Often referred to as Inconel® Alloy X-750, this high-performance austenitic nickel-chromium alloy is made precipitation-hardenable by the addition of aluminum and titanium. It has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at high temperatures. For extended applications that require high strength at high temperatures, Alloy X-750 may require a solution treatment, with air cooling between intermediate and final aging.
Alloy X-750 displays excellent workability, including machinability and welding. Alloy X-750 has excellent relaxation resistance, good elevated temperature strength properties to 1300ºF (700°C), and oxidation resistance to 1800ºF (983˚C). Lastly, Alloy X-750 is resistant to a wide variety of industrial corrosives under both oxidizing and reducing conditions, while also displaying excellent resistance to chloride stress corrosion cracking in fully age-hardened conditions.
Commercial use of the alloy is governed by industry standards such as: AMS 5698, AMS 5699, NACE MR0175 (ISO 15156‐3), NACE MR0103 (ISO 17945), ASTM B637, MIL‐DTL‐24493.
Aerospace use is supplied via AMS 5678G which further controls the material with additional qualification tests on the final drawn wire’s microstructure.