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Ferroniobium GOST 16773-2003
Doping alloy of ferrum and niobium (amount of niobium and tantalum). Ferroniobium is added into the stainless CrNi-steel grade for its intercrystalline corrosion and destruction prevention, as well as in the other steel grades for their properties improvement.
| Grade | Ta+Nb | Ta | Si | Al | Ti | C | S | P |
|---|---|---|---|---|---|---|---|---|
| ФНб60 | 55-65 | 1 | 1,5 | 3 | 1 | 0,1 | 0,03 | 0,1 |
| ФНб58 | 50-65 | 1 | 2 | 6 | 1 | 0,2 | 0,03 | 0,15 |
| ФНб58ф | 50-65 | 2 | 6 | 2 | 0,3 | 0,05 | 0,4 | |
| ФНб55С | 50-65 | 15 | 4 | 8 | 0,2 | 0,03 | 0,3 | |
| ФНб50С | 40-65 | 20 | 6 | 0,5 | 0,05 | 0,5 |
It is used for electrode coatings production, in the steel-making and foundry industry.