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1.1 ,These test methods cover the chemical analysis of ferroniobium having chemical compositions within the following limits:
| , | Element | Composition, ,% |
| , | Aluminum | 2.00 max |
| , | Carbon | 0.30 max |
| , | Chromium | 2.00 max |
| , | Cobalt | 0.25 max |
| , | Lead | 0.01 max |
| , | Manganese | 3.00 max |
| , | Niobium | 40.00 to 75.00 |
| , | Phosphorus | 0.05 max |
| , | Silicon | 4.00 max |
| , | Sulfur | 0.03 max |
| , | Tantalum | 7.00 max |
| , | Tin | 0.15 max |
| , | Titanium | 5.00 max |
| , | Tungsten | 0.50 max |