Abstract
This paper describes a new aspect on evaluation of hydrogen embrittlement susceptibility and its mechanism of austenitic stainless steels and pure titanium on the basis of the results already reported, which were mainly obtained by using a constant load method under an open circuit condition. In addition, a criterion to judge whether the failure of the materials takes place by stress corrosion cracking (SCC) or hydrogen embrittlement (HE) is also described for the constant load method.