Niobium Hafnium Titanium Zirconium Alloy

Sheets, Plates, Rods, Bars, Billets, Wire, Machined Parts


This unique blend of metals creates a high strength, lightweight material well suited for the extremely high temperatures seen by rocket nozzles and the low temperatures of space. Additionally, this alloy has excellent formability, machinability and is easily weldable using Tungsten Inert Gas (TIG) welding methods.

First developed in 1965, C-103 was initially used on the rocket nozzles of the Apollo Lunar Command Module. Today, Admat’s niobium hafnium alloy utilizes the latest technology in alloy production and is designed for customers who require exceptional quality materials for use in their aerospace and space exploration products. However, unlike the competition, Admat also caters to single prototype quantities and small production volumes. We are very focused on providing exceptional value to any size project.

C-103 is produced by alloying Niobium, Hafnium, Titanium and Zirconium together using a vacuum furnace to create very uniform ingots and then processing them accordingly into forms such as sheets, plates, rods, bars, billets, and custom manufactured parts.
Contact Admat today for a quote on your requirements.


  • ASTM B654 Sheet, Plate
  • ASTM B655 Rod, Bar, Wire
  • ASTM B652 Ingots
  • AMS 7852 Sheet, Plate
  • AMS 7857 Rods, Bars

End Uses

  • Rocket Nozzles
  • Rocket Exhaust Systems
  • Scramjet engine components

Available Forms

  • Rod, Bar
  • Sheet, Plate
  • Wire
  • Discs
  • Rings
  • Fabricated Parts

Physical Properties

Melting Point 2350 ± 50°C
Boiling Point N/A
Density About 8.85 g/cm3
Specific Heat 0.082 BTU/°F/lb
Thermal Conductivity 22.0 Btu/hr - ft2 - °F/ft (1600 °F)
Thermal Expansion 3.9 in/in/°F (400 °F)
Monoisotopic Mass 320.801 g/mol