A&R Merchants Inc. is a Niobium strip and foil product supplier, offering a wide range of thicknesses and widths. We can offer flat rolled material cut to specific lengths or we can supply coiled sheet or strip shipped on cores. A&R Merchants Inc provides NIOBIUM Metal Strip & Foil.
| Verifiable impurity | Fraction of total mass, %, max. | Verifiable impurity | Fraction of total mass, %, max. |
| Silicon | 0.005 | Tungsten | 0.05 |
| Iron | 0.01 | Molybdenum | 0.02 |
| Nickel | 0.005 | Hafnium | 0.02 |
| Titanium | 0.03 | Carbon | 0.01 |
| Tantalum | 0.3 | Nitrogen | 0.01 |
| Zirconium | 0.02 | Oxygen | 0.025 |
| Hydrogen | 0.0015 |
Niobium contained shall be minimum 99.5%.
