Precision customization: Round, square, coil and U-shape; seamless or welded; sizes made to drawing; small-batch sampling supported.
High-temperature & corrosion resistance: Performs in aggressive atmospheres and elevated temperatures for steel, ceramics, nuclear and superconducting systems.
Electrical performance: Stable conductivity and low-temperature behavior for superconducting and electronic applications.
Process control & QA: Eddy current, flaring/flattening, mechanical, microstructure and ultrasonic testing for critical projects.
Steel & ceramics: High-temp furnace components, linings and structural supports.
Electronics & superconductors: Conductive and structural tubes, magnet components, cryogenic systems.
Nuclear energy: Cooling lines, structural tubes and radiation-related components in demanding environments.
Eddy current testing
Flaring and flattening tests
Mechanical tests (tensile, yield, elongation)
Microstructure examination
Ultrasonic testing
Send your specifications (grade, size, quantity) — quotation and lead time within 12 hours. Trial orders with flexible MOQ are supported for evaluation and qualification. All materials are supplied with EN 10204 3.1 MTC and full inspection documentation for export compliance.
LuminaTitanium supplies high-performance niobium tube/pipe manufactured to ASTM B394. Available in seamless and welded forms, round/square/coil/U-shape configurations and custom dimensions, these tubes offer excellent high-temperature strength, corrosion resistance and electrical stability for steel, ceramics, electronics, superconductors and nuclear applications.
| Parameter | Details | Why It Works for You |
|---|---|---|
| Materials | R04200, R04210, R04251, R04261 | Covers unalloyed and Zr-alloyed niobium for critical service |
| Standard | ASTM B394 | Recognized specification for niobium and niobium-alloy tubes |
| Form | Round, square, coil, U-shape | Fits straight runs, coils and U-tube layouts |
| Size | Custom per drawings | Matches exact design; minimizes secondary machining |
| Length | Standard & cut length | Aligns with equipment and system requirements |
| Technique | Seamless or welded | Seamless for high-pressure/critical duty; welded for cost efficiency |
| Surface | Polished or as specified | Meets corrosion, cleanliness and cosmetic needs |
| Packing | Seaworthy wooden case | Secure export protection |
| Property | Value |
|---|---|
| Density | 8.57 g/cm³ |
| Melting Point | 2468 °C |
| Boiling Point | 4742 °C |
| Thermal Conductivity | 0.537 W/cm·K @ 298.2 K |
| Electrical Resistivity | 12.5 μΩ·cm (approx., near room temperature) |
| Electronegativity | 1.6 (Pauling) |
| Specific Heat | 0.064 cal/g·K @ 25 °C |
| Heat of Fusion | 6.5 cal/g·mol |
| Grade | Chief (Nb) | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nb1 | Remainder | 0.004 | 0.003 | 0.002 | 0.004 | 0.004 | 0.002 | 0.07 | 0.010 | 0.004 | 0.0012 | 0.002 |
| Nb2 | Remainder | 0.005 | 0.005 | 0.005 | 0.010 | 0.010 | 0.004 | 0.10 | 0.015 | 0.010 | 0.0015 | 0.010 |
| Grade (UNS) | Tensile Strength min. | Yield Strength min. | Elongation min. |
|---|---|---|---|
| R04200 | 18000 psi (125 MPa) | 10500 psi (73 MPa) | 25% |
| R04210 (Welded) | 18000 psi (125 MPa) | 8500 psi (59 MPa) | 25% |
| R04210 (Seamless) | 18000 psi (125 MPa) | 10500 psi (73 MPa) | 25% |
| R04251 | 28000 psi (195 MPa) | 18000 psi (125 MPa) | 20% |
| R04261 | 28000 psi (195 MPa) | 18000 psi (125 MPa) | 20% |
Standard & grade: ASTM B394; R04200 / R04210 / R04251 / R04261 or Nb1 / Nb2
Form & geometry: round / square / coil / U-tube; OD / WT / ID / length; exchanger or furnace layout if applicable
Technique: seamless or welded; design pressure and medium requirements
Surface finish: polished or specified roughness/cleanliness
Testing & QA: EC, flaring/flattening, mechanical, UT, microstructure; third-party witnessing if required
Documentation: MTC EN 10204 3.1; inspection reports; RoHS/REACH on request
Quantity & packaging: batch size; packing configuration; export wooden cases
End use: steel/ceramics, superconductors, nuclear, etc., to confirm optimal grade and configuration
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