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High-Quality-Pure-Niobium-Foils-(1).jpg
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Pure Niobium Foils/Niobium Strips: Specialized Solutions for Industrial & Laboratory Applications

Pure niobium foils/strips of R04200 grade are thin-gauge sheet products manufactured from high-purity commercially pure niobium (Nb content ≥ 99.95%, complying with ASTM R04200 grade) through multiple processes including vacuum melting, hot rolling, cold rolling, and annealing. Generally, products with a thickness of ≤0.1mm are classified as foils, while those with 0.1-1.5mm are strips. They are mainly used in scenarios such as high-temperature electronic component manufacturing, aerospace thermal protection systems, chemical corrosion-resistant equipment, laboratory precision instruments, and superconducting material substrates. As a classic ASTM grade of high-purity niobium-based materials, R04200 possesses outstanding high-temperature stability (capable of long-term stable operation below 1200℃ and short-term resistance to 1600℃), excellent corrosion resistance (strong tolerance to most acids, alkalis, molten salts, and high-temperature gases, especially stable in highly corrosive chemical media), as well as ultra-pure impurity-free properties, excellent ductility, and prominent electrical conductivity. These characteristics make it a core material in fields requiring extremely high material thickness accuracy, surface quality, and environmental resistance, especially suitable for thin-gauge, high-precision, and extreme-environment applications.

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    Product specification

    Product Parameters
    Product Information
    Product Name  Pure Niobium Foils, Pure Niobium Strips
    Brand Name  Yunjie
    Model  R04200 (ASTM Standard)
    Material  High-Purity Niobium (Commercially pure niobium, complying with ASTM R04200 grade)
    Processes  Vacuum Melting, Hot Rolling, Cold Rolling, Annealing, Finishing, Surface Treatment
    Minimum Niobium Content  Meets ASTM R04200 high-purity grade standards (Nb content ≥ 99.95%)
    Density  8.57g/cm³
    Advantages  Excellent high-temperature stability, superior corrosion resistance, good electrical conductivity, ultra-pure material, excellent ductility, high dimensional accuracy, fine surface finish
    Surface Conditions  Pickled Surface, Bright Annealed Surface, Cold-Rolled Bright Surface
    Delivery Conditions  Soft State (M), Hard State (Y)
    Processing Services  Customized dimensions (width, thickness, length), slitting, cutting, stamping forming
    Minimum Order Quantity  1kg (Calculated based on actual orders; preferential terms available for bulk purchases)

    Item

    Regular Specifications (Pure Niobium Foils)

    Regular Specifications (Pure Niobium Strips)

    Customization Range

    Thickness

    0.02mm—0.1mm

    0.1mm—1.5mm

    0.02mm—2.0mm, customizable per customer requirements

    Width

    10mm—500mm

    10mm—500mm

    5mm—1000mm and above, customizable per customer requirements

    Length

    1000mm—5000mm (single sheet); 50m—500m (coiled)

    1000mm—6000mm (single sheet); 50m—1000m (coiled)

    Customizable on demand (both single sheets and coils available)

    Tolerance Range

    Thickness tolerance: ±0.001mm—±0.005mm; Width tolerance: ±0.1mm—±0.5mm (compliant with ASTM B393 standard)

    Thickness tolerance: ±0.005mm—±0.02mm; Width tolerance: ±0.1mm—±1.0mm (compliant with ASTM B393 standard)

    Tolerance customizable per customer precision requirements

    Surface Roughness

    Polished surface: Ra≤0.2μm; Bright annealed surface: Ra≤0.8μm

    Polished surface: Ra≤0.4μm; Bright annealed surface: Ra≤1.0μm

    Surface roughness customizable on demand

    Classification

    High-Quality-Pure-Niobium-Foils-(1)
    • Classification by Product Form
      •Pure Niobium Foils: Thickness ≤0.1mm, ultra-thin and lightweight, with excellent ductility and electrical conductivity. Suitable for precision electronic component electrodes, laboratory microdevices, superconducting material substrates, ultra-thin corrosion-resistant coating carriers, etc., and can undergo high-precision stamping and cutting processes.
      •Pure Niobium Strips: Thickness 0.1-1.5mm, combining flexibility and structural strength. Suitable for metal composite strips, chemical corrosion-resistant pipe fittings, aerospace small structural components, battery current collector substrates, etc., and can be subjected to slitting, bending, welding, and other processes.
    • Classification by Processing State
    • Classification by Surface Treatment Method

    Specification Selection Table and Composition Table

    Pure Niobium Foil/Strip Specification Selection Table
    Chemical Composition Table

    Product Type

    Specification Range

    Core Features

    Application Scenarios

    Laboratory-Grade Precision Pure Niobium Foils

    Thickness: 0.02-0.05mm; Width: 10-300mm; Length: 100-5000mm (single sheet/coil)

    Ultra-pure material (Nb≥99.95%), minimal thickness tolerance, smooth surface, excellent ductility, easy cutting and forming

    Laboratory precision experimental devices, superconducting material R&D, micro-sensor components, university research projects

    Industrial-Grade Universal Pure Niobium Foils

    Thickness: 0.05-0.1mm; Width: 50-500mm; Length: 500-5000mm (single sheet)/50-500m (coil)

    High dimensional accuracy, clean surface, excellent corrosion resistance, stable processing performance, available for bulk supply

    High-temperature electronic component electrodes, small corrosion-resistant parts, precision instrument accessories, metal composite substrates

    Industrial-Grade Standard Pure Niobium Strips

    Thickness: 0.1-0.8mm; Width: 10-500mm; Length: 1000-6000mm (single sheet)/50-1000m (coil)

    Combines strength and flexibility, stable high-temperature performance, good weldability, high slitting accuracy

    Chemical corrosion-resistant pipe fittings, battery current collectors, aerospace small structural components, mechanical seals

    Customized Pure Niobium Foils/Strips

    Customized per customer drawings (thickness, width, length, surface roughness)

    Strong adaptability, performance optimized on demand, high personalization, strict matching with customer equipment and process requirements

    Special-specification electronic devices, customized high-temperature equipment, high-end equipment supporting parts, specialized experimental devices

    Grade

    Nb

    Impurity Content, Max. (≤)

    Fe

    Si

    Ni

    C

    N

    O

    H

    Zr

    Nb1

    ≥99.95

    0.005

    0.005

    0.005

    0.01

    0.01

    0.015

    0.0015

    0.02

    Cr

    Ta

    Mo

    W

    Ti

    Co

    Al

    　

    0.002

    0.1

    0.01

    0.03

    0.02

    0.002

    0.002

    　

    Characteristics

    01
    Excellent High-Temperature Stability
    Pure niobium has a melting point of up to 2468℃, enabling long-term stable operation below 1200℃ and short-term resistance to 1600℃. It maintains good mechanical properties and corrosion resistance in high-temperature environments, suitable for medium-high temperature and extreme high-temperature working conditions.
    advantage-2
    02
    Superior Corrosion Resistance
    Exhibits strong stability in harsh environments such as strong acids (excluding hydrofluoric acid), alkalis, molten salts, and high-temperature oxidizing atmospheres. The dense oxide film formed on the surface can effectively resist corrosion without contaminating the contacting medium, especially suitable for thin-gauge material applications in highly corrosive environments.
    advantage-2
    03
    Ultra-Pure Impurity-Free Material
    Complies with ASTM R04200 high-purity grade standards, with Nb content ≥ 99.95% and extremely low impurity content. It does not chemically react with contacting materials, ensuring the safety and stability of product use, especially suitable for high-precision electronics, laboratories, superconductivity, and other scenarios requiring strict material purity.
    advantage-2
    04
    Outstanding Processing Performance
    Excellent ductility allows ultra-thin rolling (minimum thickness up to 0.02mm), and it can undergo various secondary processes such as stamping, cutting, bending, welding, and slitting, meeting the preparation requirements of components of different shapes and specifications.
    advantage-2
    05
    High-Precision Dimensional Control
    Through precision cold rolling and finishing processes, it achieves minimal thickness and width tolerances, high surface flatness, and good dimensional consistency, which can accurately match the assembly requirements of high-end equipment and improve the performance stability of end products.
    advantage-2
    06
    Excellent Surface Quality
    Various surface treatment processes can achieve different finish requirements, with surfaces free of oxide scale, scratches, and impurities. This not only enhances corrosion resistance but also meets the high-end surface appearance requirements of electronics, optics, aerospace, and other fields.
    advantage-2

    Production Process

    1. Raw Material Preparation: Niobium ore undergoes mineral processing, enrichment, reduction, and other processes to extract high-purity sponge niobium, which is then refined through multiple vacuum arc furnace meltings to produce high-purity niobium ingots meeting ASTM R04200 grade standards (Nb content ≥ 99.95%, uniform composition, extremely low impurity content).
    2. Hot Rolling Processing: Niobium ingots are heated to a specific temperature and then hot-rolled into uniform-thickness niobium billets, eliminating internal defects of the ingot and improving material density.
    3. Cold Rolling Processing: According to the required finished product thickness, the hot-rolled billets undergo multiple passes of cold rolling, with precise control of the reduction per pass, gradually rolling into pure niobium foil/strip billets close to the finished product specifications to ensure dimensional accuracy.
    4. Intermediate Annealing: Intermediate annealing is inserted during the cold rolling process to eliminate processing internal stress, restore material plasticity, and avoid cracking, deformation, and other problems in subsequent processing.
    High-Quality-Pure-Niobium-Foils-(2)
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    Production Process

    1. Finished Product Annealing: According to the processing state (soft state, semi-hard state, hard state) required by customers, the cold-rolled pure niobium foils/strips undergo finished product annealing treatment, with precise control of annealing temperature and holding time to ensure material properties meet standards.
    2. Surface Treatment: The annealed pure niobium foils/strips undergo surface treatment, including pickling (to remove oxide scale), bright annealing (to improve surface finish), or polishing (to achieve a high mirror effect), ensuring surface quality.
    3. Finishing & Inspection: The finished products are trimmed, slit, and cut to meet customer size requirements; subsequent rigorous inspections include composition re-testing (precise control of impurity content), dimensional accuracy testing, surface quality testing, mechanical property testing, etc. This ensures that product quality meets the requirements of ASTM R04200 grade and ASTM B393 standard, accompanied by material inspection reports and quality certificates.

    Application Fields

    01
    Electronic Industry
    High-temperature electronic component electrodes, semiconductor device packaging materials, superconducting material substrates, battery current collectors. Relying on high purity, high conductivity, and high-temperature stability, it ensures the stable operation of electronic devices in extreme environments.
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    02
    Chemical Industry
    Lining of pipelines for transporting strong corrosive media, anti-corrosion coatings of chemical reactors, seals for precision chemical instruments. Utilizes excellent corrosion resistance to extend equipment service life and improve production safety.
    6511419c2763338526
    03
    Laboratory Research
    Precision experimental devices, special material R&D substrates, high-temperature micro-reaction vessels. Ultra-pure material without impurity contamination ensures experimental precision and data accuracy.
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    04
    Aerospace
    Small structural components, high-temperature corrosion-resistant accessories, lightweight composite material substrates. Combines high strength and extreme environmental tolerance to meet the rigorous requirements of the aerospace field.
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    05
    Medical Devices
    Small medical corrosion-resistant parts, precision medical instrument accessories. Resistant to corrosion by biological fluids, safe and non-toxic material, compliant with medical device hygiene standards.
    6511419c2763338526
    06
    New Energy Field
    High-temperature fuel cell components, seals for hydrogen-related equipment, superconducting energy storage materials. Meets the purity and corrosion resistance requirements of new energy materials, improving the performance and safety of energy equipment.
    6511419c2763338526

    Send Inquiry

    As a professional expert providing pure niobium (R04200, compliant with ASTM B393 standard) and comprehensive solutions for various metal foils/strips, pipes, rods/wires, plates, and crucibles, Baoji Yunjie is ready to serve you at any time! For a full range of metal materials and products such as titanium, niobium, zirconium, nickel, aluminum, tantalum, tungsten, and cobalt, please feel free to contact us!