P460N Welded steel has several applications in the naval environments. The weld regions of this steel frequently need repeated repairs. In this research, the influence of repair welding on microstructure, mechanical and corrosion properties of P460N steel was studied. For this purpose, four samples (without repair, one repair, twice repair and three times repair), were welded. Temper bead welding repair procedure was performed. The quality of all welded samples was assessed using radiography technique. Microstructures of the base metal, heat affected zone (HAZ) and weld metal were examined by optical microscopy and scanning electron microscopy. To evaluate mechanical properties; tension, impact, bending and Vickers hardness tests were performed. Evaluation of corrosion resistance was performed using Tafel polarization test. Aqueous 3.5 wt. % sodium chloride solution was selected as the corrosive environment. The results indicated that corrosion current of the heat affected zone decreased with increasing the number of repairs. Corrosion rate of the base metal was higher than that of weld and HAZ for different number of weld repairs. The hardness values of the heat affected zone near the base metal showed significant increase in one-time repair compared with the no repair specimen; in the two and three times repair, the Vickers hardness number decreased by increasing the number of weld repairs. The hardness of the heat affected zone near the weld metal increased with increasing the number of repairs. Tension, impact and bending tests passed the acceptance criteria of ASME IX. The impact energy of the heat affected zone showed an increased after one repair and then a decrease after the subsequent repairs. Ultimate tensile strength of on repair specimens was more than the others. Keyword: weld repair, P460N Steel, Temper bead, Corrosion, Heat affected zone