Passive metals might undergo pitting corrosion during sevice in chloride-containing environments at elevated temperatures. The present paper introduces the concept of the pitting susceptibility factor (PSF) and discusses the benefits and limits of using the PSF for predicting environmentally assisted cracking (EAC) susceptibility of passive metals in simulated oil and gas environments at elevated temperatures. Key electrochemical parameters of several passive metals including stainless steels and Nickel alloys were determined using open-circuit potential and cyclic potentiodynamic polarization measurements. Based on these electrochemical parameters, the PSF was calculated for characterizing pitting susceptibility. The obtained PSF-values were compared to the EAC behavior of these materials determined by slow strain rate, constant load and rotating bending fatigue tests in brines at different temperatures to establish their prediction ability for EAC susceptibility.