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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Historical Version s – view previous versions of standard.

How do you select the right ASTM corrosion testing method for your material? The oxalic acid test is commonly used before the Strauss test to determine if a sample is susceptible; samples that pass method A will generally show low corrosion rates in the Strauss test. A262-31 samples from both sides of a sheet sample are evaluated to determine if carburization results in intergranular attack.

Based on your materials, application, and requirements, the other 4 methods provide specific focuses. Each ASTM A Practice specification includes a list of the grades of stainless steels and the acceptable etch structures for the specific alloys. Practice B, also known as the Streicher test, uses weight loss analysis to provide a quantitative measure of the materials performance. Work Item s – proposed revisions of this standard. Please share this page: Because it can be run quickly for a2262-13, we often run this test first.

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This specification covers the standard practices for detecting susceptibility to intergranular attack in xstm stainless steels. If you are not sure, please contact us ast, assistance.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. In many cases we can reduce that to as little as 24 hours more than the required testing time if you need fast results.

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The Huey test works well to analyze chromium depleted regions and intermetallic precipitates, such as sigma phase, and is also used for materials in strongly oxidizing environments such as nitric acid.

A recent publication on intergranular corrosion.

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. In SEM analysis, intergranular corrosion is clear by the dark lines where the grain boundaries are eaten away. 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.

In everyday applications, corrosion varies by materials and solutions. The weight loss is calculated after each step, and reveals if the sample has been properly heat-treated. Share on A226-13 Print. The test evaluates the resistance of extra-low-carbon steels to sensitization and intergranular attack from welding or heat treatment processes.

Corrosione intergranulare acciai inox austenitici ASTM A

Classification of the structure after A Practice A analysis will determine if the material is acceptable or if additional testing is required. It is typically used for stainless alloys such as andCr-Ni-Mo stainless alloys, and nickel alloys to evaluate the intergranular attack associated with the precipitation of chromium carbides at grain boundaries.

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 test is generally performed for acceptance of materials, but not sufficient for rejection of materials. The ASTM A tests can determine if the proper heat treatment was performed or if the alloys are in danger of intergranular corrosion occurring in use.

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Resistance to Intergranular Corrosion of Austenitic Stainless Steels

Contact us now for pricing or a quote! Link to Active This link will always route to the current Active version of the standard. The chart below comes from the ASTM A standard for selection of the appropriate test by alloy type:.

If materials with incorrect heat treatment enter service, they are liable to crack 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.

It depends on which Practice is selected, but typically ranges from to days for different tests. 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 Intergranular Corrosion Testing and Analysis

a22-13 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. See Appendix X1 for information regarding test selection.

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 the grain boundaries.

The inch-pound equivalents are in parentheses and may be approximate.