Patent ID: 6966956

Claim:
A Ni-based single crystal super alloy having a composition consisting of 5.0-7.0 wt % Al, 4.0-8.0 wt % Ta, 2.9-4.5 wt % Mo, 4.0-8.0 wt % W, 3.0-6.0 wt % Re, 0.01-0.50 wt % Hf, 3.0-5.0 wt % Cr, 0.1-9.5 wt % Co, and 1.0-4.0 wt % Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities; and wherein when the lattice constant of the matrix is taken to be a1 and the lattice constant of the precipitation phase is taken to be a2, a2≦0.999a1.