Properties of inconel
There are several Inconels , the basic one is 600. Because the Inco and Huntington divisions are now gone or acquired ,it would be difficult to get literature . But they produced copious amounts , you may be able to find some ; I have about a 6&quot; stack of brochures I have been too lazy to discard. American Society for Metals Handbooks should be easy to find ( there are several issues). ASM is a common and comprehensive source. What do you mean &quot;Flare&quot; ?

The 600 Inconels do not age harden; The 700 Inconels do age harden. All have good strength and oxidation resistance at high temperatures . Some useful above 2000 F. If you are talking about a rocket ,I guess you do not need blade and vane alloys ( for turbines). 800 and 900 are Incoloys  ; 400 and 500 are Monels
Addenda
Looking at SpaceX info they are using something like Inconel 750 ( formerly X , and X750 ), so it is age hardened for strength due to pressure in the engine. Supposedly they have a modification named SX 500 . Apparently by &quot;flare&quot; they means rapid oxidation because of the oxygen in the engine , but they do not explain.