Ferroniob

Ferro niobium (FeNb65, ASTM A550 reference) is the standard carrier alloy for introducing niobium into liquid steel. Once dissolved, Nb forms fine niobium carbonitrides (Nb(C,N)) that pin austenite grain boundaries during hot rolling, restricting recrystallization and delivering grain refinement plus precipitation strengthening. The result is a measurable rise in yield strength, toughness and weldability at additions an order of magnitude lower than conventional alloying. This makes FeNb a primary micro-alloying addition for HSLA structural grades, API line-pipe steels (X60-X80) and lightweight automotive sheet, and for stabilizing stainless grades against intergranular corrosion. Typical additions fall in the 0.01-0.10 wt% Nb range, so a single charge treats large heats economically. Specification: Nb 63-68%, with C ≤0.15%, P ≤0.15%, S ≤0.05%, Si and Al ≤2.0% each, Ta ≤0.50%, sized 10-50 mm for controlled dissolution and minimal fade. Every lot ships with COA and MTC. Multi-regional sourcing supports CIF Marmara delivery and Gebze bonded stock, 20 MT FCL or smaller LCL lots. Send your grade and tonnage for a FeNb RFQ.

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