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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Test Method C in A is a ferric chloride pitting w923. 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 atsm the material experiencing the conditions most likely to promote the formation of an intermetallic phase.
The values given in parentheses are for information only. 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. As components in thicker sections were developed for expanding markets, the requirements necessary to obtain a good weld were similarly growing. Proceedings of awtm International Conference Submersible Technology: While Test Method A electrolytic NaOH etch can be used as a screening test, it is sometimes not permitted for this purpose by User specifications.
The presence or absence of an indication of intermetallic phase in this test astn not necessarily a measure of performance of the material in service with regard to any property other than that measured directly.
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Note that these are not acceptance tests as written in G48 as there are no acceptance criteria. There are no acceptance criteria for any alloys. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Publishers Content Coverage Privacy.
The Validity of Using ASTM A Practice for Weld Procedure Qualification of Duplex SSs
Test method A-sodium hydroxide etch test, test method B-Charpy impact test, and test method C-ferric chloride corrosion test shall xstm made for classification of structures of duplex stainless steels. Log in to your subscription Username.
ASTM A was implemented to assess the presence of intermetallic phases in base material, but has also been used for weld qualification. This abstract is a brief summary of the referenced standard.
Ferric Chloride Corrosion Testing – Rolled Alloys, Inc.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. They can be used as acceptance tests if criteria e.
Proceedings of an international conference Oceanology: ASTM does asym give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
The presence of these phases is detrimental to toughness and corrosion resistance. These tests identify the minimum critical temperature needed to initiate pitting or crevice corrosion.
Because of the wide experience in the production testing of duplex alloys, testing in accordance with A is recommended. 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.
The Charpy procedure as here applied is different from that as commonly applied for the determination of toughness and should not be used when characterization of material toughness is the purpose of the testing.
It is well known that the precipitation of intermetallics such as sigma phase and chi phase can promote loss of toughness, and loss of corrosion resistance. Methods C through F are designed as incremental tests and require multiple specimens.
This test method does not determine the critical pitting temperature or test for the suitability for use in axtm particular environment. Link to Active This link will always route to the current Active version of the standard. Active view current version of standard. In the case of common heat treatment, this region will be that which cooled most slowly. Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition. The values given in parentheses are for information q923.
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. These test methods will not necessarily detect losses of toughness or corrosion resistance attributable to other causes. Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Rock Mechanics Symposium and 5th U.
Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A Energy for a full-size specimen.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The pH is adjusted to 1.