Refractory Metals
Niobium-hafnium-titanium (Niobium C-103)
Niobium C-103 is a Niobium-Hafnium-Titanium alloy with 10% hafnium and 1% titanium, which has the best combination of formability and high-temperature properties.
Niobium C-103 is mainly used for rocket engine nozzle, space power systems (molten sodium and sodium-potassium alloy pressure tubes and turbine pumps), liquid metal heat exchangers and high temperature structural components in jet engines. It satisfies most rocket engine applications for temperatures up to 1482°C because of its superior mechanical properties, weight savings, and the improved welding and coating properties (due to the hafnium additive).
Chemical requirements for Niobium C-103 (wt%, max.)
UNS
C
O
N
H
Hf
Ti
Zr
W
Ta
Nb
R04295
0.015
0.025
0.01
0.0015
9-11
0.7-1.3
0.7
0.5
0.5
Bal.
Mechanical properties for Niobium C-103
|
Grade
|
Condition
|
Tensile strength |
Yield strength |
Elongation in 1 inch |
|
R04295
|
Room temperature |
385 |
275 |
20 |
|
1100±15°C |
145 |
110 |
30 |
Available forms
Ingot
Plate and sheet
Rod
Wire
Custom-made parts
Specifications
ASTM B652-10
ASTM B654-10
ASTM B655-10
Typical application
Aerospace rocket engine design
