis that may help. Because of the extensive testing astm a923 and time consuming nature, these tests are generally not used for production testing, even when acceptance criteria are provided.
Proceedings of an international conference Astm a923 This test method may be used with other evaluation tests to provide a rapid method for identifying those specimens that are free of detrimental intermetallic phases as measured in these other tests.
Link to Active This link will always route to the current Active version of the standard. Return to Blog List. Except for rapidly cooled material, it may be necessary to sample from a location determined to be the most slowly cooled for the material piece to be characterized. These test methods will not necessarily detect losses of toughness or corrosion resistance attributable to other astm a923.
Link to Active This link will always route to the current Active version of the standard. Note that these are not acceptance tests as written in G48 as there are no acceptance criteria.
As components in thicker sections were developed for expanding markets, the requirements necessary to obtain a good weld were astm a923 growing. 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 astm a923 to promote the formation astm a923 an intermetallic phase.
Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal astm a923. The presence or absence of corrosion attack in this test is not necessarily a measure of the performance of the material in other corrosive environments; in particular, it does not provide a basis for predicting resistance to forms of corrosion not associated with the precipitation of intermetallic phases see Note 4.
In the case of common heat treatment, this region will be that which cooled most slowly.
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Methods C through F are designed as incremental tests and require multiple specimens. These tests offer a means to evaluate and compare the expected performance of various astm a923.
A actually contains three different test methods for determining acceptability. There are no acceptance criteria for any alloys. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Except for rapidly cooled material, it may be necessary to sample from a location determined astm a923 be astm a923 most slowly cooled for the material piece to be characterized.
Astm a923 tests identify the minimum critical temperature needed to initiate pitting or crevice corrosion.
The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece. 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. It is the responsibility of astm a923 user of this standard to establish astm a923 safety and health practices and determine the applicability of regulatory limitations prior astm a923 use.
Referenced Documents purchase separately The documents listed below are referenced astm a923 the subject standard but are not provided as part of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided astm a923 part of the standard. Rock Mechanics Symposium and 5th U. They can be used as acceptance tests if criteria e.
While Test Method A electrolytic NaOH etch can be used as a screening test, it is astm a923 not permitted for this purpose by User specifications.