ASTM A262-13 PDF

This standard is issued under the fixed designation A ; the number immediately following 1 These practices are under the jurisdiction of ASTM Committee A01 on Steel, containing welds should be cut so that no more than 13 mm (1⁄2. Fast, high-quality ASTM A intergranular corrosion testing run by corrosion experts. ASTM has standardized the test procedure and the specifications are detailed in ASTM A standard (ASTM, ) and ASTM G standard (ASTM.

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These practices include five intergranular corrosion tests, namely: The weight loss asttm calculated after each step, and reveals if the sample has been properly heat-treated. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Intergranular corrosion occurs as a result of precipitation of nitridescarbidesand other intermetallic phasessuch as sigma phase, that occurs along xstm grain boundaries.

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How do you select the right ASTM corrosion testing method for your material? Methods for preparing the test specimens, rapid screening tests, apparatus setup and testing procedures, and calculations and report contents are described for each testing practice. The Z262-13 A tests can determine if the proper heat treatment was performed or if the alloys are in danger of intergranular corrosion occurring in use.

For example, many low-carbon and stabilized stainless steels e. If materials with incorrect heat treatment enter service, they are liable to adtm or fail by intergranular corrosion IGC much more rapidly than properly treated materials; ASTM A is a screening test to help find batches that are incorrectly processed.

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Corrosione intergranulare acciai inox austenitici ASTM A

See Appendix X1 for information regarding test selection. In many cases we can reduce that to as little as 24 hours more than the required testing time if you need fast results.

Contact us now for pricing or a quote! This abstract is a brief summary of the referenced standard. The oxalic acid test a2621-3 commonly used before the Strauss test to determine if a atsm is susceptible; samples that pass method A will generally show low corrosion rates in the Strauss test.

The chart below comes from the Z262-13 A standard for selection of the appropriate test by alloy type:. Historical Version s – view previous versions of standard. A recent publication on intergranular corrosion.

ASTM A Intergranular Corrosion Testing and Analysis

Some specific hazards statements are given in Practice A, the oxalic acid etch test is used as a rapid technique to screen samples of certain stainless steel grades to ensure they are not susceptible to intergranular attack sensitization. The inch-pound equivalents are in parentheses and may be approximate. 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.

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The first and fastest step is the ASTM A Practice A, a rapid same-day screening method in Oxalic acid to determine the susceptibility to intergranular corrosion. Practice F, is a hour weight-loss based analysis that provides a quantitative measure of the materials performance, and is commonly used to analyze as-received stainless steels.

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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. Because it can be run quickly for screening, we often run this test first.

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A262–13 tests are often run as a qualification test to ensure each batch of stainless steel is properly prepared. Duplicate samples from both sides of a sheet sample are evaluated to determine if carburization results in intergranular attack. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Aatm to Active This link will qstm route to the current Active version of the standard.

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. Intergranular corrosion shows up as the dark black lines around the grain boundaries.

This a262–13 includes boiling the sample for 24 to hours in the solution above, and measures the materials performance quantitatively. Please specify the maximum allowable corrosion rate and any available data on the sensitizing heat treatment performed. The Strauss test is commonly used to evaluate the heat-treatment of as-received material, the effectiveness of alloying additions of elements such as Nb and Ti, or the effectiveness of reducing carbon content to resist intergranular attack.

The test evaluates the resistance of extra-low-carbon steels to sensitization and intergranular attack from welding or heat treatment processes. q262-13