H.C. Starck’s niobium C-103 alloy with niobium-hafnium-titanium (Nb-10Hf-1Ti) meets demanding applications that require high strength materials to handle extreme temperatures. Our niobium alloy, performs at temperatures up to 2700°F (1482°C), particularly in high performance rocket nozzle applications for space exploration. The niobium alloy resists high frequency vibrations at cryogenic temperatures, which occurs in many satellite applications.



  • Orbital rocket chambers and nozzles
  • Reaction control nozzles for missiles 
    • Rockets
    • Satellites
  • Jet engine afterburner liners
  • Burst disks for wind tunnels


  • Capable of withstanding high stresses at elevated temperatures
  • Low ductile-to-brittle transition temperature for cryogenic applications
  • Formable after TIG welding
  • Excellent fabricability
  • Readily weldable

Available Forms

H.C. Starck collaborates with customers to fabricate and machine components for aerospace, including build-to-print and design of niobium C103 alloy components.

  • Bar and rod
  • Sheet and plate
  • Ingot and slab
  • Powder for Additive Manufacturing
  • Fabricated parts

H.C. Starck’s C-103 niobium alloy meets ASTM B652, B653, B654, AMS7852 and AMS7857 specifications.