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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The choices are listed in Table 1. Current edition approved March 1, For any studies of IGA on Types,orthe indicated test methods are suggested. Add to Alert PDF. 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.
Historical Version s – view previous versions of standard. Please first verify your email before subscribing to alerts. C Preferred criterion, these criteria are the most sensitive for the particular combination of alloy and test.
ASTM A Sensitization Testing of Ferritic Stainless Steel
A copper cradle may also be used. All traces of oxide scale formed during heat treatment must be removed. Supplementary requirements are noted as required. In no case axtm the specimen be bent atm a smaller radius or through a greater angle than that speci? They should have three or four holes in them to increase circulation of the test solution around the specimen. Grind the cross section on wet or dry 80 or grit abrasive paper followed by successively?
Avoid excessive heat when dry-grinding. D Weight loss measurements can be used to detect severely sensitized material, but they are not very sensitive for alloys noted with this superscript and may not detect slight or moderate sensitization.
The test will not differentiate between intergranular attack resulting from carbides and that due to intermetallic phases. If there sstm an appreciable change in the level, repeat the test with fresh solution and a reground specimen. The bend test evaluations for the steel test specimens are presented.
Combinations of alloys and test methods for which successful experience is available are shown in Table. Evaluation by Microscopical Examination The ground-glass opening is somewhat over 38 mm 11? Originally approved in Preparation of Test Specimens A small amount of copper shot eight to ten pieces on the bottom of the?
NOTE 2—Other equivalent means of specimen support such as glass hooks or stirrups may also be used. The choices are listed in Table 1. For specific safety precautionary statements, see 3. Add the acid slowly to the water in the Erlenmeyer? 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. Four practices, including Satm W, X, Y, and Z, are used for determining susceptibility to intergranular attack in ferritic stainless steel.
ASTM A763 – 15
NOTE 6—Measures should be taken to minimize bumping of the solution when glass cradles are used to support specimens. Application of these standard tests to the other ferritic stainless steels will be by specific agreement between producer and user.
It may also be used to evaluate the effectiveness of stabilizing element additions Cb, Ti, etc. This test detects susceptibility to intergranular attack associated with the precipitation of chromium carbides and nitrides in stabilized and unstabilized ferric stainless steels. A visual comparison between these specimens should assist in interpretation. A — 93 Begin timing the test period when the solution reaches the boiling point.
Last previous edition approved in as A — 93 e1. See Sections 30 and The number is limited only by the number a7633 glass cradles that can be?
To avoid scale entrapment, stamp specimens for identi? This possibility must be considered in selecting the test method.
The sample is then rinsed in water and dried. The copper should be washed and degreased before use. If any adherent copper remains on the specimen, it may be removed by a brief immersion in concentrated nitric acid at room temperature.
A — 93 8. Fresh test solution would not be needed if the test were to run 48 aetm 72 h. It may be applied to wrought products and weld metal. During the test, ferric sulfate is consumed at a rate of 10 g for each 1 g of dissolved stainless steel. However, sstm specimens may be tested simultaneously.