TUNGSTEN HEAVY ALLOYS & HIGH-DENSITY COMPONENTS
WNiFe & WNiCu Tungsten Heavy Alloys
ASTM B777 class-based sourcing for high-density tungsten-alloy material, blanks and precision components.
MNK-G.S.A sources tungsten heavy alloy by ASTM class where applicable, binder system, density, magnetic requirement, product form, dimensions, drawing, inspection and destination.
Class, Binder System and Part Requirements Must Be Aligned
Tungsten heavy alloys are mainly tungsten with a metallic binder system, commonly nickel–iron or nickel–copper. ASTM B777 defines four machinable high-density classes, but class alone does not replace the need to specify binder, magnetic behavior, geometry and part-specific inspection.
Material Definition and Supply Scope
ASTM B777 Class 1
Lowest-density class within the four-class ASTM system. Manufacturer product families commonly begin around nominal 90 wt.% tungsten.
ASTM B777 Class 2
Higher-density class often represented by manufacturer grades around nominal 92.5 wt.% tungsten, subject to certificate and binder verification.
ASTM B777 Class 3
Higher tungsten-content class used where density and attenuation requirements justify the accompanying change in ductility and processing.
ASTM B777 Class 4
Highest-density class in ASTM B777. The current standard notes that Class 4 is not available as a non-magnetic grade.
WNiFe
Nickel–iron binder systems are sourced by class, composition, density, mechanical properties, magnetic behavior and part requirements.
WNiCu / Low-Magnetic Options
Nickel–copper or other low-magnetic heavy-alloy routes require explicit permeability limits and cannot be inferred solely from tungsten content.
Typical Global Manufacturing Capability
Swaged Rod
One specialist source publishes approximately 6.35–25.4 mm diameter with lengths up to about 1,219 mm. Common length depends on diameter, class and finish.
Sintered Rod
Published standard examples include approximately 12.7–25.4 mm diameter and lengths up to about 610 mm; special-mould routes may extend to about 101.6 mm diameter.
Rolled Plate and Sheet
Published examples include sheet from about 2.03 mm and hot-rolled plate through about 25.4 mm, with selected width and length formats up to about 610 mm.
Blocks
Sintered blocks and custom moulds are available in a range of cross-sections. Maximum dimensions and length are limited by class, weight, tooling and furnace capacity.
Discs, Spheres and Blanks
Standard and custom discs, spheres, cubes, rings and near-net blanks are sourced by class, geometry, machining allowance and inspection.
Finished Components
Machined weights, shields, collimators, dampers and other parts require drawing review, part-specific tolerances, surface condition and test plan.
Standards and Documentation
ASTM B777-15(2026)
Current specification for four classes of machinable high-density tungsten-base metal made by consolidating powder mixtures. It defines chemistry, physical, mechanical and microstructural requirements.
Coupon vs. Part Properties
ASTM B777 states that lot testing is based on test coupons and that properties can vary with part size and sampling location. Large or critical parts may require additional part-specific testing.
Magnetic Requirement
Where freedom from magnetic response is required, it must be specified in the purchase order. ASTM B777 defines a maximum permeability criterion for non-magnetic material.
EN 10204:2004
Inspection-document type, including 3.1 or 3.2 where available, is stated together with the agreed chemistry, density, mechanical and dimensional results.
No Automatic EN Equivalent
No EN or DIN grade is assumed to be equivalent to an ASTM B777 class. Any requested European specification is checked by exact reference and product scope.
Part-Specific Inspection
For large sections or critical components, mechanical testing from the part, nondestructive examination or an agreed inspection plan can be specified before quotation.
Reference Physical and Mechanical Properties
Reference Basis
A current integrated-manufacturer datasheet publishes typical and minimum values for tungsten heavy-alloy families from nominal 90 to 97 wt.% tungsten. The applicable ASTM class and exact binder remain grade-specific.
Density
Published reference density increases from approximately 17.0 g/cm³ for nominal 90% W families to about 18.5 g/cm³ for a nominal 97% W family.
Strength
The cited grade table lists minimum ultimate tensile strengths of approximately 648–758 MPa across the published families. Additional rolling, swaging or heat treatment can materially change strength and ductility.
Hardness and Ductility
Published maximum hardness values are approximately 32–35 HRC, while minimum elongation depends on grade and magnetic variant. These values cannot be transferred between classes without confirmation.
Magnetic Response
Published conventional and low-magnetic variants use different permeability limits. Class, binder chemistry and measured permeability must be stated; Class 4 is not assumed to be non-magnetic.
Certificate Control
Tungsten content, binder composition, density, tensile properties, hardness, elongation, permeability and part-specific results must be confirmed for the offered grade and manufacturing condition.
Application Context
Balance and Counterweight
Static and dynamic balancing components selected by density, mass distribution, strength, magnetic requirement and geometry.
Radiation Management
Shielding, collimation and attenuation components designed around radiation type, thickness, geometry, joining and regulatory requirements.
Vibration and High-Density Parts
Damping, inertia and other high-density components sourced only after the application load case and part-specific requirements are defined.
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 WNiFe & WNiCu Tungsten Heavy Alloys Inquiry
Provide the material grade or composition, governing specification, product form, complete dimensions, quantity, inspection-document requirements and delivery destination.