1) British invention 2) Chromium alloy 
Nimonic is a registered trademark of Special Metals Corporation that refers to a family of nickel-based high-temperature low creep superalloys. Nimonic alloys typically consist of more than 50% nickel and 20% chromium with additives such as titanium and aluminium. The main use is in gas turbine components and extremely high performance reciprocati...
of alloys used in high-temperature work
A group of nickel-based alloys used in jet engines.
An alloy consisting of roughly 80% nickel and 20% chromium with additives such as titanium and aluminium. The main use is in gas turbine blades.
Class of nickel-base cast alloy resistant to stress and to oxidation at high temperatures.