Nickel-based superalloy and methods for repairing gas turbine components

A nickel-based superalloy includes, in terms of weight, in terms of weight, about 0.08% to about 0.12% carbon, about 6.0% to about 6.4% aluminum, about 5.8% to about 6.3% tantalum, about 6.5% to about 7.0% chromium, about 9.3% to about 9.8% cobalt, about 1.3% to about 1.7% molybdenum, about 2.4% to about 2.8% rhenium, about 3.8% to about 4.3% tungsten, about 0.9% to about 1.3% hafnium, about 0.01% to about 0.03% zirconium, up to about 0.10% silicon, and nickel. A method for repairing a surface of a turbine component includes the step of applying the nickel-based superalloy to a damaged area of the component surface, and post-deposition processes.