Chemical composition of High-purity Nb Ingots
| Grade Level | Remarks | |
| High-purityNbIngots |
3N5(99.95%), 4N(99.99%) |
Total concentration of all impurities should be no more than 500ppm Total concentration of all impurities should be no more than 100ppm |
| High-purityNbfor Superconducting | RRR300 | C,N,O≤10ppm,H≤2ppm |
|
Chemical Element (weight %, max.) |
||||||||||||||
|
UNS |
Type |
C |
O |
N |
H |
Ta |
Fe |
Ti |
W |
Mo |
Si |
Ni |
Zr |
Nb |
|
R04210 |
Pure |
0.004 |
0.015 |
0.003 |
0.0015 |
0.05 |
0.004 |
0.002 |
0.005 |
0.005 |
0.004 |
0.002 |
/ |
Bal. |
|
R04261 |
Nb-Zr |
0.004 |
0.015 |
0.003 |
0.0015 |
0.05 |
0.004 |
0.002 |
0.005 |
0.005 |
0.004 |
0.002 |
1.00 |
Bal. |
|
/ |
Nb-Zr |
0.004 |
0.015 |
0.003 |
0.0015 |
0.05 |
0.004 |
0.002 |
0.005 |
0.005 |
0.004 |
0.002 |
10.0 |
Bal.
|
Application
Niobium is an important rare metal with high melting point, good plasticity, low vapor pressure, high chemical stability, resistance to liquid metal, acid corrosion ability, dielectric surface oxide film, small avid capture cross section, ultra-guide transition temperature, good low-temperature ductility and thermal conductivity and a series of excellent features. Niobium has been widely used in metallurgical, chemical, aerospace, nuclear, electronics, superconducting other fields.
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