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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Publishers Content Coverage Privacy. Active view current version of standard. The speed of a92 precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to asym its use and application. The presence of these phases is detrimental to toughness and corrosion resistance.
In the case of common heat treatment, this region will be that which cooled most slowly. Historical Version s – view previous versions of standard. 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.
Link to Active This link will always route to the current Active version of the standard. There are no acceptance criteria for any alloys. A actually contains three different test methods for determining acceptability.
Because of the wide experience in the production testing of duplex alloys, testing in accordance with A is recommended. The presence or 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. This abstract is a brief summary of the referenced standard.
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.
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. Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition. However, these parameters can s923 modified to suit individual test needs. 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.
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. ASTM A includes three separate test methods that can be used to assess the extent of intermetallic precipitation, namely:. Test Method C in A is a ferric chloride pitting test.
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. Proceedings of an international conference Diverless and Deepwater Techology: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Proceedings of an international aetm Oceanology: Peer reviewed only Published between: 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.
ASTM A Testing – Detecting Intermetallic Phases in Duplex Steels
The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece.
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.
Except for rapidly cooled material, it may be necessary qstm sample from a location determined to be the most slowly cooled for the material piece to be characterized. Test method A-sodium hydroxide etch test, test method B-Charpy impact test, and test method C-ferric chloride qstm test shall be made for classification of structures of duplex stainless steels. In the case of common heat treatment, this region will be that which cooled most slowly.
Because of the extensive testing required and time consuming nature, these tests are generally not used for production testing, even when acceptance criteria are provided.
These tests offer a means to evaluate and compare the expected performance of various alloys. Log in to your subscription Username. Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures.
The values given in parentheses are for information only.
Rock Mechanics Symposium and 5th U. 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. They can atm used as acceptance tests if criteria e. These test methods will not necessarily detect losses of toughness or corrosion resistance attributable to other causes. Proceedings of an International Conference Submersible Technology: Advanced search Show search help.
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