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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BS EN ISO 3651-2:1998
Where a standard is included in a purchase specification, this must be followed, although it is advised that unsuitable tests, such as the Huey test for duplex and super austenitic stainless steels, are queried. Click to learn more. You may experience issues viewing this site in Internet Explorer ej, 10 or 3651-22 Bend test criteria for several standards.
This test should be avoided for most CRAs, except in the circumstances described below, in section 4. ASTM G28 lists alloys and specifies the test exposure for each. Some standards require the test sample to be aged prior to testing, to simulate the precipitation that might occur during welding. You may find similar items within these categories by selecting from the choices below:.
The most convenient size is often a cylinder 10mm diameter by mm long, but other dimensions are possible to suit particular product forms. Learn more about the cookies we use and how to change your settings. For alloys not listed in this standard, it will be necessary to carry out some tests on material in various conditions to determine the threshold. ISO is the most rigorous in terms of defining test methods, and says which alloys should use which test methods as follows: 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.
Nichtrostende ferritische, austenitische und ferritisch-austenitische Duplex- Staehle Korrosionsversuch in schwefelsaeurehaltigen Medien. ASTM A was designed for austenitic stainless steels, specifically the series alloys.
For an alloy that is not listed, look for 3651-22 alloy with a similar composition to a listed alloy to determine the most suitable test. Search all products by. 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.
The specifications for bend testing are shown in Table 4. Just remember that these tests were devised for specific groups of alloys and should not be applied to all CRAs! It can be seen that some alloys fall into two categories, and no guidelines are given for selecting the most appropriate.
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. Good material should have a corrosion rate substantially less than the threshold value. Hence, it is normally only used for stainless steels intended for nuclear service, or another application involving nitric acid.
Find Similar Items This product falls into the following categories. Determination de la resistance a la corrosion intergranulaire des aciers inoxydables. More suitable alternatives are offered in Table 5, below.
Corrosion test in media containing sulfuric acid Status: The Tests Table 1 below shows the various methods for four common standards: ISO is the most rigorous in terms of defining test methods, and says which alloys should use which test methods as follows:. The effect of post weld surface treatments on the corrosion resistance of super duplex stainless steel welds in sea water SEP method 3 is a special environment only suitable for the Ni-Mo alloys, as described below, in section 4.
Test Samples Samples may be 351-2 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.
Make an Enquiry Notice: Determination of resistance to intergranular corrosion of stainless steels.
Intergranular Corrosion Tests for CRAs
This means that carbide formation during welding is highly unlikely, and modern CRAs should easily pass one of these tests. Why were these tests designed? Your basket is empty. Methods B and E are suggested for all grades of series austenitic alloys, while method F is suggested for cast type alloys.
These tests were introduced when the carbon content in CRAs typically hit 0. Ferritic, austenitic and ferritic-austenitic duplex stainless isso. Where a bend test is required, the sample must be bent over a mandrel of a diameter related to the specimen diameter, without any cracking, as determined isi inspection under a low power microscope and a microsection in any suspicious areas.
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.