Niobium applications include sputtering targets, nuclear reactors, gas pipelines, jet engines, chemical processing equipment, particle accelerators, turbine blades, automotive components, capacitors, superconductors, sensitive magnetic imaging equipment, vacuum furnaces, reactor vessels, heat exchangers, sodium lamps, jewelry, steel additive, and optics. XOT metals stocks a wide variety of sizes in Niobium rod and can supply custom rod sizes with short lead times.
Niobium is less corrosion-resistant than tantalum at high temperature. Niobium is not attacked by nitric acid up to 100 °C, but aggressively attacked by mixture of nitric and hydrofluoric acids. Hot, concentrated hydrochloric, sulfuric, and phosphoric acids attack it, but hot, concentrated nitric acid does not. Niobium is unaffected at room temperature by most acids. It is attacked by alkaline solutions to some extent at all temperatures. Due to its low capture cross section for thermal neutrons, Niobium Rod & Niobium Bar has application in the nuclear industry. Niobium can be electrically heated and anodized to a wide variety of colors that makes it very attractive in the jewelry industry.
General Properties of Niobium Rod & Niobium Bar
Symbol: Nb
Atomic Number: 41
Atomic Weight: 92.9064
Density: 8.57 gm/cc
Melting Point: 2468 oC
Boiling Point: 4742 oC
Thermal Conductivity: 0.537 W/cm/K @ 298.2 K
Electrical Resistivity: 12.5 microhm-cm @ 0 oC
Electronegativity: 1.6 Paulings
Specific Heat: 0.064 Cal/g/K @ 25 oC
Heat of Fusion: 6.5 Cal/gm mole
Specifications of Niobium Rod & Niobium Bar
Material: R04200-Type 1 -Reactor grade unalloyed niobium
R04210-Type 2 -Commercial grade unalloyed niobium
R04251-Type 3—Reactor grade niobium alloy containing 1 % zirconium
R04261-Type 4—Commercial grade niobium alloy containing 1 % zirconium
R40220-Type 5 -RRR grade pure niobium
Size: 5x5mm to 120mm x 120mm x L<1400mm Wider bars will be named niobium plate and block.
Standard: As per ASTM B392
Purity: >=99.9%
Standard size: Diameter 4~100 mm
We are also able to customize this product according to various specifications.
Niobium round bar is manufactured as random length pieces or cut to customers’ desired lengths in diameters ranging from 0.125 inches to 5.00 inches.
Below are most of the standard sizes of our niobium rectangular bars. If you do not see the required niobium bar size, please feel free to contact us.
| Width | Thickness | Length |
|---|---|---|
| 15mm | 15mm | 600mm |
| 20mm | 20mm | 1000mm |
| 45mm | 45mm | 1200mm |
| 60mm | 60mm | 1500mm |
Chemical Composition of Niobium Bar
| Niobium Chemical Requirements | ||||
|---|---|---|---|---|
| Content, Max, Weight % | ||||
| Element | Grand: R04200 | Grand:R04210 | Grand:R04251 | Grand:R04261 |
| Unalloyed Niobium | Unalloyed Niobium | (Reactor grade niobium-1% Zirconium) | (Commercial grade niobium-1% Zirconium) | |
| C | 0.01 | 0.01 | 0.01 | 0.01 |
| O | 0.015 | 0.025 | 0.015 | 0.025 |
| N | 0.01 | 0.01 | 0.01 | 0.01 |
| H | 0.0015 | 0.0015 | 0.0015 | 0.0015 |
| Fe | 0.005 | 0.01 | 0.005 | 0.01 |
| Mo | 0.01 | 0.02 | 0.01 | 0.05 |
| Ta | 0.1 | 0.3 | 0.1 | 0.5 |
| Ni | 0.005 | 0.005 | 0.005 | 0.005 |
| Si | 0.005 | 0.005 | 0.005 | 0.005 |
| Ti | 0.02 | 0.03 | 0.02 | 0.03 |
| W | 0.03 | 0.05 | 0.03 | 0.05 |
| Zr | 0.02 | 0.02 | 0.8~1.2 | 0.8~1.2 |
| Nb | Remainder | Remainder | Remainder | Remainder |
Applications
- Electronic industry chemistry, electronics, pharmacy industry.
- For steel, ceramics, electronics, nuclear energy industries, and superconductor technology;
- For superconductors, melted cast ingots, and alloying agents.
- Widely used in manufacturing various kinds of alloy steel, high-temperature alloy, optical glass, cutting tool, electronics and superconducting materials and other industries.