CTX-1 is a high-strength, precipitation-hardenable superalloy with high hot hardness and good thermal fatigue resistance, exhibiting a low coefficient of thermal expansion with high strength at temperatures up to 1200°F (649°C), requiring a protective coating if exposed to atmospheric conditions above 1000°F (538°C). It develops its stress rupture ductility through retained hot-cold work, resulting in directionality of properties.
Although it continues to provide the highest strength levels of the controlled expansion high temperature alloys, later generation alloys, such as CTX-3, should be considered for applications involving elevated temperature transverse stress conditions and Thermo-Span® alloy should be considered if moderate oxidation resistance is desired.
