Minor Metals in the Periodic Table
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41
Nb
92.9064
Nb - Niobium (Columbium) (Niobium (Melting Grade))
Origin
In Seller’s option.
Tariff No.
8112 9231 unwrought
8112 9221 scrap
Quality
| Nb (or Cb) | 99.5 | % min. |
| O2 | 0.05 | % max. |
| All other elements each | 0.05 | % max. |
No other elements specified.
Form
Homogeneous lots of any of the following: whole electron beam melted bars or bar ends, cut bars, cut sheets, cut tubes.
Packaging
In uniform sealed steel drums with inner plastic liners, on pallets, 200 KG net each or whole bars strapped on pallets.
Lot Size & Tolerance
200 KG (+/- 2%)
Documentation
Standard documentation, as per MMTA Consolidated Regulations.
Weighing & Sampling
As per MMTA Consolidated Regulations.
Other Notes
Niobium and columbium are names for the same chemical element with atomic number 41. Columbium (Cb) was the name given in 1801, and niobium (Nb) was the name officially designated by the International Union of Pure and Applied Chemistry in 1950. Niobium is still sometimes referred to as columbium in the Americas.
Niobium (Columbium) Metal Norms
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Economics and Facts
- USGS (various)
- Hard Assets Investor (2010)
- Metal Bulletin (2007)
- Mining Journal (2005)
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REACH Consortia
Information will soon be available on the consortia for this metal and its compounds.

