Niobium Hafnium Alloy (C103)

  • Niobium Hafnium C103 alloy
  • Nb10Hf C-103

Product Details

Niobium C-103 History

In 1965, America successfully developed niobium C-103 alloy and used C-103 in Apollo manned lunar module rocket engine nozzle extended segment. In 1975, China succeeded in developing NbHf10Ti1Zr0.7 niobium alloy.

Niobium C-103 Application

Niobium alloy C-103 is a mainly excellent choice for the manufacture of liquid rocket thruster nozzles, lightweight propulsion systems and rocket engine thrust chamber used in the industry of aerospace. Niobium C-103 is also used in the manufacture of turbopump and high-temperature jet engine parts. It is correct to state that Niobium alloy C-103 is a good material in space engineering fabrication.

Niobium C-103 Fabrication Methods

Niobium alloy C-103 has high melting point. Fabrication methods involves making C-103 ingots and mechanical process. Niobium hafnium alloy basically combines electron-beam cast with vacuum consumable electrode arc furnace to produce ingots. Then C-103 will be extruded or forged over 1200℃. Under 500℃ the alloy goes through rolling and drawing process. Finally Niobium Hafnium alloy C-103 can be manufactured into sheets, strips, rods, wire or other fittings.

Niobium C-103 Welding

Niobium alloy C-103 has good weldability. There are argon tungsten-arc welding and electron-beam fusion welding. Welding quality is related to the purity of argon and vacuum. With purer the argon and lower remaining pressure, the better the welding quality will be.

Niobium C-103 Heat Treatment

Usually vacuum or inert gas protection are applied to the niobium C-103 annealing, solution and aging treatment.

C-103 Chemical Composition Maximum Weight % (Except Where Otherwise Specified)
Products C O N H Hf Ti Zr W Ta
C-103 0.015 0.025 0.01 0.0015 9 - 11 0.7 - 1.3 0.7 0.5 0.500
C-103 Physical Properties
Products Composition Density/g·cm-3 Temperature/˚C Coefficient of Line-expansion/10-6K-1 Recrystallization Temperature/˚C Anneal Temperature/˚C Elongation Brittle Transition Temperature/˚C
C-103 Nb-10Hf-1Ti-0.7Zr-0.1W-0.1Mo-0.05Ta 8.86 2349 4.5 (1203˚C) 1038 - 1316 871 - 196
Niobium Alloys C-103 Foil, Sheet, Strip and Plate Mechanical Property
  Ultimate Tensile Strength, Min, Psi (MPa) Yield Strength(0.2 % offset), Min,Psi (MPa) Elongation In 1 In.(25 mm) Gage Length, Min, %
Material 0.05 in. (1.3 mm) and thinner:
Room temperature 56 000 (385) 40 000 (275) 20
2000 ± 25°F
(1100 ± 15°C)
21 000 (145) 16 000 (110) 20
Material greater than 0.05 in. (1.3 mm) in thickness:
Room temperature 54 000 (370) 38 000 (260) 20
2000 ± 25°F
(1100 ± 15°C)
21 000 (145) 16 000 (110) 20
Niobium Alloys C-103 Rod Bar and Wire Mechanical Property
  Ultimate Tensile Strength, Min, Psi (MPa) Yield Strength(0.2 % offset), Min,Psi (MPa) Elongation In 1 In.(25 mm) Gage Length, Min, %
Material 0.050 in. (1.27 mm) and smaller in diameter:
Room temperature 56 000 (385) 40 000 (275) 20
2000 ± 25°F
(1100 ± 15°C)
21 000 (145) 16 000 (110) 20
Material 0.051 in. (1.30 mm) and larger in diameter:
Room temperature 54 000 (370) 38 000 (260) 20
2000 ± 25°F
(1100 ± 15°C)
21 000 (145) 16 000 (110) 20
C-103 High-temperature Properties
Products Composition Shape Temperature/˚C Tensile Strength/MPa Temperature/˚C Modulus of Elasticity Break Strength/MPa
C-103 10Hf, 1Ti, 0.7Zr Sheet 1093 189.8 - 112 490 -

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