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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ASTM G28 was designed for nickel-based alloys, and a list of applicable alloys for methods A and B is in the standard. Some suggested criteria for the listed alloys are shown in Table 2, below.
The exception to this is ASTM G28 method A, where rates for the onset of intergranular corrosion are described in reference 1.
Where a standard is included in a purchase specification, this must be followed, although it is advised that unsuitable tests, such ixo the Huey test kso duplex and super austenitic stainless steels, are queried. Nichtrostende ferritische, austenitische und ferritisch-austenitische Duplex- Staehle Korrosionsversuch in schwefelsaeurehaltigen Medien.
Determination of resistance to intergranular corrosion of stainless steels. Contact us by Phone or Email to find isp how we can help your industry.
Intergranular Corrosion Tests for CRAs
Table 1 below shows the various methods for four common standards: Essais de corrosion en milieux contenant de l’acide sulfurique Title in German Ermittlung der Bestaendigkeit nichtrostender Staehle gegen interkristalline Korrosion. You may find similar items within these categories by selecting from 3561-2 choices below:.
ISO is the most rigorous in terms of defining test methods, and says which alloys should use which test methods as follows: The specifications for bend testing are shown in Table 4. More suitable alternatives are offered in Table 5, below. ASTM G28 method B is a more aggressive test than method A and is intended for more corrosion resistant alloys, as listed in the document.
Good material should have a 3651–2 rate substantially less than the threshold value. ISO is specifically for duplex and all austenitic stainless sio, and recommends ageing isi two different temperatures: R Baboian, Corrosion Tests and Standards: It does not say what to do about duplex or super austenitic alloys.
Some standards require the test sample to be aged prior to testing, to simulate the precipitation that might occur 36512 welding. Click to learn more. None of these are identical and cross substitution of results is not possible. When a test has been selected, follow the detailed directions in that standard for making up the test solution, the preparation of test samples and the finish to be used. The effect of post weld surface treatments on the corrosion resistance of super duplex stainless steel welds in sea water ASTM G28 does not require samples to be heat treated.
36651-2 method 3 is a special environment only suitable for the Iwo alloys, as described below, in section 4. Search all products by. Corrosion test in media containing sulfuric acid. You may experience issues viewing this site in Internet Explorer 9, 10 or The most convenient size is often a cylinder 10mm diameter by mm long, but other dimensions are possible to suit particular product forms.
Both of these tests should be followed by water quenching. SEP also gives guidance on which of its methods apply to which alloys: These tests were introduced when the carbon content sn CRAs typically hit 0. The Tests Table 1 below shows the various methods for four common standards: Aciers inoxydables ferritiques, austenitiques et austeno-ferritiques duplex.
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ASTM G28 lists alloys and specifies the test exposure for each. Alternatively, a welded test-piece in the as-welded condition may be tested.
Samples may be rectangular or cylindrical to suit the test vessel, but where a bend test is required, it is suggested that the sample be a minimum of mm long. 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.
As 15 hours is a difficult test period in practice, and is only io minimum, conducting the 36651-2 for 20 hours overnight means that the two tests are equivalent. This document describes all three of these tests for four common standards, and describes the differences. Find Similar Items This product falls into the following categories. Please download Chrome or Firefox or view our browser tips. Conducting the Tests When a test has been selected, follow the detailed directions in that standard for making up the test solution, the preparation of test samples and the finish to be used.
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.
Ermittlung der Bestaendigkeit nichtrostender Staehle gegen interkristalline Korrosion. Worldwide Standards We can source any standard from anywhere in the world. Ferritic, austenitic and ferritic-austenitic duplex stainless steels. Determination de la resistance a la corrosion intergranulaire des aciers inoxydables. For alloys not listed in this standard, it will be necessary enn carry out some tests on material in various conditions to determine the threshold.