... is useful for high-temperature springs and bolts. Alloy X-750 is used in gas turbines, rocket engines, nuclear reactors, ... pressure vessels, tooling, and aircraft structures.PropertiesNon-magnetic. Alloy X-750 has good elevated temperature strength properties to 1300ºF (700 ... the age hardening heat treatment. Like similar alloys, Alloy X-750 requires a rigid set-up with plenty of power, preferably ...