4.1 These test methods for the chemical analysis of ferroniobium alloy are primarily intended to test such materials for compliance with compositional specifications such as Specification A550. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.
1.1 These test methods cover the chemical analysis of ferroniobium having chemical compositions within the following limits:
|
| Element | Composition,8201;% |
|
| 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 |