Niobium Crucible

Niobium Crucible

Niobium Crucible

Standard: ASTM B394

Material: R04200, R04210, R04251, R04261, R04295

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Niobium Crucible is made of high-purity niobium metal, highly resistant to high temperatures and deformation. According to the processing method, niobium crucible can be divided into four forms including stamping, machining, sintering, and welding. As a leading supplier and manufacturer of premium niobium products, Heeger Materials leverages advanced machining centers to deliver high-precision niobium and niobium alloy crucible for wide ranges of applications.

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Niobium Crucible Data Sheet

Reference:HMNB1101
Dimensions:Customized
Standard:ASTM B394
Material:R04200, R04210, R04251, R04261, R04295
Type:Stamping, Machining, Sintering, and Welding
Shape:Cylinder, Conical, Square, or customized
Surface:Polished, Vannum Annealed, Cold-rolled Bringht
Purity:99.5%-99.99%
Temper:Annealed or Unannealed

Niobium Crucible

Niobium Crucible, also called niobium cup, is manufactured by high-purity niobium metal, which exhibits excellent corrosion resistance and high strength at high temperatures. They are widely used in rare earth smelting, high-temperature sintering, special glass melting, and corrosion-resistant vessels in the chemical industry. HM can supply high-quality niobium crucibles with a wide range of specifications. The customized solutions are available according to specific requirements.

  • Niobium Crucible 2
  • Niobium Crucible 1
  • Niobium Crucible 3

Niobium Crucible Material Chemical Composition

MaterialMain Element (%)Impurities (≤%)
NbFeSiNiWMoTiTaZrHfOCHN
RO4200Bal.0.00400.00400.00200.00500.00500.00200.07000.02000.02000.01500.00400.00150.0030
RO4210Bal.0.01000.01000.00500.02000.01000.00400.10000.02000.02000.02000.01000.00150.0100
RO4251Bal.0.00500.00500.00500.03000.01000.02000.10000.8-1.20.02000.01500.01000.00150.0100
RO4261Bal.0.05000.00500.00500.05000.05000.03000.50000.8-1.20.02000.02500.01000.00150.0100
R04220Bal.0.00500.00500.00300.0070—0.00500.10000.0100—0.00400.00300.00050.0030
RO4295Bal.———0.5000—0.7-1.30.50000.7009-110.02500.01500.00150.0100

Niobium Crucible Mechanical Properties

Mechanical Properties Of Annealed Condition

GradeTensile strength
psi(MPa), ≥		Yield strength
δ0.2, psi (MPa),≥		Elongation in 1″/2″ gage length, %, ≥
>=0.010<0.010
R04200, R0421018000 (125)10500 (73)2015
R04251, R0426128000 (195)18000 (125)2015
R04220 (RRR Grade)14000 (95)7200 (50)3030

Niobium Crucible Processing Method

Niobium Crucible can be classified into four types according to the processing methods, including stamping, machining, sintering, and welding. The detailed processes are as follows:

  • Material Selection and Purification: High-purity niobium (99.9%+) is selected, and impurities are removed using methods like vacuum arc remelting (VAR).
  • Melting and Casting: Niobium is melted in a vacuum arc furnace and then cast into ingots or billets for further processing.
  • Hot Working: The niobium is forged or extruded into semi-finished shapes like discs or rods to improve grain structure and shape.
  • Shaping and Forming: Niobium is stamped, pressed, or deep-drawn into crucible shapes, followed by machining for precise dimensions.
  • Heat Treatment: Annealing or vacuum heat treatment is performed to relieve stresses and enhance strength and corrosion resistance.
  • Surface Finishing: Grinding, polishing, and coating (if needed) are done to achieve a smooth surface and improve durability.

Niobium Crucible Applications

  • Rare Earth Smelting: Niobium crucibles are able to withstand high temperatures and corrosive environments, making them ideal for use in the smelting process of rare earth metals.
  • High-temperature Sintering: Niobium crucibles are used for sintering ceramics, metal powders, and other materials in high-temperature sintering processes.
  • Chemical Industry: Niobium crucibles are used as chemical-resistant containers for handling strong acids, alkalis, and other corrosive chemicals.
  • Sputtering and Evaporation: Niobium crucibles are used for sputtering and evaporating materials in the physical vapor deposition (PVD) process to prepare thin films.

Niobium Crucible Packaging

The Niobium Crucible 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.

Metal Packing

Niobium Properties

ItemValue
Atomic number41
Crystal structureBody centred cubic
Electronic structureKr 4d⁴ 5s¹
Valences shown2, 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
ItemValue
Material condition / TemperAnnealed (Soft)
Material condition / TemperUn-annealed (Hard)
Poisson’s ratio0.397
Poisson’s ratio0.397
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
ItemValue
Electrical resistivity( µOhmcm )16@20@20°C
Superconductivity critical temperature( K )9.25
Temperature coefficient( K⁻¹ )0.0026@0-100°C
ItemValue
Boiling point( °C )4742
Density( gcm⁻³ )8.57@20°C
ItemValue
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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To customize your niobium crucible, please provide the following details:

  1. Diameter 
  2. Wall Thickness
  3. Height
  4. Tolerances
  5. Purity (Specify the purity of material required.)
  6. Surface Finish (polished, rough, oxide-coated, etc.)
  7. Quantity of the products you need
  8. 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.

Other Crucible Products

Heeger Metal specializes in high-quality customized metal crucibles and alloy crucibles, designed to withstand extreme temperatures for melting and casting applications. Made from durable materials, our crucibles ensure excellent performance in industries such as metallurgy and material science. For more details or custom solutions, feel free to contact us.

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