ASTM B654 Niobium-Hafnium Alloy Foil, Sheet, Strip, and Plate
- Type: Foil, sheet, strip, and plate.
- Niobium-Hafnium Alloy
- Grade: UNS R04295, 89Nb-10Hf-Ti, C-103
Features
ASTM B654/B654M C-103 Niobium-Hafnium Alloy Foil, Sheet, Strip, and Plate
Chemical Composition (wt.%) for UNS R04295/89Nb-10Hf-Ti/C-103 Niobium-Hafnium refractory alloy sheet, plate and strip
UNS No. | C, max | O, max | N, max | H, max | Hf, max | Ti, max | Zr, max | W, max | Ta, max | Nb, max |
UNS R04295 | 0.015 | 0.025 | 0.01 | 0.0015 | 9月11日 | 0.7-1.3 | 0.7 | 0.5 | 0.5 | Balance |
Additional Chemical Requirements (wt.%) for Finished Products of UNS R04295/89Nb-10Hf-Ti/C-103 Niobium-Hafnium refractory alloy sheet, plate and strip
UNS No. | C, max | O, max | N, max | H, max |
UNS R04295 | 0.015 | 0.025 | 0.01 | 0.0015 |
Mechanical Properties for UNS R04295/89Nb-10Hf-Ti/C-103 Niobium-Hafnium refractory alloy sheet, plate and strip, Annealed Condition (90 % Minimum Recrystallized)
Conditions | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
Material 0.05 in. [1.3 mm] and thinner:
Room temperature 2000 ± 25°F [1100 ± 15°C] |
385 | 275 | 20 |
145 | 110 | 20 | |
Material greater than 0.05 in. [1.3 mm] in thickness:
Room temperature 2000 ± 25°F [1100 ± 15°C] |
370 | 260 | 20 |
145 | 110 | 20 |
Technical Specifications
Specification | Value |
Standard | ASTM B654 C-103 Niobium-Hafnium Alloy Foil, Sheet, Strip, and Plate |
Grade | UNS R04295, C-103, 89Nb-10Hf-Ti |
Condition & Finish | Annealed condition; clean, bright finish, free of defects and surface imperfections. |
Type | Foil, Plate, Sheet, Strip |
Dimension | Foil Width:≤150mm x Thickness:≤0.13mm Plate Width:≥150mm x Thickness:≥4.8mm Sheet Width:≥150mm x Thickness: 0.13-4.8mm Strip Width:≤150mm x Thickness:0.13-4.8mm |
Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
Test | Flatness %=(H/L) x 100, Chemical analysis, Tensile test, Hardness test, and Microstructural examination |
Key Features
High Melting Point: C-103 boasts a very high melting point, exceeding 2400°C (4350°F), making it suitable for extreme temperature environments.
Strength at Elevated Temperatures: Maintains excellent strength and creep resistance even at high temperatures, making it ideal for structural components in demanding applications.
Corrosion Resistance: Exhibits good resistance to oxidation and corrosion, further enhancing its suitability for harsh environments.
Low Neutron Capture Cross-Section: C-103 has a relatively low neutron capture cross-section, making it attractive for nuclear applications where neutron transparency is desired.
Packing
Packed in plywood boxes.
Application
Rocket Nozzles and Thrusters: Niobium-hafnium alloys are used in critical components of rocket engines and thrusters due to their exceptional high-temperature strength and resistance to extreme thermal environments.
Hypersonic Vehicles: They find application in structural components and leading edges of hypersonic vehicles that experience extreme temperatures and aerodynamic forces.
Nuclear Reactor Components: Certain niobium-hafnium alloys are used for specialized components in nuclear reactors, such as fuel cladding and control rods, due to their high-temperature resistance and low neutron absorption.
Heating Elements and Structural Components: These alloys are employed in high-temperature furnaces and equipment for applications requiring exceptional temperature resistance and strength.
Materials Science and Engineering: Niobium-hafnium alloys are studied and used in materials science and engineering research due to their unique properties and potential for pushing the boundaries of material performance.
Rocket engine nozzle extensions: Niobium-hafnium alloys are used for nozzle extensions in rocket engines due to their ability to withstand the extreme heat and erosive forces of rocket exhaust.
Hypersonic vehicle leading edges: These alloys protect the leading edges of hypersonic vehicles from the intense heat generated during hypersonic flight.
Nuclear reactor control rods: Niobium-hafnium alloys with high hafnium content are used for control rods in nuclear reactors due to their ability to absorb neutrons and control the nuclear fission process.