Niobium tube pages often place purity, grade, seamless or welded construction and dimensions in different parts of the page. A buyer cannot compare them on the word niobium alone. This review records five first-party pages and identifies the fields that must return on one quotation line.
How the five niobium tube pages were selected
We froze the query niobium tube supplier manufacturer on 1 September 2026. Eligible results were accessible company-owned product pages directly about niobium tube or pipe. Beiyu, directories, market reports, third-party lists and duplicate domains were excluded. TMC Metal’s selected URL returned HTTP 404 at the direct-source gate; Fortu Tech moved to fourth and the next eligible company-owned tube page, Eagle Alloys, entered fifth. The order records that process and carries no supplier score.
| Company page | Construction or page role | Material wording | Published dimensions | RFQ check |
|---|---|---|---|---|
| Shanghai Metal Corporation | Page states seamless or welded routes made by extrusion, tube reduction or deep drawing | R04200 and R04210, purity ≥99.95% or 99.99%, ASTM B394; hard, semi-hard and soft states are listed | Processed to customer requirements; no numeric envelope stated | Return construction, exact grade/UNS, OD, wall, length, tolerance and agreed condition terminology |
| Baoji Hanz | Tube page with customized route; MOQ stated as 20 sticks | ASTM B394 and 99.95% minimum purity | 1-200 mm OD, 0.1-20 mm wall and 0.5-6 m standard length on the reviewed page | Which listed construction, grade/UNS, tolerances and certificate fields apply to the quoted sticks? |
| Heeger Metal | Seamless and welded tube/pipe; round, square and rectangular cross-sections are listed | ASTM B394, 99.5-99.99% purity; the data sheet spells the material strings “RO4200” and “RO4210” | 2-100 mm OD, 0.2-5.0 mm wall and 200-8,000 mm length; separate capillary table | Confirm the exact UNS spelling and whether the main or capillary tolerance table governs |
| Fortu Tech | Pure niobium tube and pipe; page later names seamless, cold-rolled and precision-drawn routes | ASTM B394 R04200 and R04210; the page also lists the broader B394 type family | A table gives individual OD/ID/wall/length combinations from 6 mm to 307 mm OD and says custom sizes are available | Which table row or drawing, construction, type/UNS and inspection scope is offered? |
| Eagle Alloys | Stock and custom niobium tubing and pipe | Commercially pure, reactor grade and multiple niobium-alloy families; ASTM B394 appears among multiple product-form standards | 0.039-6.500 in OD and up to 20 ft long on the reviewed page | Which alloy/UNS, construction, wall, condition and one product specification govern the selected size? |
The entries quote only the reviewed pages. A purity percentage, grade string and ASTM designation are not interchangeable fields. Where a page spells a designation unusually, the RFQ should ask for the exact UNS and standard that will be printed on the certificate rather than silently correcting the supplier’s text.
Choose the tube route before comparing the range
| Route | What to define | Why the public range is not enough |
|---|---|---|
| Standard seamless or welded tube | Grade/UNS, ASTM B394 when applicable, construction, OD, wall, length and condition | A page may combine both constructions without mapping every dimension to each |
| Capillary or precision tube | OD, ID or wall, tight tolerances, straightness, end condition, cleanliness and inspection method | The capillary table may have a different envelope and tolerance basis from the main tube table |
| Drawing-based large or alloy tube | Alloy, melt/product route, drawing revision, dimensions, NDE and heat-treatment/document scope | A maximum OD or “custom” label does not prove one alloy/construction combination |
ASTM B394 is a tube/pipe acceptance route for unalloyed niobium and niobium alloys, but the order still has to name the applicable type or UNS. Other standards displayed on a broad supplier page may belong to sheet, plate, bar or another product form and should not be copied onto a tube order without checking their scope.
Send one controlled niobium tube RFQ
| RFQ line | Required input | Required return |
|---|---|---|
| Material identity | Unalloyed or alloyed niobium, exact grade/UNS and purity or RRR requirement where relevant | One unambiguous material designation on quotation and MTC |
| Product route | Tube or pipe; seamless, welded, welded-and-drawn or another specified construction | The construction tied to the quoted dimensions |
| Dimensions | OD, wall or ID, tolerances, straightness, length and end condition | Finished dimensions in one governing unit |
| Condition and surface | Annealed/worked condition, surface finish, cleanliness and any roughness requirement | Named delivery condition and measurement basis |
| Service controls | Temperature, environment, vacuum/cleanliness duty and fabrication after receipt | Any limits or process recommendations explicitly tied to the order |
| Inspection and records | Chemistry, mechanical/dimensional tests, NDE, heat/lot traceability, certificate and witness scope | A document schedule linked to the supplied material |
Where Beiyu fits
Beiyu is not one of the five compared companies. Its live niobium pipe-and-tube page covers Nb1 and Nb1Zr routes, seamless or welded-and-drawn construction under ASTM B394 when specified, annealed condition, and an EN 10204 3.1 mill test certificate on request. Beiyu confirms the grade/UNS, construction, OD, wall, length, tolerances, surface, quantity and inspection/document scope before quoting.
How to use this comparison
Filter first by material and construction, then by an actual producible dimension. Send the same controlled line to the remaining companies. Do not compare a capillary quote with a standard tube quote, or a generic purity statement with a grade-certified product. The supplier qualification begins with the returned technical offer and evidence, not with the order of this list.
Related Beiyu pages
- Niobium pipe and tube
- Niobium bar and sheet
- Niobium versus tantalum selection
- Choosing a refractory metal
Published by Beiyu Titanium. Beiyu is outside the five-company set. The sequence is a dated search snapshot after the published exclusions, not a rating of purity, capability, delivery or suitability.
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Specification detail with sources
Beiyu Titanium publishes this list and is not part of the comparison above. For readers who want the publisher’s own figures on the same basis they would ask of any supplier on this page, the material is specified to ASTM B338, and each order carries an EN 10204 type 3.1 certificate with heat and pour numbers by order scope.
Beiyu supplies seamless tube OD 5 to 325 mm with 0.5 to 12 mm wall in lengths to 12000 mm, welded tube OD 6.35 to 1219 mm with 0.5 to 25.4 mm wall in lengths to 22000 mm, and capillary OD 1 to 5 mm with 0.1 to 2 mm wall.
These are Beiyu published supply figures and inspection parameters, not limits taken from the standard; limit values belong to ASTM B338 and are confirmed against the exact edition named on the purchase order. Certification is stated as a production capability, and no stock position, delivery time or price is implied by any figure on this page.