CTX-3

UNS #N19907

CTX-3 is a low-expansion, high-strength, precipitation-hardenable superalloy with high hot hardness, good thermal fatigue resistance, and a low coefficient of thermal expansion over a broad temperature range. It offers a significant improvement in notched stress rupture strength over CTX-1 and is not affected by stress orientation. It is weldable, brazable, and can be chromium plated, but requires a protective coating if exposed to atmospheric conditions above 1000°F (538°C). This material could be considered for use in applications requiring resistance to thermal fatigue in noncorrosive environments.

Type Analysis

  • Carbon (Maximum) 0.05
  • Phosphorus (Maximum) 0.015
  • Silicon (Maximum) 0.5
  • Nickel (Nominal) 37.00 - 39.00
  • Titanium (Nominal) 1.25 - 1.75
  • Manganese (Maximum) 0.5
  • Sulfur (Maximum) 0.015
  • Chromium (Nominal) 0.5
  • Cobalt (Nominal) 13.00 - 15.00
  • Iron (Nominal) Balance
  • Aluminum (Nominal) 0.25
  • Copper (Nominal) 0.5
  • Columbium + Tantalum4.50 - 5.50
  • 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

Billet

Flats

Rounds

Shapes

Wire

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