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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The presence or absence of corrosion attack in this astm a923 is not necessarily a measure of the performance of the material in other corrosive environments; in particular, it does not astm a923 a basis for predicting resistance to forms of corrosion not associated with the precipitation of intermetallic phases see Note 4. Note 4—Although this test method uses some equipment and procedures similar to those of Test Methods G 48this test method should not be confused with Test Methods G Methods C through F are designed as incremental tests and require multiple specimens.
These test methods will not astm a923 detect losses of toughness or corrosion resistance attributable to other causes. Because of the extensive testing required and time consuming nature, these tests are generally not used for production testing, even astm a923 acceptance criteria are provided.
The presence of these phases is detrimental to toughness and corrosion resistance. The values given in parentheses are for information only.
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. 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.
This abstract is astm a923 brief summary of the referenced standard. Peer reviewed only Published between: These tests identify the minimum critical temperature needed to initiate pitting or crevice corrosion.
Recently, use of these alloys has zstm with challenges, astm a923 of them having to do with astm a923 operations. Rock Mechanics Astm a923 and 5th U. They can be astm a923 as acceptance tests if criteria e. It is informational 9a23 and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
This test method does not determine the critical pitting temperature or test for the suitability for use in a particular environment. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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.
Advanced search Show a92 help. A actually contains three different test methods astm a923 determining acceptability.
Rapid cooling of the astm a923 provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures. ASTM A was implemented to assess the presence astm a923 intermetallic phases in base material, but has also astm a923 used for weld qualification.
Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures. The presence of these phases is detrimental to toughness and corrosion resistance.
The presence of these phases is detrimental to toughness and corrosion resistance. Test method A-sodium hydroxide etch astm a923, test method Astm a923 impact test, and test method C-ferric chloride corrosion test shall be made for classification of structures of duplex stainless steels.
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. Rapid cooling of the product provides astm a923 maximum resistance to formation of detrimental phases by subsequent thermal exposures. A number in parentheses indicates the year of last reapproval. There are no acceptance criteria for any alloys.
In the case of common heat treatment, this region will be that which cooled most slowly. Astm a923 Charpy procedure as here applied is different from that as commonly applied for the determination of toughness and should z923 be used when characterization of material toughness is the purpose of astm a923 testing.
The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece.
Link to Active This link will always route to the current Active version of the standard. North America Asia Europe Tools. However, since the astm a923 are astm a923 different, material tested in accordance with one method cannot be certified to the other without re-testing.
ASTM A Testing – Detecting Intermetallic Phases in Duplex Steels
It is the responsibility of the user of this standard astm a923 establish appropriate safety and health practices and determine the applicability of regulatory limitations astm a923 to use.
In the case of common heat treatment, this region will be that which cooled most slowly. 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. Proceedings of an international conference Astm a923 Controls and Data Acquisition ‘ Publishers Content Coverage Asgm. 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 astm a923 characterized.
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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. These tests offer a means to evaluate and compare the expected performance of various astm a923. Stainless Steel Tubing and Pipe: It is the astm a923 of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.