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Sensitization occurs when a material is exposed to a specific range of temperatures for a time sufficient for carbides to form. In the case of austenitic stainless steels, they can commonly become sensitized between 900°F – 1500°F.

ASTM A262 method E is sometimes called the Strauss test, and is the same as ISO 3651-2 method A, except for the duration. 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.

Susceptibility to Inter granular Corrosion (IGC ) of austenitic stainless steel can be determined by ASTM A262, ISO3651-2 and IS10461 (Part 1 & 2 ) . ASTM A262 describes four different methods of IGC practices such as Practice A, B, C & E.

ASTM A262 is a common intergranular corrosion testing method that can quickly screen batches of material to determine corrosion susceptibility. The ASTM A262 testing specification contains five unique intergranular corrosion tests.

ISO 3651-2:1998(en) Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid.

ASTM A262 method E is sometimes called the Strauss test, and is the same as ISO 3651-2 method A, except for the duration. 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.