Niobium Tube


We provide niobium seamless tube, welded tube & pipe, and Nb capillary tube. Other niobium tubular products such as niobium rings are also available on request.

Niobium metal tube and pipe

Nb tubes

Nb tubes

Material Grade: R04200, R04210
Purity: 99.9% Niobium

Item Specification
OD Φ6.0-100mm
WT 0.2-5.0mm
Length 200mm-8000mm


Niobium Capillary

Niobium Capillary

Niobium Capillary

Purity: 99.9% Nb

Item Specification
Outer diameter: Φ0.2~Φ6mm
Wall thickness: T0.015~0.5mm
Tolerance: Outer diameter: Φ±0.003mm
Wall thickness T±0.005mm
Length: L±0.05mm

Chemical Composition for Niobium

Material Main Content Impurities (no more than %)
Nb Fe Si Ni W Mo Ti Ta O C H N
R04200 Bal 0.004 .004 .002 .005 .005 .002 0.05 .012 .0035 .0012 .003
R04210 Bal 0.01 .01 .005 .02 .01 .004 0.07 .015 .0050 .0015 .005

Application for Nb tube

Niobium is a rare, soft, malleable, ductile, gray-white metal. It has a body-centered cubic crystalline structure and in its physical and chemical properties, it resembles tantalum. It must be placed in a protective atmosphere when processed at even moderate temperatures because it tends to react with oxygen, carbon, halogens, nitrogen, and sulfur. The metal is inert to acids, even to aqua regia at room temperatures, but is attacked by hot, concentrated acids, and especially by alkalis and oxidizing agents.
Nb capillary tube and Nb-Zr capillary tubes are often used in high-pressure sodium lamp production.

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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