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Products Introduction

Pure niobium seamless pipe is a cutting-edge product in the field of refractory metal pipes, integrating the excellent intrinsic properties of niobium metal with the structural integrity of a seamless manufacturing process. Niobium (Nb, atomic number 41) is a shiny, gray, ductile refractory metal that belongs to the VB group of the periodic table of elements. Its density is 8.57 g/cm³, its melting point is 2477°C, and its boiling point is as high as 4744°C. It is one of the most heat-resistant metal materials in industrial applications.

The pure niobium seamless pipe we provide has a wall thickness of only 0.25 mm, an inner diameter of 5.76 mm, and a length of 1800 mm-these precise dimensions make it particularly suitable for applications with stringent requirements for ultra-thin-walled pipes, while also having an excellent strength-to-weight ratio. The pipe is manufactured through cold rolling or cold drawing processes and complies with GB 8183-87 and GB/T 8183-2007 standards to ensure uniform grain structure, consistent wall thickness, and no weld defects. The product is available in two grades, Nb1 and Nb2, and can be supplied in a cold-rolled state (Y), annealed state (M), or stress-relieved state (m) as needed to meet the requirements of different working conditions.

The core competitiveness of this product lies in the superposition of its multiple excellent properties: excellent corrosion resistance to highly corrosive chemicals, low thermal neutron absorption cross section, superconducting properties at low temperatures, and good biocompatibility. The ultra-thin wall thickness of 0.25 mm maximizes heat transfer efficiency, reduces material usage, and enables precise fit in compact components-properties that are critical for high-performance applications such as superconducting magnets and medical implants.

The pipes are made of high-purity niobium with a purity of ≥99.9% and have strict dimensional tolerances (wall thickness tolerance ±10% and outer diameter tolerance ±0.05mm when the outer diameter is ≤2mm), ensuring highly consistent quality between batches.

Products Parameters

Product Name	Pure Niobium Seamless Pipe
Material	R04200/R04210/Nb1/Nb2
Purity	≥99.9%
Outer Diameter	6.26mm/Customized
Inner Diameter	5.76mm/Customized
Length	1800mm/Customized
Wall thickness	0.25 mm/Customized
Wall thickness Tolerance	±10% of nominal wall thickness
Outer diameter tolerance	±0.05mm when the outer diameter is ≤2mm; ±0.1mm when the outer diameter is 2~5mm
Length tolerance	When the length is >1000mm, +6mm is allowed
Surface Treatment	Polished
MOQ	10PCS
Customized Service	Customizable size, surface treatment
Certificates	ISO9001
Density	8.57 g/cm³
Melting point	2468 ℃
Tensile strength(annealed state)	180～250 MPa
Tensile strength(cold-drawn state)	350～500 MPa
Yield strength	≥85 MPa

Products Applications

This 0.25mm wall thickness pure niobium seamless pipe plays a key role in many high-tech industries due to its unique properties.

Superconducting technology field

Niobium is the most widely used practical superconducting material. The tubing has important applications in superconducting magnets for magnetic resonance imaging (MRI) systems - niobium titanium (NbTi) and niobium tin (Nb₃Sn) superconducting coils generate the powerful magnetic fields needed for medical diagnosis. At the same time, the tube is also used in particle accelerators, superconducting radio frequency (SRF) cavities and superconducting cables. The 5.76mm inner diameter and 0.25mm wall thickness are ideal for fine superconducting wire jacketing and capillary applications.

Chemical industry

The excellent corrosion resistance of pipes makes them very suitable for pipeline systems and reactors that handle strong acids, alkalis and corrosive chemicals. It can be used in chemical reactors, heat exchangers, and high-purity gas delivery systems such as chlorine (Cl₂) and hydrogen bromide (HBr). Seamless construction eliminates leak paths, ensuring safety when handling hazardous materials.

Electronics and Semiconductors

This tube is used for capacitor electrodes, electron tubes, vacuum devices and semiconductor process equipment. Used as a chamber lining in wafer processing equipment to prevent metal contamination. High conductivity and stability make it suitable for demanding electronic applications.

Products Advantages

This pure niobium seamless pipe with a wall thickness of 0.25mm combines a number of technical advantages, making it the material of choice for high-end engineering applications.

Excellent corrosion resistance: Niobium has excellent resistance to a variety of corrosive media, including strong acids, strong bases and corrosive chemicals. Unlike many metals, niobium remains stable in inorganic acids or alkalis and is not susceptible to corrosion even in harsh environments - it is not soluble in aqua regia (but is soluble in hydrofluoric acid). This excellent chemical stability ensures long service life in environments such as chemical, pharmaceutical and semiconductor manufacturing.

Ultra-high temperature performance: With a melting point as high as 2477°C, niobium maintains mechanical integrity at temperatures where most metals would fail. The naturally formed oxide film on the surface provides long-lasting oxidation resistance, making the pipe suitable for use in high-temperature furnace components and extreme thermal environments.

Superconducting properties: Niobium is the metal with the highest critical temperature among elemental superconductors, which, combined with its good processability, makes it a core material for superconducting magnets, particle accelerators and magnetic resonance imaging (MRI) systems. The seamless construction eliminates weld-related defects and potential damage to superconducting properties.

Excellent Mechanical Integrity: As a seamless pipe manufactured by cold rolling or cold drawing, the product does not contain any welds – eliminating possible weak links in welded pipes. The result is a uniform grain structure, consistent mechanical properties throughout the entire length, and better pressure-bearing capacity. Research shows that the overall performance of seamless niobium pipes is better than that of welded pipes.

Precision thin-wall capability: The ultra-thin wall thickness of 0.25mm represents an engineering advancement that maximizes heat transfer efficiency, saves material costs, and supports compact designs. This thin wall is achieved through advanced cold working technology while maintaining dimensional accuracy and material integrity.

Comparison between seamless pipe and welded pipe

01. Manufacturing process

Seamless niobium pipes are directly processed from solid niobium ingots through cold rolling or cold drawing processes, with no welds in the entire process. The process involves perforating the ingot and then reducing it to the final size through multiple passes of rolling or drawing. Welded niobium tubes roll niobium plates or strips into a tube shape and join the edges by welding. The thickness of the tube wall depends on the thickness of the plate.

02. Structural integrity

Seamless pipes have no welds, eliminating possible weak links in welded pipes. Welded pipes have a heat-affected zone (HAZ) near the weld. The microstructure and mechanical properties of this area may be different from those of the base metal, which is manifested by a decrease in strength, a change in corrosion resistance, and easier failure under stress. Seamless pipe has uniform performance throughout its entire length, making it the first choice for high-pressure, high-temperature, and safety-critical applications.

03. Performance

Research shows that the overall performance of seamless niobium pipes is better than that of welded pipes. The seamless structure ensures a uniform grain structure, consistent wall thickness, and no weld-related defects that compromise superconductivity, corrosion resistance, or mechanical strength. For applications where performance is critical, such as superconducting RF cavities, seamless tubes are the first choice.

04. Cost and production efficiency

Due to its simple process and high production efficiency, welded pipes usually have lower manufacturing costs and can produce larger diameter pipes. However, the high reliability of seamless pipes, despite their higher price, brings value in critical applications that far outweigh the cost difference.

05. Surface Quality

Welded niobium tubes generally have better interior surface quality and more uniform wall thickness. However, the presence of welds may affect the consistency of the surface finish. Seamless pipe provides a smooth, uniform surface throughout its entire length with no weld interruptions.

06. Applicable scenarios

Seamless niobium tubes are suitable for aviation engine thermal management systems, nuclear reactor cooling pipes, high-pressure chemical reactors, superconducting magnets, medical implants, and other occasions where failure is not allowed. Welded pipes are used in general chemical pipelines, electronic device enclosures, and non-critical environments where cost is a priority.

Logistics Description

Delivery timeliness: Mass customized orders (> 100 pieces), production cycle 15 to 20 days, delivery immediately after production is completed.

International logistics: support DHL, FedEx, UPS, TNT international express delivery, as well as sea and air freight FCL/LCL; It can provide a full set of export documents, such as customs declaration, inspection declaration, certificate of origin, commercial, etc., suitable for global customers to purchase.

Freight description: The freight for international orders is calculated according to the actual weight, volume, and destination, and the freight quotation can be raised before placing an order.

Packaging standards

Regular packaging

Inner vacuum packaging: Put a single niobium seamless pipe into the package to isolate it from air, moisture, and oxidation, and package it individually to avoid scratches between the niobium pipes.

Mid-layer shockproof packaging: the niobium pipe after packaging is put into a high-density thickened EPE pearl cotton (thickness ≥ 20mm) custom card slot, each piece is fixed separately, cushioning transportation vibration, preventing bumping, deformation, and surface damage.

Outer protective packaging: Wrap in pearl cotton and put it into a thickened box, fill the box with bubble film to fill the gap, and seal the opening of the box with high-strength tape to ensure that the box is not deformed and damaged during transportation.

Custom packaging

Support customers to specify packaging materials (such as moisture-proof cartons and iron boxes), LOGO content (such as customer LOGO, product model), and adapt to special transportation and storage needs; Batch orders can provide customized packaging solutions to enhance product brand recognition.

Contact Us

We have mature batch supply capabilities, and can purchase small batches for small and medium-sized enterprises, and large-scale order needs of large enterprises.

So if you want to know the price, then contact us now to get the latest quotation.

Phone Number/WeChat/WhatsApp

(86)-18291772322

E-mail

Ta-Nb@titanmsgp.com