	US 11,898,228 B2
	Alloy
Mark C Hardy, Derby (GB); David Dye, London (GB); Lucy Reynolds, London (GB); Thomas McAuliffe, London (GB); and Ioannis Bantounas, London (GB)
Assigned to ROLLS-ROYCE PLC, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Aug. 16, 2021, as Appl. No. 17/402,699.
Claims priority of application No. 20200100502 (GR), filed on Aug. 20, 2020.
Prior Publication US 2023/0131449 A1, Apr. 27, 2023
Int. Cl. C22C 30/00 (2006.01); C22C 19/05 (2006.01)

CPC C22C 30/00 (2013.01) [C22C 19/056 (2013.01); C22C 19/057 (2013.01)]

21 Claims

1. A nickel-cobalt based superalloy composition consisting of, by weight:

33.5 to 54 percent nickel;

19.5 to 36 percent cobalt;

9.0 to 12.0 percent chromium;

3.9 to 5.5 percent aluminium;

5.39 to 9.5 percent tungsten;

up to 5.5 percent iron;

2 to 3.5 percent molybdenum;

0.6 to 5 percent tantalum;

0.15 to 2.2 percent titanium;

up to 1.75 percent niobium;

up to 0.1 percent hafnium;

0.005 to 0.03 percent carbon;

0.001 to 0.02 percent boron;

0.005 to 0.06 percent zirconium;

up to 0.3 percent silicon;

up to 0.6 percent manganese; and

the balance being impurities.