The stress corrosion cracking( SCC) behavior of PH13-8Mo precipitation hardening stainless steel( PHSS) in neutral NaCl solutions was investigated through slow-strain-rate tensile( SSRT) test at various applied potentials. Fracture morphology,elongation ratio,and percentage reduction of area were measured to evaluate the SCC susceptibility. A critical concentration of 1. 0 mol / L neutral NaCl existed for SCC of PH13-8Mo steel. Significant SCC emerged when the applied potential was more negative than -0. 15 V_(SCE),and the SCC behavior was controlled by an anodic dissolution( AD) process.When the applied potential was lower than -0. 55 V_(SCE),an obvious hydrogen-fracture morphology was observed,which indicated that the SCC behavior was controlled by hydrogen-induced cracking( HIC).Between -0. 15 and -0. 35 V_(SCE),the applied potential exceeded the equilibrium hydrogen evolution potential in neutral NaCl solutions and the crack tips were of electrochemical origin in the anodic region; thus,the SCC process was dominated by the AD mechanism. The stress corrosion cracking (SCC) behavior of PH13-8Mo precipitation hardening stainless steel (PHSS) in neutral NaCl solutions was investigated through slow-strain-rate tensile (SSRT) test at various applied potentials. Fracture morphology, elongation ratio, and percentage reduction Significant SCC took when the applied potential was more negative than -0. 15 V_ (SCE) , and the SCC behavior was controlled by an anodic dissolution (AD) process. Application of the was lower than -0. 55 V SCE, an obvious hydrogen-fracture morphology was observed, which indicates that the SCC behavior was controlled by hydrogen-induced cracking (HIC) .Between -0.15 and -0.35 V SCE, the applied potential exceeded the equilibrium hydrogen evolution potential in neutral NaCl solutions and the crack tips were of electrochemical origin in the anodic region; Thus, the SCC process was dominated by the AD mechanism.