ASTM A262-10 PDF


Designation: A – 10 Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels1 This standard is. ASTM, 16 p, A Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels Abstract This. ASTM A – Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels Thanks in advance.

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Each ASTM A Practice specification includes a list of the grades of stainless steels and the acceptable etch structures for the specific alloys.

These astj may contain grades of steels in addition to those given in the rectangles. The test uses a visual inspection of the surface of the bent specimen to determine pass or fail. Based on your materials, application, and requirements, the other 4 methods provide specific focuses. The solution volume-to-sample area ratio is to be maintained.

The ground glass opening is somewhat over 38 mm 11?

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Such specimens have low corrosion rates in the various hot acid tests, requiring from 4 to h of exposure. The tests can be astj without interruption. If there is an appreciable change in the level, the test must be repeated with fresh solution and a reground specimen. After exposure in a262-100 boiling solution, the specimen is bent. However, any susceptibility to intergranular attack is readily detected by pronounced ditches.

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. One of these consists of a 1-L Erlenmeyer?

Practice E, the Strauss test, is performed to assess attack associated with chromium-rich carbide formation; it does not detect susceptibility to sigma phase formation. 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.

Such weight-loss determinations should be made with the accuracy prescribed in Share on Tumblr Print. Begin timing the test period when the solution reaches the boiling point. The test does not provide a basis for predicting resistance to forms of corrosion other than intergranular, such as general corrosion, pitting, or stress-corrosion cracking.

The copper should be washed and degreased before use. The test evaluates the resistance of extra-low-carbon steels to sensitization and intergranular attack from welding or heat treatment processes.

The chart below comes from the ASTM A standard for selection of the appropriate test by alloy type:. It may also be used to check the effectiveness of stabilizing columbium or titanium additions and of reductions in carbon content in preventing a22-10 to rapid intergranular attack.

A — 10 completely. G2MT Labs is one of the few labs to offer all five ASTM A corrosion testing practices, as well as the expertise to help you determine which tests to use, what to do if a test fails, and other corrosion consulting as needed. NOTE 13—For routine evaluations, it is acceptable to test as many as three specimens in the same container provided that they all are of the same grade and all show satisfactory resistance to corrosion.

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ASTM A Intergranular Corrosion Testing and Analysis

NOTE 14—If the multi-sample testing apparatus see Note 10 is employed, a large number of specimens may be tested in the large container provided. NOTE 17—Conversion factors to other commonly used units for corrosion rates are as follows: Therefore, even though the grain boundaries all have step structures, specimens having as much or more end grain pitting than that shown in Fig. The length of time of heating used for this sensitizing treatment determines the maximum permissible corrosion rate for such grades in the ferric sulfate-sulfuric acid test.

All stainless grades listed in the accompanying table may be evaluated in these combinations of screening and corrosion tests, except those specimens of molybdenum-bearing grades for exampleL,and Lwhich represent steel intended for use in nitric acid environments.

A trip balance may be used. If astj are not sure, please contact us for assistance. NOTE 7—Loss of vapor results in concentration of the acid. This test also reveals susceptibility to end grain attack in all grades of stainless steels.