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MOLYBDENUM · TZM · MO-LA · TUBES & CAPILLARIES
Choose pure molybdenum, TZM or Mo-La tubing for your required geometry and operating conditions. Send the outside diameter, wall or bore, length and material condition for a configuration-specific quotation.
Existing MetalsTek TZM tube photograph. The requested material and geometry are confirmed during quotation.
Capillary geometry and alloy chemistry are separate specifications. The 99.95% minimum listed for pure molybdenum does not define the composition of TZM or Mo-La.
Small-bore tube requests are reviewed by OD, wall or ID, length, straightness, surface and selected material. Specify pure Mo or TZM explicitly.
Published options include Mo, Mo-1 and Mo-2. State the grade definition, purity requirements and dimensions; the catalogue envelope is not a stock list.
Specify TZM alloy chemistry and material condition separately from pure-Mo purity. Include the required dimensions and any mechanical acceptance criteria.
The published Mo-La option lists 0.3–0.7% La₂O₃. Confirm composition basis, material condition, dimensions and finished-surface requirements.
| Parameter | Published catalogue option |
|---|---|
| Pure-Mo material / purity | Molybdenum, Mo-1 or Mo-2; published pure-Mo purity 99.95% minimum. Confirm grade and chemical acceptance limits. |
| Capillary size starting points | Published minimum OD 0.5 mm (approximately 0.02 in); minimum wall 0.1 mm; tailored length. The feasible OD / wall / length combination requires review. |
| Pure-Mo tube / pipe envelope | Diameter 0.5–600 mm; wall 0.1–30 mm; length 5–6,000 mm. Confirm the intended diameter definition and actual dimensional combination. |
| TZM tube / pipe envelope | Diameter 0.5–400 mm; wall 0.1–30 mm; length 5–6,000 mm. Alloy chemistry and condition are specified separately. |
| Mo-La composition / size | La₂O₃ 0.3–0.7%; diameter 0.8–20 in; length ≤106 in. Confirm composition basis and actual availability. |
| Mo / TZM surface options | Polished (catalogue notation Ra <3.2), chemically cleaned. Confirm roughness unit, measurement method and whether the requirement applies to OD, bore or both. |
| Mo-La surface options | As-rolled, chemically cleaned, polished or ground; define the required finished surfaces. |
These are published catalogue ranges, not measured batch results or a promise that every size combination is available. Supply route, final tolerances and documentation must be agreed for the selected configuration. Refer to the detail panels below for inherited tolerance and TZM reference values.
The following schedule is retained from the existing catalogue. It is not a confirmed drawing tolerance or an inspection result; each dimensional band must be reviewed for the ordered tube.
Product | Outer Diameter (mm) | Wall Thickness (mm) | Length (mm) | |||
|---|---|---|---|---|---|---|
Size | Tolerance | Size | Tolerance | Size | Tolerance | |
Molybdenum Tube/Pipe | <100 | ±1.0 | <1 | ±0.1 | <100~150 | ±2.0 |
100~200 | ±2.0 | 1~3 | ±0.25 | 150~350 | ±3.0 | |
200~300 | ±3.0 | 3~10 | ±0.5 | 350~650 | ±4.0 | |
300~400 | ±5.0 | 10~20 | ±1.0 | 650 ~ 2000 | ±5.0 | |
>400 | ±7.0 | 20 ~ 30 max | ±1.0 | 2000 ~ 6000 max | ±5.0 | |
The original first length-band label is “<100~150”. Its meaning must be clarified in the quotation. OD, wall and length bands are independent; a horizontal row does not establish a feasible size combination.
These inherited catalogue values lack test temperature, material condition, orientation and test-method details. They are retained for enquiry context only and must not be treated as batch measurements or guaranteed acceptance values. Agree the applicable condition, methods and documentation before ordering.
| Catalogue reference | Existing published value |
|---|---|
| Density | ≥10.05 g/cm³ |
| Tensile strength | ≥735 MPa |
| Yield strength | ≥685 MPa |
| Elongation | ≥10% |
| Hardness | HV240–280 |
The old catalogue cites ASTM B386 and, for Mo-La, ASTM B387. B386 covers plate, sheet, strip, foil and ribbon; B387 covers bar, rod and wire. These references alone do not establish compliance of a finished tube or capillary. Specify the applicable material requirements, ordered edition, drawing and tube acceptance criteria.
The existing page also lists seamless and welded supply and describes some options as “sintered to be unibody, no bonding”. These are configuration-specific descriptions, not one manufacturing route for every size. Confirm the required route and joint restrictions during quotation.
Identify OD, ID or wall thickness, length, end condition, concentricity, straightness and surface requirements on the drawing. A minimum OD and minimum wall listed separately do not establish the same part.
Include temperature, atmosphere, pressure, loading and thermal cycle. Molybdenum’s high melting point does not define a safe operating temperature or make it oxidation resistant in air. Pressure-containing or other regulated service needs a separate engineering and acceptance review.
The current product selector distinguishes listed pure-molybdenum and TZM sizes. Review its option details and price, or send a drawing for another configuration. A purity value in the inherited product name does not define TZM alloy chemistry.
For furnace, glass-processing, vacuum-device or thermocouple-support components, provide the actual thermal cycle, atmosphere, mating geometry and cleanliness requirements. Material choice and component suitability depend on those conditions.
Confirm tube identification, end protection, packing length, handling and documentation requirements with the order. The photographs below are existing packaging examples; they do not establish the packing method for every tube geometry.
No. Pure molybdenum purity and TZM alloy chemistry are different requirements. State the chosen material, chemical limits, condition and required documents. Mo-La also requires its own composition and condition.
The ranges are catalogue envelopes. Confirm the actual OD, ID or wall, length, tolerance and condition together. Do not combine independent minimum and maximum values into an assumed available part.
The existing catalogue lists different route descriptions for different options. Provide the required route, any joint restrictions and the drawing. The quotation must confirm the proposed route for that configuration.
Those references cover flat products and bar/rod/wire respectively. They do not, by themselves, establish a finished tube specification. Agree applicable material requirements, dimensions, inspection and acceptance criteria for the order.
Include material grade and condition, OD and ID or wall, length, quantity, tolerances, bore and outer-surface finish, end details, operating environment, drawing revision, documentation and delivery destination.
Review Mo, Mo-1, Mo-2, TZM and Mo-La terminology before defining the material and condition for your tube enquiry.
See the existing tube and capillary product video, then provide the bore geometry, length and selected material for review.
Send the material grade, OD and ID or wall, length, quantity, tolerances and drawing. Add surface, operating conditions, inspection and documentation requirements where relevant.