Patent ID: 7597843

Claim:
A nickel based superalloy, which consists of chromium in an amount of 3.8 to 6.8% by weight, cobalt in an amount of 10.1 to 12.5% by weight, tungsten in an amount of 4.8 to 7% by weight, rhenium in an amount of 3.3 to 5.2% by weight, tantalum in an amount of 6.1 to 8% by weight, titanium in an amount of 1.2 to 1.8% by weight, aluminum in an amount of 4.5 to 6.5% by weight, ruthenium in an amount of 0.1 to 6% by weight, hafnium in an amount of 0.03 to 0.15% by weight, molybdenum in an amount of less than 0.5% by weight, carbon in an amount of 0.06% by weight or less, boron in an amount of 0.01% by weight or less, zirconium in an amount of 0.01% by weight or less, oxygen in an amount of 0.005% by weight or less, nitrogen in an amount of 0.005% by weight or less and inevitable impurities and the balance being nickel, and wherein said nickel based superalloy is a nickel based single crystal superalloy, and wherein said nickel based single crystal superalloy has excellent mechanical strength, corrosion resistance and oxidation resistance.