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Unalloyed niobium majorly includes two grades: Reactor grade unalloyed niobium (R04200) and Commercial grade unalloyed niobium (R04210).
Chemical requirements for unalloyed pure niobium (wt%, max.)
|
UNS |
C |
N |
O |
H |
Zr |
Ta |
Fe |
Si |
W |
Ni |
Mo |
Hf |
Ti |
|
R04200 |
0.01 |
0.01 |
0.015 |
0.0015 |
0.02 |
0.1 |
0.005 |
0.005 |
0.03 |
0.005 |
0.01 |
0.02 |
0.02 |
|
R04210 |
0.01 |
0.01 |
0.025 |
0.0015 |
0.02 |
0.3 |
0.005 |
0.005 |
0.05 |
0.005 |
0.02 |
0.02 |
0.03 |
* Per ASTM B393-09
Mechanical properties for unalloyed pure niobium
|
Grade
|
Condition
|
Tensile strength |
Yield strength |
Elongation in 1 inch |
|
R04200 |
Annealed |
125 |
73 |
25 |
|
R04210 |
Annealed |
125 |
73 |
25 |
* Annealed condition - 90 % Minimum Recrystallized
* Per ASTM B393-09
Available forms
● Ingot
● Bar
● Plate and sheet
● Rod and bar
● Wire
● Tube and pipe
● Capillary tube
● Crucible
● Fastener
● Custom-made
Specification
ASTM B393-09
Typical application
Chemical processing
Nuclear plant
Superalloy manufacturing
Special steel manufacturing
Furnace construction
Lighting
Jewelry design
