Nickel-base alloy for a turbine rotor of a steam turbine and turbine rotor of a steam turbine

A Ni-base for a turbine rotor of a steam turbine includes in wt .-% C, 0.05 to 0.15, Cr: 22 to 28, Co: 10 to 22, Mo: 8 to 12, Al: 0.8 to less than 1.5, Ti: 0.1 to 0.6, B: 0.001 to 0.006, the Re: 0.1 to 2.5, and balance Ni and unavoidable impurities.