CTX-909

UNS #N19909

CTX-909 is a high-strength, precipitation hardenable superalloy which exhibits a low and relatively constant coefficient of thermal expansion over a broad temperature range, high hot hardness and good thermal fatigue resistance. It offers a significant improvement over alloys CTX-1 and CTX-3 due to its excellent combination of tensile properties and stress rupture strength to 1200°F (649°C) in the recrystallized condition combined with the use of common age hardening treatments. CTX-909 alloy is weldable, brazable, and can be chromium plated, but requires a protective coating if exposed to atmospheric conditions above 1000°F (538°C).

Type Analysis

  • Carbon (Maximum) 0.06
  • Phosphorus (Maximum) 0.015
  • Silicon (Maximum) 0.4
  • Nickel (Nominal) 38
  • Titanium (Nominal) 1.6
  • Manganese (Maximum) 0.5
  • Sulfur (Maximum) 0.015
  • Chromium (Nominal) 0.5
  • Cobalt (Nominal) 14
  • Iron (Nominal) Balance
  • Aluminum (Nominal) 0.15
  • Copper (Nominal) 0.5
  • Columbium + Tantalum4.9
  • Boron (Nominal) 0.012

Applications

Compressor and exhaust casings, seals and other gas turbine engine components, Ordnance hardware, Gauge blocks, Rocket engine thrust chambers, Steam turbine blades, Springs, Die-casting dies

Applicable Specifications

  • AMS 5884
  • AMS 5893

Billet

Flats

Rounds

Shapes

Strip

Wire

RELATED RESOURCES

Browse our growing library of resources including case studies, product brochures, technical data sheets, product selection guides and more.