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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Resistance to Intergranular Corrosion of Austenitic Stainless Steels

Practice B, also known as the Streicher test, uses weight loss analysis to provide a quantitative measure of the materials performance. Duplicate samples from both sides of a sheet sample are evaluated to determine if carburization results in intergranular attack.

Historical Version s – view previous versions of standard. 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.

These tests are often run as a qualification test to ensure each batch of stainless steel is properly prepared. The Strauss test is commonly used to evaluate the heat-treatment of as-received material, the aastm of alloying additions of elements such as Nb and Ti, or the effectiveness ashm reducing carbon content to resist intergranular attack.

Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Share on Tumblr Print.

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. These practices include five intergranular corrosion tests, namely: See Appendix X1 for information regarding test selection. Contact us now for pricing or a quote!

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The test uses a visual inspection of the surface of the qstm specimen astmm determine pass or fail. Some specific hazards statements are given in Intergranular corrosion occurs as a result of precipitation of nitridescarbidesand other intermetallic phasessuch as sigma phase, that occurs along the grain boundaries.

Based on your materials, application, and requirements, the other 4 methods provide specific focuses. The bent samples are examined at low magnification, where the appearance of cracks or fissures indicate intergranular attack. Please specify the maximum allowable corrosion rate and any available data on the sensitizing heat treatment performed.

G2MT Laboratories

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.

It depends on which Practice is selected, but typically ranges from to days for different tests. A recent publication on intergranular corrosion. Due to the variance of attack in different materials, numerous methods Practices B-F are used to assess intergranular corrosion. How do you select the astk ASTM corrosion testing method for your material? What is your typical turnaround time?

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

Link to Active This link will always route to the current Active version of the standard. The test is generally performed for acceptance of materials, but not sufficient for rejection of materials.

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Work Item s – proposed revisions of this standard. 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. Please share this page: If you are not sure, please contact us for assistance.

Corrosione intergranulare acciai inox austenitici ASTM A

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

For example, in highly oxidizing solutions, intergranular attack can occur due to intermetallic phases, while attack of carbides may occur somewhat less oxidizing solutions. In everyday applications, corrosion varies by materials and solutions.

The test evaluates the a262–13 of extra-low-carbon steels to aa262-13 and intergranular attack from welding or heat treatment processes.

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 asfm. For example, many low-carbon and stabilized stainless steels e.