POTASSIUM-DOPED NONSAG TUNGSTEN
Potassium-Doped Tungsten
Manufacturer-controlled sourcing for W-K wire, rod and high-temperature components.
MNK-G.S.A sources potassium-doped tungsten by the exact manufacturer grade, dopant definition, product form, dimensions, condition, inspection documentation and destination.
W-K Is a Manufacturer-Controlled Material Family
Potassium additions are used to develop an elongated, interlocking grain structure after suitable processing and recrystallisation. Manufacturers describe this as nonsag behaviour and improved high-temperature dimensional stability. The shorthand W-K does not establish one universal chemistry, standard or property set.
Material Definition and Supply Scope
W-K Wire
Fine and larger nonsag tungsten wire sourced by manufacturer grade, diameter, condition, finish, mechanical requirements, spool or coil and intended application.
W-K Rod
Potassium-doped tungsten rod supplied in random or cut lengths with cleaned, ground or other manufacturer-available finishes.
Nonsag Tungsten
Manufacturer descriptions such as WK, W-K or WVM are treated as source-specific designations. They are not assumed equivalent without supporting datasheets.
High-Temperature Parts
Heater, support, furnace and other components require review of operating temperature, atmosphere, thermal cycling, geometry and joining method.
Wire-Derived Components
Coils, pins, supports and formed items are assessed against wire grade, diameter, ductility, forming route and final heat exposure.
Custom Manufacturing
Machined or fabricated W-K parts are developed only after starting-stock availability, geometry, tolerances and inspection are confirmed.
Typical Global Sourcing Range
The ranges below represent typical global sourcing and manufacturing capability across specialist sources. They are not MNK stock and do not describe one universal factory envelope.
| Product Form | Typical Global Sourcing Range | Notes |
|---|---|---|
| Wire | See the manufacturer-specific programmes below | There is no single universal W-K range; confirm grade, condition and the complete supply specification. |
| Rod / Cut Lengths | According to manufacturer grade | Diameter, length, straightness and finish are confirmed together. |
| Formed Components | According to drawing | Wire grade, forming route and final heat exposure govern feasibility. |
WVM, W-K and other potassium-doped variants are not one universal chemical grade.
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.
Manufacturer-Specific W–K Wire Envelopes
Published wire programmes show why the manufacturer designation must remain attached to the dimensional range. The examples below describe production capability, not MNK stock and not one interchangeable W–K grade.
| Manufacturer and programme | Published diameter scope | Source and limitations |
|---|---|---|
| Plansee WVM wire | Ø0.05–1.5 mm | Plansee. WVM programme only. Confirm surface and delivery condition. |
| Elmet WK broad production programme | Small-diameter capability: <0.0254 mm; upper programme endpoint: 6.35 mm | Elmet. The first figure is a strict threshold, not a fixed minimum. The broad statement is not a guarantee of every finish or spool combination. |
| Elmet WK finish/spool table | Ø0.0254–2.3622 mm | Elmet. A narrower tabulated programme. Finish, spool type and mass limits vary within this envelope; consult the original table. |
| Rod and wire-derived parts | According to grade and drawing | Elmet. Wire limits do not establish rod or finished-part dimensions. Elmet identifies WK rod separately; confirm the complete rod specification. |
The two Elmet entries describe different published scopes and are intentionally not merged. Metric limits are converted from the stated inch values; the small-diameter threshold is not an exact minimum. WVM, WK, pure W and W-La are not declared interchangeable. Confirm grade, diameter, condition, surface, tolerance, spool or cut length, and the intended thermal duty.
Standards and Documentation
Manufacturer Specification
Potassium-doped tungsten is normally controlled by a manufacturer datasheet or customer specification defining grade, dopant, processing condition and required properties.
No Universal ASTM Grade
ASTM B760 applies to wrought unalloyed tungsten flat products and is not presented as a general W-K wire or rod specification.
WVM Manufacturer Reference
Published manufacturer literature describes WVM as potassium-doped tungsten with a stacked microstructure and improved high-temperature dimensional stability; WVM remains a manufacturer material designation.
WK Manufacturer Reference
Specialist manufacturer literature describes pure and potassium-doped WK rod and W-K nonsag wire, with exact availability tied to the selected product and size.
EN 10204:2004
An inspection-document type may be requested where the manufacturer can support the agreed chemistry, properties, dimensions and traceability.
Equivalence Control
WK, W-K, WVM and other supplier designations are not declared interchangeable without composition, process and property evidence.
Application Context
High-Temperature Furnaces
Wire, elements, supports and components where dimensional stability at temperature is a governing requirement.
Lighting and Electronics
Wire and formed components sourced by exact manufacturer grade, diameter, condition and device specification.
Custom Nonsag Components
Drawing-based parts developed around the approved W-K starting form, process route and inspection plan.
Capability Note
Published dimensional ranges describe demonstrated manufacturing capability across specialist sources, not guaranteed stock and not one universal mill envelope. Diameter, thickness, width, length, condition, tolerance and quantity must be confirmed as one complete combination for each inquiry.
Send Your Potassium-Doped Tungsten Inquiry
Provide the material grade or composition, governing specification, product form, complete dimensions, quantity, inspection-document requirements and delivery destination.
Technical Sources & Revision: W-K
Source review: 15 October 2026. These undated manufacturer pages describe reference programmes, not MNK stock or a common specification.
- Plansee: WVM wire diameter row
- Elmet: broad WK wire programme
- Elmet: WK diameter, finish and spool table
- Plansee: WVM material description
- Elmet: separate WK rod statement
The image path contains a year but gives no verified edition date. WVM and WK are manufacturer-specific designations. The sources do not establish universal equivalence, service-temperature approval or a common rod size range.