What is Niobium Metal Powder? Niobium powder is an effective microalloying element used in steelmaking and is highly used in producing superalloys and high-entropy alloys. Niobium Powder is used in alloys, including stainless steel. It improves the strength of the alloys, particularly at low temperatures. Alloys containing niobium are used in jet engines and rockets, beams and girders for buildings and oil rigs, and oil and gas pipelines. This element also has superconducting properties. Brazil is the leading producer of niobium and ferroniobium, an alloy of 60–70% niobium with iron.