Niobium Rod/Bar

Standard: ASTM B392

Purity: 99.5%-99.99%

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

Niobium Rod/Bar is a high-performance material through forging niobium metal, exhibiting excellent ductility, high-temperature resistance, corrosion resistance, and superconducting properties. As a leading supplier and manufacturer of premium niobium products, Heeger Materials leverages advanced machining centers to deliver high-precision niobium rods and bars for wide ranges of applications.

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Niobium Rod/Bar Data Sheet

Reference:	HMNB1102
Dimensions:	Diameter: 3-120 mm Length: TBD (To Be Determined)
Standard:	ASTM B392
Material:	RO4200, RO4210
Purity:	99.5%-99.99%
Density:	8.57 g/cm3
Melting point:	2468 ℃
Temper:	Annealed or Unannealed

Niobium Rod and Niobium Bar

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 seamless and welding niobium rods and bars with various specifications for many applications. The customized solutions are available according to specific requirements.

Niobium Rod
Niobium Bar

Niobium Rod/Bar Material Chemical Composition

Material	Main Elements (%)	Impurities (≤%)
Material	Nb	Fe	Si	Ni	W	Mo	Ti	Ta	O	C	H	N
RO4200	Bal.	0.004	0.004	0.002	0.005	0.005	0.002	0.07	0.015	0.0040	0.0015	0.003
RO4210	Bal.	0.01	0.01	0.005	0.02	0.01	0.004	0.10	0.02	0.01	0.0015	0.01

Niobium Rod/Bar 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 Rod/Bar Specifications ＆ Tolerances

Diameter (mm)	Diameter Tolerance (mm)	Length Tolerance (mm)
3～4.5	±0.05	±2
4.5～6.5	±0.05	±2
6.5～10.0	±0.10	±2
10.0～16.0	±0.15	±2
16.0～18.0	±0.15	±2
18.0～25.0	±0.30	±2
25.0～40.0	±0.50	±2
40.0～50.0	±0.60	±2
50.0～65.0	±0.70	±2
65.0～95.0	±1.00	±2

Niobium Rod/Bar 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 Rod/Bar Processing Method

Sintering
Forging
Rotary Forging
Rolling
Polishing

Niobium Rod/Bar Surface Finish

Depending on the intended applications, niobium rods and bars 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.
Ground: The surface is centerless ground to remove all coating and to achieve precise dimensions control.

Niobium Rod/Bar Applications

Aerospace: Engine parts and rocket nozzles
Nuclear: Fuel cladding and control rods
Superconducting: Superconducting magnets and MRI equipment
Chemical: Corrosion-resistant equipment like reactors and pipes
Electronics: Capacitors and high-performance components

Niobium Rod/Bar Packaging

The Niobium Rod and Niobium Bar are 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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To customize your niobium rod or niobium bar, please provide the following details:

Diameter x Length (for rods)
Length x Width x Height (for bars)
Quantity of the rods or bars 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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Other Niobium Products

Heeger Metal offers a comprehensive range of niobium and niobium alloy products, including powders and finished parts, with customization options available. Known for their exceptional strength, corrosion resistance, and high-temperature stability, these materials are ideal for aerospace, electronics, and chemical processing applications. Our high-purity niobium ensures reliable performance and durability in the most demanding environments.

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Niobium Rod/Bar

Other Rod/Bars Products

Heeger Metal supplies refractory metal and alloy rods/bars made from high-performance materials like tungsten, molybdenum, and tantalum. These rods offer excellent strength, high melting points, and resistance to wear and corrosion, making them ideal for aerospace, electronics, and high-temperature applications. Available in various sizes, they can be customized to meet specific needs.