Niobium Rod

1. Brand: XZY
2. Catalog: Other Metals
3. Material: Niobium, Niobium Alloy
4. Grade: Nb1, Nb2, R04200, R04210
5. Purity: 99.7% 99.9%, 99.95%, 99.99%
6. Density: 8.57 g/cm3
7. Melting point: 2468 °C
8. Form: Rod, Bar, Wire, Tube, Pipe
9. Shape: Round, Square, Customization
10. Specification: 3~145mm diameter*L
11. Surface: Silver metal surface, Polished, Grinding, Ground finished, Lathe turning bright surface.
12. Processing Method: Sintering, Forging, Rotary Forging, Rolling, Machining.
13. Condition: Hard state, Half-hard state, Soft state
14. Application: Aerospace, nuclear industry and superconducting magnets.
15. Standard: ASTM B 392

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Product Introduction

Niobium rod is a cylindrical solid rod or bar made of high-purity metal niobium.

Product Specification

Niobium Rod Specifications and 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

Product Chemical Composition

Niobium Rod Chemical Composition
Element Composition%
Gr	Main Content		Impurities (≤ %)
Gr	Nb	Fe	Si	Ni	W	Mo	Ti	Ta	O	C	H	N
Nb1	Remainder	0.004	0.004	0.002	0.005	0.005	0.002	0.05	0.012	0.0035	0.0012	0.003
Nb2	Remainder	0.01	0.01	0.005	0.02	0.01	0.004	0.07	0.015	0.0050	0.0015	0.008

Material Grade:

R04200-Type 1 -Reactor grade pure niobium (unalloyed niobium)
R04210-Type 2 -Commercial grade pure niobium (unalloyed niobium)
R04251-Type 3 -Reactor grade niobium alloy containing 1 % zirconium
R04261-Type 4 -Commercial grade niobium alloy containing 1 % zirconium
R40220-Type 5 -RRR grade pure niobium

Product Properties

Niobium Rod Properties (Theoretical)
Symbol of element	Nb
CAS No	7440-03-1
Crystal structure	Body-centered cubic (BCC)
Atomic number	41
Molecular Weight/g·mol-1	92.91
Appearance	Silvery
Melting Point	2468 °C
Boiling Point	4742 °C
Density	8.57 g/cm3
Solubility in H2O	N/A
Poisson's Ratio	0.4
Young's Modulus	105 GPa
Vickers Hardness	1320 MPa
Tensile Strength	N/A
Thermal Conductivity (20°C) /W·(m·K)-1	53.7
Thermal Expansion (20°C) /K-1	7.08x10-6
Electrical Resistivity (20°C)/Ω·mm2·m-1	0.125
Electronegativity	1.6 Paulings
Specific Heat (20°C) /J·(g·K)-1	0.26
Heat of Vaporization	N/A

Niobium Product Rod and Bar Mechanical Properties (Annealed Condition)

Grade

Tensile strength,δb psi (MPa), ≥

Yield strength,δ0.2, psi (MPa), ≥

Elongation in 1"/2" gage length, %, ≥

R04200-1 R04210-2

Nb1, Nb2

18000 (125)

10500 (73)

Advantages

High Temperature Resistance

With a high melting point (~2468 °C), niobium rods maintain strength and stability in elevated temperature environments.

Corrosion Resistance

Resistant to most acids and aggressive media, suitable for chemical processing and corrosion-resistant equipment.

Good Ductility

Exhibits cold working performance, allowing forming, drawing, and machining into precise components.

Stable Mechanical Properties

Maintains consistent structure and performance after processing, ensuring reliability in demanding applications.

Superconducting Capability

Widely used in superconducting materials and advanced electronic applications due to its unique electrical properties.

Product Application

Aerospace Industry

Used for aircraft engine components and rocket nozzles

Chemical Processing

Used in reactors, heat exchangers, and other equipment exposed to aggressive chemicals and high temperatures

Electronics & Superconductors

Essential for superconducting magnets, electronic devices, and in the production of high‑performance capacitors

Medical Implants

Used in medical devices and implants, ensuring long-term durability.

Metalworking & Manufacturing

Used for precision components, including high-temperature furnace parts

FAQ

Can you customize the size and shape of the niobium rod?

Yes, we offer customized sizes, lengths, and diameters according to your specific needs and technical requirements.

What is the lead time for niobium rod orders?

For standard sizes, delivery is typically within 7–15 working days. Custom orders may take slightly longer depending on production complexity.

How do you ensure the quality of niobium rods?

Our niobium rods are manufactured under ISO 9001 standards. We conduct strict quality control throughout the entire production process, including material inspection, machining, and final testing.

Can you provide samples of niobium rods?

Yes, we can provide samples for testing. Please contact us to discuss the sample size and shipping details.

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