A nickel-base alloy, an object made thereof and the use thereof

Abstract

The present disclosure relates to a nickel-based alloy. More specifically, the present disclosure relates to a medium to high entropy nickel-based alloy having the following composition, in percent by weight (wt-%): Cr 20.0 to 26.0; Fe less than 8.5; Mn less than 4.0; Si 0.5 to 2.0; Al 1.0 to 4.0; Ti 0.50 to 4.0; C less than 0.05; N less than 0.05; Ta less than 2.0; Nb less than 4.0; Co 3.0 to 6.0; Cu 2.1 to 6.0; Mo less than 2.0; W less than 1.0; optionally B less than 0.005; optionally P less than 0.005; optionally S less than 0.005; optionally Ca, Mg and Ce in a total amount of less than 0.5; Ni balance and incidental impurities; wherein the nickel-based alloy fulfils the following requirements: a) Cu−(0.1*Fe+2.1)≥0.0, wherein the numerical values of the alloying elements are given in weight %; and b) Formula (I), wherein Ci is the mole fraction and R is the gas constant. The nickel-based alloy according to the present disclosure is primarily intended for solution annealed objects adapted to be exposed to atmospheres where metal dusting easily occurs.

Dependencies are inferred from the claim text.