Design and mechanical characterization of a Zr-Nb-O-P alloy

► In commercial Zr-Nb alloys, Sn was removed for improved corrosion resistance at the expense of strength. ► The addition of sulphur was found to enhance the mechanical strength and corrosion resistance. ► Phosphorous and sulphur have the similar electronic structure, atomic radius and electronegativity. ► The strength was enhanced by increasing Nb (to 1.5%) and oxygen (to 1600 ppm) and adding phosphorous. ► Zr-1.5Nb-O-P alloys were found to have excellent mechanical properties.