Stainless Steels1. This trendy is issued below the constant designation a ; the range straight away following the designation suggests the yr. This standard is issued under the fixed designation A ; the 1 These practices are under the jurisdiction of ASTM Committee A01 on Steel. Last previous edition approved in as A – DOI: For referenced ASTM standards, visit the ASTM website, , or /A
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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. The effect of galvanic coupling between copper and the test specimen may have importance 7. Types,and are nonstabilized grades that are generally not used in the as-welded or sensitized condition in other than mildly corrosive environments.
Such treatment of test specimens is not permissible, except in tests undertaken to demonstrate such surface effects.
For specific safety precautionary statements, see 3. NOTE 5—It may be necessary to embed large specimens, such as from heavy bar stock, in copper shot on the bottom of the test? A — 93 8. To avoid scale entrapment, stamp specimens for identi?
Practice W is used as a screening test to avoid the necessity, for acceptable specimens, of more extensive testing required by Practices X, Y, and Z. A — 93 FIG. All other microscopical examinations are of the corroded surface under binocular examination see Section This test detects susceptibility to intergranular attack associated with the precipitation of chromium carbides and nitrides in stabilized and unstabilized ferric stainless steels.
An air or hydraulic press may also be used for bending the specimens. Application of these standard tests to the other ferritic stainless steels will be by specific agreement between producer and user.
Each sample must be in a separate cradle so that the samples do not touch. A superscript epsilon e indicates an editorial change since the last revision or reapproval. NOTE 3—Loss of vapor results in concentration of the acid. Millimeters per month 3 0. Supplementary requirements are noted as required. If the sample is too thick, multiple specimens should be used.
All traces of oxide scale formed during heat treatment must be removed. Add the acid slowly to the water in the Erlenmeyer?
ASTM A Sensitization Testing of Ferritic Stainless Steel
NOTE 9—Cracking that originates at the edge of the specimen should be disregarded. The choices are listed in Table 1. Last previous edition approved in as A — 93 e1.
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 important to ensure that the concentration of acid does adtm become more concentrated and that an adequate number of boiling chips which are resistant to attack by the test solution are present.
NOTE 2—Other equivalent means of specimen support such as glass hooks or stirrups may also be used. Do not use sand- or grit-blasting. Link to Active This sstm will always route to the current Active version of the standard. This test detects susceptibility to intergranular attack associated with the precipitation of chromium carbides or nitrides in unstabilized and stabilized ferritic stainless steels.
The choices are listed in Table 1. A visual comparison between these specimens should assist in interpretation. Evaluation by Bend Test See Table 1 for a listing of alloys for which Practice W is appropriate.
Preparation of Test Specimens 4. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address atm below.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. A copper cradle may also be used. Specimens with unacceptable microstructures should be subjected to Adtm X, Y, or Z to better determine their susceptibility to intergranular attack. Heavy specimens may require bending in a? The alloys on which the test has been successfully applied are astn in Table 1.
Warning—Protect the eyes and use rubber gloves and apron for handling acid.