Find the most up-to-date version of ISO at Engineering ISOpdf – Download as PDF File .pdf) or read online. ASTM A method E is sometimes called the Strauss test, and is the same as ISO method A, except for the duration. As 15 hours is a difficult test period .
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You may find similar items within these categories by selecting from the choices below:. This document also points out which alloys the tests are intended for, and recommends the most appropriate test when none is specified.
BS EN ISO 3651-2:1998
Contact us by Phone or Email to find out how we can help your industry. Some standards require the test sample to be aged prior to testing, to simulate the precipitation that might occur during welding. Corrosion test in 3651-22 containing sulfuric acid. As 15 hours is a difficult test period in practice, and is only a minimum, conducting the test for 20 hours overnight means that the two tests are equivalent. ISO is specifically for duplex and all austenitic stainless steels, and recommends ageing at two different temperatures:.
The Huey test method C is only for molybdenum-free grades, such as L, as alloys with molybdenum show high rates of attack in this test. Essais de corrosion en milieux contenant de l’acide sulfurique Title in German Ermittlung der Bestaendigkeit nichtrostender Staehle gegen interkristalline Korrosion.
Corrosion test in media containing sulfuric acid Status: Suggested test methods for different corrosion resistant alloys. Hence, it is normally only used for stainless steels intended for nuclear service, or another application involving nitric acid.
Essais de corrosion en milieux contenant de l’acide sulfurique. Search all products by. Where no specific test is specified, Table 5 suggests the most appropriate alongside a second choice, if the first is declined. None of these are identical and cross substitution of results is not possible. It has been used for the duplex stainless steel UNS Swhich has been used for nitric acid cooler tubes. Worldwide Standards We can source any standard from anywhere in the world. The most convenient size is often a cylinder 10mm diameter by mm long, but other dimensions are possible to suit particular product forms.
For many alloys, the onset is at 0. Some suggested criteria for the listed alloys are shown in Table 2, below. It does not say what to do about duplex or super austenitic alloys. Bend test criteria for several standards. There are other requirements in these standards over details that are not discussed in this document, and these should be followed, such as conducting bend tests.
ISO is the most rigorous in terms of defining test methods, and says which alloys should use which test methods as follows:. Selection is a Test Method The test methods in Table 1 were designed with specific alloys in mind, but the proliferation of new CRAs has meant that the selection of a suitable test method is difficult.
Intergranular Corrosion Tests for CRAs
Why were these tests designed? ISO is specifically for duplex and all austenitic stainless steels, and recommends ageing at two different temperatures: ASTM G28 was designed for nickel-based alloys, and a list of applicable alloys for methods A and Izo is in the standard.
SEP also gives guidance on which of its methods apply to which alloys: Alternatively, a welded test-piece in the as-welded condition may be tested.
Good material should have a corrosion rate substantially less than the threshold value. ASTM A was designed for austenitic stainless steels, specifically the series alloys.