Niobium Wire

Standard: ASTM B392

Purity: 99.5%-99.99%

Custom sizes and standard sizes in stock
Quick Lead Time
Competitive Price

Niobium Wire is drawn from high-purity niobium rod with excellent strength, high temperature resistance, corrosion resistance, and good superconducting properties. We can supply niobium wire in straight, coil and spooled forms. As a leading supplier and manufacturer of premium niobium products, Heeger Materials leverages advanced machining centers to deliver high-precision niobium wire for wide ranges of applications.

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Or email us at sales@heegermaterials.com.

Niobium Wire Data Sheet

Reference:	HMNB1103
Dimensions:	Diameter: 0.25-3 mm Length: TBD (To Be Determined)
Standard:	ASTM B392, ASTM B655/B655M
Material:	RO4200, RO4210, RO4251, RO4261, RO4295
Type:	Straight, Coil, or Spooled
Purity:	99.5%-99.99%
Density:	8.57 g/cm3
Melting point:	2468 ℃
Temper:	Annealed or Unannealed

Niobium Wire

Niobium is a rare, silvery-gray transition metal with excellent corrosion resistance and high strength at high temperatures. It is widely used in aerospace, nuclear energy, superconducting technology, and the chemical industry, and is ideal for producing superconducting materials due to its high superconducting transition temperature. HM can supply high-quality niobium wires with wide ranges of wire diameters. The customized solutions are available according to specific requirements.

Niobium Wire-Straight Wire
Niobium Wire-Coiled Wire
Niobium Wire-Spooled Wire

Niobium Wire Material Chemical Composition

Material	Main Element (%)	Impurities (≤%)
Material	Nb	Fe	Si	Ni	W	Mo	Ti	Ta	Zr	Hf	O	C	H	N
RO4200	Bal.	0.0040	0.0040	0.0020	0.0050	0.0050	0.0020	0.0700	0.0200	0.0200	0.0150	0.0040	0.0015	0.0030
RO4210	Bal.	0.0100	0.0100	0.0050	0.0200	0.0100	0.0040	0.1000	0.0200	0.0200	0.0200	0.0100	0.0015	0.0100
RO4251	Bal.	0.0050	0.0050	0.0050	0.0300	0.0100	0.0200	0.1000	0.8-1.2	0.0200	0.0150	0.0100	0.0015	0.0100
RO4261	Bal.	0.0500	0.0050	0.0050	0.0500	0.0500	0.0300	0.5000	0.8-1.2	0.0200	0.0250	0.0100	0.0015	0.0100
RO4295 (ASTM B655/B655M)	Bal.	—	—	—	0.5000	—	0.7-1.3	0.5000	0.700	9-11	0.0250	0.0150	0.0015	0.0100

Niobium Wire Mechanical Properties

Grade	Tensile strength psi(MPa), ≥	Yield strength δ0.2, psi (MPa),≥	Elongation in 1″/2″ gage length, %, ≥
			>=0.010	<0.010
RO4200, RO4210	18000 (125)	12000 (85)	25	20

Niobium Wire Production Process

Raw Material: Select high-purity niobium powder.
Powder Metallurgy: Mix with binder and compact into a green billet.
Sintering: High-temperature sintering to remove the binder and increase density.
Drawing: Draw the rod to achieve the desired size and finish.
Heat Treatment: Anneal to relieve stress and enhance properties.
Surface Treatment: Clean and polish the surface.
Cutting & Customization: Cut or customize according to requirements.

Niobium Wire Processing Method

Sintering
Forging
Rotary Forging
Rolling
Polishing

Niobium Wire Surface Finish

Depending on the intended applications, niobium tubes and pipes have three main surface finishes as follows:

Black: The surface is “as swaged” or “as drawn”, retaining a coating of processing lubricants and oxides.
Cleaned: The surface is chemically cleaned to remove all lubricants and oxides.

Niobium Wire Applications

Superconducting Materials: Niobium wires are widely used in the field of superconductivity and are commonly used to produce superconducting cables, superconducting magnets, and other devices, especially in particle gas pedals and nuclear magnetic resonance (NMR) instruments.
Nuclear Industry: Niobium wires are commonly used as structural materials in nuclear reactors and nuclear fuel jacket materials due to their low neutron capture cross section and high corrosion resistance.
Aerospace: Due to its excellent high-temperature strength and heat resistance, niobium wire is often used to manufacture high-temperature components, such as engine components for rockets and airplanes.
Electronic Components: Niobium wires are used as acid and liquid metal corrosion-resistant materials in manufacturing boilers, heaters, and other equipment.
Chemical Industry: Niobium wires are used as acid and liquid metal corrosion-resistant materials for boilers, heaters, and other equipment.

Niobium Wire Packaging

The Niobium Wire is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.

Niobium Properties

Item	Value
Atomic number	41
Crystal structure	Body centred cubic
Electronic structure	Kr 4d⁴ 5s¹
Valences shown	2, 3, 4, 5
Atomic weight( amu )	92.9064
Thermal neutron absorption cross-section( Barns )	1.15
Photo-electric work function( eV )	4.3
Atomic radius – Goldschmidt( nm )	0.147
Ionisation potential( No./eV )	3/ 25.0
Ionisation potential( No./eV )	2/ 14.3
Ionisation potential( No./eV )	6/ 103
Ionisation potential( No./eV )	1/ 6.88
Ionisation potential( No./eV )	4/ 38.3
Ionisation potential( No./eV )	5/ 50.5

Item	Value
Material condition / Temper	Annealed (Soft)
Material condition / Temper	Un-annealed (Hard)
Poisson’s ratio	0.397
Poisson’s ratio	0.397
Bulk modulus( GPa )	170.3
Bulk modulus( GPa )	170.3
Tensile modulus( GPa )	104.9
Tensile modulus( GPa )	104.9
Izod toughness( J m⁻¹ )	10-120
Hardness – Vickers( kgf mm⁻² )	115
Hardness – Vickers( kgf mm⁻² )	160
Tensile strength( MPa )	330
Tensile strength( MPa )	585
Yield strength( MPa )	550
Yield strength( MPa )	240

Item	Value
Electrical resistivity( µOhmcm )	16@20@20°C
Superconductivity critical temperature( K )	9.25
Temperature coefficient( K⁻¹ )	0.0026@0-100°C

Item	Value
Boiling point( °C )	4742
Density( gcm⁻³ )	8.57@20°C

Item	Value
Melting point( °C )	2468
Latent heat of evaporation( J g⁻¹ )	7360
Latent heat of fusion( J g⁻¹ )	290
Specific heat( J K⁻¹ kg⁻¹ )	268@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	53.7@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	7.2@0-100°C

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SAFETY DATA SHEET (SDS) – Niobium and Niobium Alloys

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We will check and get back to you in 24 hours.

To customize your niobium wire, please provide the following details:

Diameter (for the wire)
Length (Indicate the length you need)
Purity (Specify the purity of material required.)
Form (Straight, coiled, or spooled)
Surface Finish (polished, rough, oxide-coated, etc.)
Quantity of the wires you need
Alternatively, you can provide a drawing with your specifications.

Once we have these details, we can provide you with a quote within 24 hours.

We carry a wide variety of niobium and niobium alloy products in stock, and for these, there is generally no minimum order requirement. However, for custom orders, we typically set a minimum order value of $200. The lead time for stock items is usually 1-2 weeks, while custom orders usually take 3-4 weeks, depending on the specifics of the order.

DFARS (Defense Federal Acquisition Regulation Supplement) compliance is primarily concerned with the sourcing of materials for defense-related applications in the United States. According to DFARS, certain materials used in defense must be sourced from the United States or qualifying countries.

If you have specific niobium materials that are subject to DFARS, please let us know in advance and we will confirm.

At Heeger Materials Inc., we take this responsibility seriously. We adhere to all applicable laws and regulations, including Section 1502 of the Dodd-Frank Act. Our company operates with a strict code of ethics and is committed to only partnering with suppliers who share our dedication to responsible sourcing. We support the initiatives and programs aimed at promoting “conflict-free” supply chains and work diligently to ensure that our products meet these standards.

Heeger Materials Inc., established in 2016 in Colorado, USA, is a specialized supplier and manufacturer of tantalum and tantalum alloys. With extensive expertise in supply and export, we offer competitive pricing and customized solutions tailored to specific requirements, ensuring outstanding quality and customer satisfaction. As a professional provider of refractory metals, specialty alloys, spherical powders, and various advanced materials, we serve the research, development, and large-scale industrial production needs of the scientific and industrial sectors.

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