Inconel

The bolts are made of a superalloy called Inconel, made roughly once a year in only a handful of mills in the U.S.

An alternative approach to ablatives, is to employ a nickel alloy called Inconel which can cope with airflow heated to the same intensity as a lava flow.

The engine chamber was printed using Inconel, a super alloy, which dramatically shortened the timeline for producing the part compared to traditional methods, the company said.

Oh, did I not mention the Inconel skis?

Plus, parts fail: In the 1970s and 1980s, plants endured a rash of steam-filled tubes bursting as a result of a faulty alloy—Inconel 600—used in their construction.