LOW-MAGNETIC TUNGSTEN–NICKEL–COPPER MATERIALS
WNiCu Tungsten Heavy Alloy
Composition- and permeability-controlled sourcing for WNiCu semi-finished products and custom parts.
MNK-G.S.A sources tungsten–nickel–copper heavy alloy by exact composition, ASTM class where applicable, density, permeability requirement, product form, dimensions, drawing, inspection documents and destination.
Non-Magnetic Performance Must Be Specified and Tested
WNiCu uses a nickel–copper binder and is selected when low magnetic response is important. A commercial WNiCu name does not guarantee one composition, ASTM class or permeability value; the complete requirement and manufacturer certificate govern acceptance.
Material Definition and Supply Scope
Class 1 WNiCu
An official manufacturer publishes a nominal 90% tungsten, nickel–copper binder grade under ASTM B777 Class 1. Exact binder composition and permeability remain grade-specific.
Class 2 WNiCu
Commercial WNiCu families are available in Class 2 density ranges, subject to explicit chemistry, mechanical and magnetic-property confirmation.
Class 3 WNiCu
European suppliers publish Class 3 WNiCu routes for non-magnetic high-density applications. The exact W/Ni/Cu ratio and certificate control identity.
No Non-Magnetic Class 4 Assumption
ASTM B777 states that Class 4 is not available as a non-magnetic grade. A Class 4 request must not be represented as WNiCu non-magnetic supply.
Semi-Finished Products
Rod, plate, blocks, discs, rings and other blanks are sourced by complete dimensions, condition, machining allowance and inspection.
Finished Components
Non-magnetic counterweights, shields and precision parts require drawing, target density or mass, permeability limit, tolerances and test plan.
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 |
|---|---|---|
| Rod | Ø2–320 mm | Typical length to approximately 600 mm. |
| Plate / Block | 2–200 mm thickness | Typical maximum format approximately 300 × 600 mm. |
| Custom Parts | According to drawing | Composition, magnetic requirement, geometry and inspection govern feasibility. |
WNiCu and WNiFe do not have identical properties. Non-magnetic performance must be specified and tested.
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.
Standards and Documentation
ASTM B777-15(2026)
Applicable when the proposed WNiCu material satisfies the selected class chemistry, density, mechanical and other requirements within the standard scope.
Non-Magnetic Requirement
The purchase order must state the required magnetic permeability and testing. The binder name alone is not an acceptance criterion.
Class 4 Limitation
The current ASTM B777 specification identifies that Class 4 is not available as a non-magnetic grade.
Manufacturer Grade
A European or international trade designation is treated as manufacturer-controlled and is not assumed to equal another source’s WNiCu grade.
EN 10204:2004
Inspection-document type may be requested with chemistry, density, permeability, mechanical, dimensional and traceability results supported by the source.
No Automatic EN / DIN Grade
No generic EN or DIN material designation is declared equivalent to an ASTM B777 WNiCu class without an exact documented reference.
Application Context
Low-Magnetic Counterweights
Dense balance and inertia parts for instruments and assemblies where a numerical magnetic limit is specified.
Medical and Radiation Components
Shielding and collimation parts developed around attenuation geometry, permeability, machining and regulatory controls.
Precision and Research Equipment
High-density non-magnetic components produced to drawing with composition, mass, tolerances and inspection agreed before manufacture.
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.
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.
Send Your WNiCu Tungsten Heavy Alloy Inquiry
Provide the material grade or composition, governing specification, product form, complete dimensions, quantity, inspection-document requirements and delivery destination.