scope:

Specifies methods for the determination of the resistance to intergfanular corrosion of ferritic, austenitic and ferritic-austenitic (duplex) stainless steels in media containing sulphuric acid. It also specifies the purposes which may be assigned to the test. The test methods included are: METHOD A: the 16 % sulphuric acid/copper sulphate test (Strauss test);METHOD B: the 35 % sulphuric acid/copper sulphate test;METHOD C: the 40 % sulphuric acid/ferric sulphate test (Streicher test). The methods are applicable to stainless steels supplied in the form of cast, rolled or forged products and tubes and intended to be used in a midly oxidizing acid medium (for example, sulphuric acid, phosphoric acid).