Niobium Wire


Specifications for Niobium Wire

Material: R04200-Type 1 -Reactor grade unalloyed niobium
R04210-Type 2 -Commercial grade unalloyed niobium
Diameter: 0.2~3.0mm
Specification: As per ASTM B392-98
Purity: Nb≥99.9%
Package: <1.5mm on spool, >1.5mm in coil
Shape: Wire in coil, on spool and straight wire


Niobium, is a chemical element with symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal. It has physical and chemical properties similar to the element tantalum, and the two are therefore difficult to distinguish.

Nb is used in various superconducting materials. These superconducting alloys, also containing titanium and tin, are widely used in the superconducting magnets of MRI scanners. Other applications of Nb include welding, nuclear industries, electronics, optics, numismatics, and jewelry. In the last two applications, the low toxicity and iridescence produced by anodization are highly desired properties.

We provide Nb metal, Nb alloys, superconducting materials, Nb compounds and ect.

Chemical composition for our niobium

Composition (%)
Grade Main Content Impurities (≤ %)
Nb Fe Si Ni W Mo Ti Ta O C H N
R04200 Bal .004 .004 .002 .005 .005 .002 .05 .012 0.0035 .0012 .003
R04210 Bal 0.01 .01 .005 .02 .01 .004 .07 .015 .0050 .0015 .008

Mechanical requirements (annealed condition) for our niobium wire

Grade Tensile strength,δb psi (MPa), ≥ Yield strength,δ0.2,  psi (MPa), ≥ Elongation in 1″/2″ gage length, %, ≥
R04200-1 R04210-2 18000 (125) 10500 (73) 25
Special requirements of Nb wire to be agreed on negotiations

Machined & customized Niobium parts are also available. Contact us at for any inquiries and questions on niobium and its alloys products.

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