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ISO 9591:2004 specifies a method for the determination of resistance to stress corrosion cracking (SCC) of aluminium alloys.

It covers the method of sampling, the types of specimens, the loading procedure, the type of environment and the interpretation of results.

This International Standard is aimed at determining resistance to SCC as a function of the chemical composition, the method of manufacture and heat treatment of aluminium alloys.

It applies to cast and wrought aluminium alloys in the form of castings, semi-finished products, parts and weldments.

Since most natural and many artificial environments contain chlorides, ISO 9591:2004 can be used to compare the performance of products employed under marine atmospheres and in environments containing chlorides, providing that the failure mechanism is not changed.