The tests according to standard ASTM A262, Practice B (Streicher), Practice C (Huey) or Practice E (Strauss) are intergranular corrosion tests to check heat treatment of alloys.
The Streicher test (ASTM A262, Practice B) is typically used to detect the susceptibility of materials to intergranular corrosion due to chromium carbide precipitation in unstabilized austenitic stainless steels and due to sigma phase formation.
The Huey test (ASTM A262, Practice C; similar to ISO 3651-1) is predominantly used to detect the susceptibility to intergranular corrosion die to chromium carbide precipitations. The test is also conducted to evaluate the performance of materials in strongly oxidizing environments, like nitric acid.
The Strauss test (ASTM A262, Practice E; similar to ISO 3651-2, Method A, Monnypenny Strauss test) is a qualitative test performed to evaluate the susceptibility to intergranular corrosion.
