Ferroniobium (ferrocolumbium)

01

Choose the grade and impurity limits

The USGS Mineral Commodity Summaries 2025 entry for niobium (columbium) reports that in the United States “Niobium was consumed mostly in the form of ferroniobium by the steel industry and as niobium alloys and metal by the aerospace industry”, with end use estimated at about 77% steels and 21% superalloys. It gives an average unit value for ferroniobium of $21/kg in 2020–21, $25/kg in 2022–23 and $26/kg in 2024 (estimated). [1]

The US tariff lines quoted by USGS split ferroniobium into product with less than 0.02% phosphorus or sulfur, or less than 0.4% silicon (7202.93.4000), and other ferroniobium (7202.93.8000), both at 5% ad valorem. [1] CBMM lists vacuum-grade ferroniobium and nickel-niobium alloys for sensitive applications, as lump packed in drums or big bags, alongside its standard ferroniobium line, and offers customised alloys and specifications. [3] [2]

Editorial note: state the niobium range and maximum phosphorus, sulfur, silicon, aluminium and other residuals on the order, and whether vacuum grade is required; the tariff split above means the certificate values also matter for customs. [1] [3]

Give the supplier the grade (standard or vacuum), niobium range, maximum P, S, Si, Al, Ta and other residuals, form (lump, sized, powder), size range and fines limit, packaging (can, drum, big bag), lot size, sampling and assay method, certificate, REACH and SDS needs, delivery terms and annual quantity.

02

Set form, size and packaging

CBMM's ready-to-order ferroniobium line lists lump at 0–50 mm packed in cans of up to 10 kg, 250 kg drums or 1,000 kg big bags; powder at 45–250 µm in 250 kg drums; and a sized form of 25 × 15 × 60 mm in 200 kg drums or 500 kg big bags. It says it also customises alloys, specifications, weights, packaging and sizes on request, and lists ISO 9001, AS9100 and ISO/IEC 17025 (niobium assay laboratory) certifications. [2]

USGS reports US imports of niobium of 7,170 to 10,100 t (niobium content) a year in 2020–24, with ferroniobium making up 71% of niobium material imports, and ferroniobium and niobium metal imports coming from Brazil (66%), Canada (29%) and others in 2020–23; net import reliance was 100%. [1]

Editorial calculation: at the 2024 average unit value of $26/kg, a 250 kg drum of ferroniobium represents about $6,500 and a 1,000 kg big bag about $26,000 before freight and duty. [1] [2]

03

Assay certificate, size analysis and packaging to ask any ferroniobium supplier for

Ask any supplier for the assay certificate with niobium and impurity values, the size analysis and the packaging available. [2] [1]

04

Agree lot make-up and size grading before ordering

The Bureau of Indian Standards specification IS 3014:1993, drafted with reference to ISO 5453:1980 and ASTM A550-78, limits the niobium content of all its grades to 55–70% and covers seven grades in its Table 1, one designated FeNb65. It recognises three ways of making up a consignment: a tapped lot from one melt or one part of a continuous tap; a graded lot of more than one melt of one designation, whose niobium contents must not differ from each other by more than 3 percentage points; and a blended lot of melts of one designation crushed below 50 mm and mixed. [4]

Its Table 2 sets four size designations, from 15–50 mm down to up to 2 mm, with oversize limited to 10% for each and undersize to 5% for the three coarser sizes, the undersize being valid at the point of delivery. It says material from an out-of-specification cast must not be blended with another cast, and that closer niobium ranges or other element limits are agreed between purchaser and manufacturer. Column headings were read from the scanned IS 3014 table; confirm against the official copy. [4]

Editorial note: CBMM lists its lump at 0–50 mm, wider than any single IS 3014 size designation; state the size designation, the under- and oversize tolerances and the lot method on the order. [2] [4]

05

Niobium content, P, S and Si, vacuum grade, form and size, packaging and assay

Phosphorus, sulfur and silicon do double duty: they set the melt chemistry and, at 0.02% P or S and 0.4% Si, the US tariff line the certificate will be read against. [1]

06

Niobium, carbon, silicon, phosphorus and sulfur, particle size and packaging for a ferroniobium order

Write the size range against a designation: CBMM's 0–50 mm lump is wider than any single IS 3014 size class, which run from 15–50 mm down to under 2 mm with stated oversize and undersize limits. [2] [4]

07

Send the grade, form and paperwork data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Grade: [standard; vacuum]
Chemistry: [Nb range; max P, S, Si, Al]
Form/size: [lump 0–50 mm; powder; sized]
Packaging: [can; drum; big bag]
Lot/sampling: [t; assay method]
Paperwork: [certificate; REACH; SDS; HTS line]
Quantity: [t per year]

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