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Ferroniobium
To GOST 16773-85
The addition of niobium to stainless and high-temperature steels leads to
improved ductility and corrosion resistance, increased strength and
improved weldability of steel. Niobium is required to make steels and alloys
used at high temperatures.
Chemical composition
| Grade |
Chemical composition, % |
| Nb+Ta |
Ta |
Si |
Al |
Ti |
C |
S |
P |
| in limits |
max |
| ÔÍá60 |
55-65 |
1,0 |
1,5 |
3,0 |
1,0 |
0,1 |
0,03 |
0,10 |
| ÔÍá58(ô) |
50-65 |
- |
2,0 |
6,0 |
2,0 |
0,3 |
0,05 |
0,40 |
| ÔÍá58 |
50-65 |
1,0 |
2,0 |
6,0 |
1,0 |
0,2 |
0,03 |
0,15 |
| ÔÍá55ñ |
50-65 |
- |
15 |
4,0 |
8,0 |
0,2 |
0,03 |
0,30 |
| ÔÍá60ñ |
40-65 |
- |
20 |
6,0 |
- |
0,5 |
0,05 |
0,50 |
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Typical composition
| Grade |
Typical composition, % |
| Nb+Ta |
Ta |
Si |
Al |
Ti |
C |
S |
P |
| ÔÍá60 |
62,6 |
0,15 |
0,57 |
2,08 |
0,6 |
0,09 |
0,005 |
0,037 |
| ÔÍá58(ô) |
59,3 |
0,34 |
0,7 |
2,82 |
0,5 |
0,14 |
0,008 |
0,94 |
| ÔÍá58 |
62,9 |
0,15 |
0,58 |
1,0 |
0,53 |
0,15 |
0,009 |
0,035 |
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At request ferroniobium of grade ÔÍá60 with aluminium contents
of not more than 2% and of grade ÔÍá58 with phosphorous contents
of not more than 0.10% can be supplied and non-ferrous metal
impurities can be determined.
Supplied in lumps of 2-100 mm, packed in steel drums.
Density 6,75-8,5 g/cm3.
melting point 1520-1600 °C.
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