PURE TUNGSTEN MILL PRODUCTS & ENGINEERED PARTS
Pure Tungsten
Technical sourcing for tungsten wire, rod, foil, sheet, plate and parts to drawing.
MNK-G.S.A sources pure tungsten by required purity, governing specification, production route, product form, dimensions, condition, surface finish, inspection documents and destination.
Product Form Determines the Applicable Standard
Pure tungsten wire, rod, flat products and finished components do not share one universal product specification. ASTM B760 applies to wrought unalloyed flat products, while ASTM F288 has a defined wire, rod and electronic-device scope. The requested form and end use are checked before a standard is assigned.
Material Definition and Supply Scope
Fine Wire
Drawn wire for electronic, heating, research and specialized applications, sourced by purity, diameter or weight-per-length, tensile range, finish and spool.
Heavy Wire
Larger wire and straightened lengths sourced by diameter, mechanical condition, straightness, surface and packaging requirements.
Rod and Bar
Pressed, sintered, swaged and optionally ground long products supplied in random or cut lengths with application-specific finish.
Foil and Sheet
Rolled flat products sourced by thickness, width, length, condition, surface finish, grain direction and inspection.
Plate
Hot-rolled or otherwise processed plate sourced by complete format, condition, surface and machining allowance.
Custom Parts
Machined and fabricated components reviewed against starting stock, drawing, tolerances, surface, inspection and operating environment.
Published size examples by source
These are source-specific catalogue examples, not global minimum and maximum limits, MNK stock or a promise of current availability. Confirm the complete dimensions, material condition, quantity and inspection requirements before ordering.
| Product Form | Source-specific example | Notes |
|---|---|---|
| Wire | Goodfellow clean pure-W wire example: Ø0.05 mm, 99.95 % W | A named supplier item, not a universal wire range. Confirm the ordered length, condition, surface and applicable specification. |
| Micro / EDM Rod | Dimensions to drawing; source confirmation required | Review diameter, length, straightness and end condition together. Do not transfer wire-spool or general rod limits to micro-rods. |
| General Rod / Bar | Elmet swaged rod: Ø0.02–1 in (0.508–25.4 mm) | Random or cut lengths; the cited page does not establish a universal maximum length. Confirm the exact diameter/length pair and finish. |
| Foil / Sheet / Plate | Elmet foil, sheet and plate: separate thickness categories below | Thickness categories do not establish maximum width or length. Confirm the complete format and condition with the selected source. |
| Custom Parts | According to drawing | Manufacturing feasibility is confirmed individually. |
Do not imply that all diameters are available at the longest published length.
Actual availability depends on grade, specification, quantity, tolerances, certification requirements and manufacturing source. Diameter, thickness, width and length must be confirmed as one complete combination.
Traceable product-form examples
Goodfellow and Elmet provide the following specific examples. Dimensions in inches are retained from Elmet; metric values use 25.4 mm per inch. No width, length, stock or full ASTM conformity is inferred from a thickness or diameter alone.
| Product Programme | Published Size Benchmark | Ordering Context |
|---|---|---|
| Goodfellow: clean pure-W wire | Ø0.05 mm; 99.95 % W | Supplier’s “Grade 1” spooled-wire item; this supplier label is not automatic certification to an ASTM grade. |
| Elmet: foil | 0.0016–0.0049 in (0.04064–0.12446 mm) thick | Confirm width, length, flatness, surface and condition; not a complete sheet-format specification. |
| Elmet: sheet | 0.005–0.187 in (0.127–4.7498 mm) thick | A supplier thickness category, not guaranteed width and length at both endpoints. |
| Elmet: plate | 0.1875–1.575 in (4.7625–40.005 mm) thick | Confirm the full format, material condition, inspection and machining allowance. |
| Elmet: swaged pure-W rod | Ø0.02–1 in (0.508–25.4 mm) | Random or cut lengths; surface finish is selected separately. No general 3000 mm limit is stated in the cited programme. |
| Other wire programmes: conflicting source labels | Request a current, material-specific datasheet | Elmet’s dedicated pure-W page and combined W/Mo page assign identical support/redraw/heating rows to different materials. Those disputed ranges are not used here as confirmed pure-W limits. |
Do not combine separate product programmes into one guaranteed envelope. State the complete diameter or thickness, width, length, surface, condition, tolerances and quantity. Source links and limitations are provided below.
Standards and Documentation
ASTM B760-07(2023)
ASTM B760-07(2023) covers wrought unalloyed tungsten plate, sheet and foil. Inch-pound values are normative; the stated SI values are informational. It does not cover wire or rod, and a supplier size listing alone does not demonstrate conformity.
ASTM F288-96(2025)
Current specification covering defined drawn tungsten wire types for electron tubes, lamps and other devices, plus one rod type for metal-to-glass sealing.
Scope Limitation
ASTM F288 is not a universal specification for every pure tungsten rod or general engineering component; ASTM B760 does not cover wire or rod.
Manufacturer Purity
Elmet’s legacy product sheet, printed revision rv-10/05, states ≥99.95 % W excluding gases. Its chemistry is evaluated on the powder lot; finished-part chemical and mechanical testing is not routinely performed to ASTM according to that document. This historical reference is not proof of current finished-part certification. Specify and confirm the actual inspection certificate for the order.
EN 10204:2004
European inspection-document type may be specified where the manufacturer can support the agreed chemistry, dimensions, properties and traceability.
No Automatic EN / DIN Equivalent
No generic EN or DIN designation is assumed equivalent to ASTM B760 or F288. Any European requirement is reviewed by exact document number and product scope.
Reference Physical and Mechanical Properties
Reference Basis
The following reference values come from Plansee’s tungsten key-facts table, checked 23 September 2026; no revision date shown. They are not lot acceptance criteria. Processing, condition and temperature must be matched to the application.
Density and Melting Point
Density at 20 °C: 19.25 g/cm³ W; Plansee SE. Tungsten at 20 °C. Plansee reference, not a batch or finished-part acceptance limit. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten: density at 20 C). Reviewed: 2026-09-23.
Melting point: 3420 °C W; Plansee SE. Manufacturer reference for pure tungsten; not a permitted service-temperature limit or a batch acceptance criterion. No document revision date shown. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten table / Melting point). Reviewed: 2026-09-23.
Heat Capacity and Conductivity
Specific heat at 20 °C: 130 J/(kg·K) W; Plansee SE. Pure tungsten at 20 °C. Source 0.13 J/(g·K) converted to 130 J/(kg·K). Reference value, not a batch acceptance limit; do not use unchanged for a hot-zone calculation. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten table / Specific heat at 20 C). Reviewed: 2026-09-23.
Thermal conductivity at 20 °C: 164 W/(m·K) W; Plansee SE. Tungsten at 20 °C. Plansee reference, not a batch acceptance limit. Do not extrapolate to hot-zone temperatures. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten: thermal conductivity at 20 C). Reviewed: 2026-09-23.
Thermal Expansion
Linear thermal expansion at 20 °C: 4.4 ×10⁻⁶/K W; Plansee SE. Tungsten at 20 °C. Plansee reference at the stated temperature, not an interval mean or batch acceptance limit. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten: thermal expansion at 20 C). Reviewed: 2026-09-23.
Electrical Resistivity
Electrical resistivity at 20 °C: 5.5 μΩ·cm W; Plansee SE. Pure tungsten at 20 °C. Source 0.055 Ω·mm²/m converted to 5.5 μΩ·cm. Reference value, not a batch acceptance limit; use temperature-dependent data for other temperatures. Source: Plansee - Key facts about tungsten (No edition date shown; checked 2026-09-23, p. Facts about tungsten table / Specific electrical resistance at 20 C). Reviewed: 2026-09-23.
Elastic Modulus
Plansee presents Young’s modulus as a temperature-dependent curve on its properties page. Select data for the required temperature, condition and orientation; this page does not assign a universal guaranteed modulus to every finished product.
Application Context
High-Temperature Furnaces
Heating elements, shields, supports, boats and components developed around operating temperature, atmosphere, load and thermal cycling.
Electronics and Devices
Wire, seal rod, contacts and other components sourced under the applicable device, material and dimensional requirements.
Research and Custom Engineering
Mill products and drawing-based parts for vacuum, thermal, laboratory and specialized industrial systems.
Capability Note
Physical properties do not establish manufacturing limits. Keep pure tungsten separate from tungsten heavy alloys and cemented carbide; their composition, processing, properties and achievable dimensions differ.
Relevant ASTM Tungsten References
Use the relevant ASTM reference together with the customer specification, drawing, required product form and inspection route. The standard number alone does not establish grade equivalence, stock availability, conformity or fitness for service.
Specialized ASTM Wire References
Use the relevant ASTM wire reference together with the customer specification, drawing, required product form and inspection route. The standard number alone does not establish grade equivalence, stock availability, conformity or fitness for service.
Send Your Pure Tungsten Inquiry
Provide the material grade or composition, governing specification, product form, complete dimensions, quantity, inspection-document requirements and delivery destination.
Sources, dates and limits
Sources checked on 15 September 2026. This is the review date, not the publication date of every document. Public references support technical discussion; they do not establish a partnership, stock, delivery promise or certification of an ordered part.
- Plansee: tungsten key facts
Basis for density, melting point, heat capacity, conductivity, thermal expansion and resistivity above. No revision date shown; the cited temperatures are part of the data.
- Plansee: temperature-dependent tungsten properties
The Young’s-modulus curve is temperature-dependent. No exact universal design modulus is inferred from the curve. No revision date shown.
- Goodfellow: clean pure-W spooled wire
Specific Ø0.05 mm, 99.95 % W example. Supplier “Grade 1” is retained as a catalogue label only. No revision date shown.
- Elmet: tungsten rod programme
Swaged rod diameter range and random/cut-length supply. No universal maximum length is stated; no revision date shown.
- Elmet: foil, sheet and plate thickness categories
Original inch ranges are retained; metric conversion is shown separately. Width and length require confirmation. No revision date shown.
- Elmet: dedicated pure-W wire page, conflicting labels
Its support/redraw/heating rows conflict with the material labels on the combined W/Mo page linked next. The disputed ranges are not accepted here as confirmed pure-W capability.
- Elmet: combined W/Mo wire page for comparison
Checked against the dedicated page; no revision date shown. Obtain a current material-specific datasheet before quoting the disputed programmes.
- Elmet: legacy W product sheet, printed rv-10/05 (PDF)
The file name includes 2017, but the printed revision is October 2005. Purity excludes gases and chemistry is powder-lot based. Old standard references and this sheet are not proof of current finished-part conformity.
- ASTM B760-07(2023): official scope
Unalloyed wrought plate, sheet and foil; inch-pound values are normative, SI values informational. The public page is not the full standard text.
- ASTM official nonferrous-standards register
Used to distinguish editions, including the 2025 reapprovals of the relevant electronic-wire standards. The applicable full specification and inspection requirements must be agreed for the order.