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| Products - Niobium |
ASTM B392, B393, B394: Additional Chemical Requirements
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ASTM B392, B393, B394:
Additional Chemical Requirements for Finshed Nb and Nb Alloy Nb1Zr Products
(When Specified by Purchaser)
Maximum, ppm |
| Element |
Type 1
Reactor Grade
Unalloyed Niobium
R04200 |
Type 2
Commercial Grade
Unalloyed Niobium
R04210 |
Type 3
Reactor Grade
Niobium 1% Zirconium
R04251 |
Type 4
Commercial Grade
Niobium 1% Zirconium
R04261 |
| Oxygen |
250 |
400 |
250 |
400 |
| Carbon |
100 |
150 |
100 |
150 |
| Nitrogen |
100 |
100 |
100 |
100 |
| Hydrogen |
15 |
15 |
15 |
15 |
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