Niobium Rod/Bar

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. Shanghai Yuepeng can supply high-quality seamless and welded niobium rods and bars with various specifications for many applications. The customized solutions are available according to specific requirements.

Niobium Rod/Bar Material Chemical Composition

Material	Main Elements (%)	Impurities (≤%)
	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.
• 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 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 dimension 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/Bar 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.