High temperature iron-containing gas turbine alloys containing g

Alloys or metallic compositions – Ferrous – Nine percent or more chromium containing

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420444, 4205841, 4205861, C22C 3000, C22C 3854

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active

054494893

ABSTRACT:
Turbine engine alloys modified by the addition of small amounts of gold are found to have improved properties over similar alloys that do not contain Au. These improved alloys have special application in gas turbines and jet engines. Preferred composition ranges are (36 to 45) wt % Ni-(25 to 32) wt % Fe-(16 to 21) wt % Cr-(0.3 to 0.4) wt % Al-(0.3 to 0.4) wt % Ti-(0.6 to 0.8) wt % Mn-(0.3 to 0.4) wt % Cu-(0.02 to 0.05) wt % C-(0.02 to 20) wt % Au and (44 to 56) wt % Fe-(20 to 26) wt % Ni-(12 to 16) wt % Cr-(1 to 1.3) wt % Mo-(1.7 to 2.2) wt % Ti-(0.2 to 0.3) wt % V-(0.15 to 0.21) wt % Al-(0.001 to 0.003) wt % B-(0.15 to 0.21) wt % Mn-(0.3 to 0.7) wt % Si-(0.02 to 0.05) wt % C-(0.02 to 20) wt % Au.

REFERENCES:
patent: 2944891 (1960-07-01), Cape
patent: 3853548 (1974-12-01), Fairbanks et al.
patent: 5374393 (1994-12-01), Gettiffe et al.

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