Influence of a treatment of age hardening on the mechanical properties of Inconel 625 in the presence of hydrogen gas

Inconel 625 presents good mechanical properties and has excellent corrosion behaviour with temperatures being able to reach 1000oC. These mechanical properties are obtained by a heat treatment of structural hardening. Utilization of this super alloy for hydrogen gas must be preceded by a study of its embrittlement. The method of rupture of the discs, under hydrogen pressure or helium pressure has to undertake this study at ambient temperature. We show that for this material, obtaining the mechanical characteristics, by the heat treatment of hyper-hardening and by application of structural hardening, the ambient temperature of a catastrophic embrittlement vis-a-vis hydrogen gas