01 / POWDERPowder Raw Materials
Tungsten and binder-phase composition requirements are confirmed according to the target material system and specification.
Home › Products & Applications › 高比重鎢合金
TUNGSTEN HEAVY ALLOY
Tungsten Heavy Alloy
Tungsten Heavy Alloy Machining | W-Ni-Fe · W-Ni-Cu Materials
MAOXU supplies tungsten heavy alloy materials and evaluates custom components in W-Ni-Fe and W-Ni-Cu systems. Based on drawings, density, dimensions, tolerances and application, we can evaluate an integrated route from raw material, pressing and sintering to inspection and CNC precision machining.
W-Ni-FeW-Ni-CuPressed & SinteredCNC MachiningMaterial Certificate
MATERIALS & PROCESS
Integrated Evaluation from Material to Finished Component
Material system, forming method, sintering conditions, machining accuracy and inspection documents are confirmed according to project requirements.
02 / PRESSINGPressing
Pressing and blank routes are evaluated according to component dimensions and process conditions.
03 / SINTERINGSintering
Sintering and downstream processing are evaluated according to grade and project requirements.
04 / CNCCNC Precision Machining
Precision machining feasibility is evaluated against drawings, tolerances and surface requirements.
05 / INSPECTIONInspection & Documentation
Dimensions, material certificates and specified inspection documents are confirmed according to order requirements.
ALLOY SYSTEMS
W-Ni-Fe & W-Ni-Cu Alloy Systems
Both are common tungsten heavy alloy systems. Final material selection should be confirmed according to density, mechanical properties, service environment, machining requirements and customer specifications.
W-Ni-Fe| W-Ni-Fe
Suitable for a wide range of high-density counterweights, balancing parts and precision industrial components.
- Material specifications are confirmed by grade and project.
- Blanks, semi-finished parts and precision-machined parts can be evaluated.
- Actual properties are governed by material certificates and customer specifications.
W-Ni-Cu| W-Ni-Cu
Material selection and manufacturing can be evaluated for specific applications, non-magnetic requirements or customer material specifications.
- Composition and density are confirmed according to project specifications.
- Pressed & sintered parts can be evaluated from drawings.
- CNC machining and inspection documentation can be integrated.
Different specifications may set different requirements for tungsten content, density, mechanical properties, heat treatment and acceptance methods. Complete drawings, material specifications and inspection requirements should be confirmed before production.
PRECISION MACHINING
Machining & Finishing of Tungsten Heavy Alloys to Tight Tolerances
High-density W-Ni-Fe and W-Ni-Cu parts often require the machining route to be considered together with the sintered blank. MAOXU evaluates blank size, machining allowance, geometry, tolerance, surface finish and inspection requirements from the customer drawing before the manufacturing route is confirmed.
Turning & Milling | Geometry
CNC turning and milling can be evaluated for custom tungsten heavy alloy components. Part geometry, section thickness, workholding and machining allowance are reviewed together with the selected alloy and sintered blank.
- Custom dimensions and drawing-based parts
- Machining allowance coordinated with the blank
- Process route evaluated before quotation
Grinding & Finishing | Accuracy
Where tighter dimensional control or surface requirements are specified, grinding and finishing operations can be incorporated after primary machining. The practical route depends on part geometry, tolerance and acceptance criteria.
- Tight-tolerance features evaluated by drawing
- Surface finish requirements reviewed before production
- Final dimensions coordinated with inspection method
Inspection | Acceptance
Dimensional inspection and material documentation can be defined according to the project. Critical dimensions, tolerances and requested inspection records should be identified before production.
- Critical dimensions and tolerances
- Material certificate requirements
- Project-specific inspection documentation
Build to Drawing | RFQ
For custom machined tungsten heavy alloy parts, send the drawing together with material grade or density, quantity, tolerance and surface requirements. MAOXU will evaluate a suitable material-to-finished-part manufacturing route.
- W-Ni-Fe and W-Ni-Cu systems
- Blank, semi-finished or finished components
- Prototype and production quantities evaluated by project
Tungsten heavy alloy machining should be evaluated as part of the complete manufacturing route rather than as a separate final operation. Actual achievable tolerances and surface finish depend on alloy, part size, geometry, process sequence and inspection requirements.
ASTM B777 Tungsten Heavy Alloy Technical Specifications
Material classes, density, hardness and mechanical-property references for W-Ni-Fe / W-Ni-Cu. Verify all figures against the applicable standard, material certificates and purchase specifications before acceptance.
ASTM B777 — Classification, Density and Hardness
| 項目 / Property | 單位 | Class 1 | Class 2 | Class 3 | Class 4 |
|---|---|---|---|---|---|
| 名義鎢含量 / Nominal W | wt.% | 90 | 92.5 | 95 | 97 |
| 密度 / Density | g/cm³ | 16.85–17.30 | 17.15–17.85 | 17.75–18.35 | 18.25–18.85 |
| 最高硬度（燒結或退火態）/ HRC max | HRC | 32 | 33 | 34 | 35 |
依 ASTM B777-15 Table 1；2026 版為再確認版本。硬度上限適用未加工硬化的燒結或退火狀態。
ASTM B777 — Minimum Mechanical Properties by Alloy System
| 系統 / Class | 抗拉強度 min (MPa) | 0.2% 降伏強度 min (MPa) | 延伸率 min |
|---|---|---|---|
| W-Ni-Fe · Class 1 | 758 | 517 | 5% |
| W-Ni-Fe · Class 2 | 758 | 517 | 5% |
| W-Ni-Fe · Class 3 | 724 | 517 | 3% |
| W-Ni-Fe · Class 4 | 689 | 517 | 2% |
| W-Ni-Cu · Class 1 | 648 | 517 | 2% |
| W-Ni-Cu · Class 2 | 648 | 517 | 2% |
| W-Ni-Cu · Class 3 | 648 | 517 | 1% |
| W-Ni-Cu · Class 4 | 不適用非磁性 Class 4 | ||
數值為 ASTM B777 Table 2 常見英制最低要求換算之約值，正式合約驗收請依所購標準原文及批次材證。W-Ni-Cu 為常見非磁性系統，但磁性規格仍須以實測及訂單要求為準。
Typical Chemical Composition (Reference Only)
| 元素 / Element | Class 1 | Class 2 | Class 3 | Class 4 |
|---|---|---|---|---|
| 鎢 / W (wt.%) | 90 | 92.5 | 95 | 97 |
| 鎳 / Ni（示例） | 7.1 | 5.4 | 3.6 | 2.1 |
| 鐵 Fe 或銅 Cu（示例） | 2.9 | 2.1 | 1.4 | 0.9 |
此為示意性配方，並非 ASTM B777 指定 Ni/Fe/Cu 比例，亦不代表兩種系統可直接以相同比例替換。Class 4 非磁性系統不在 ASTM B777 規定範圍內；實際配方以供應商確認及材質證明為準。
Note: Typical compositions are not fixed ASTM recipes. W-Ni-Fe and W-Ni-Cu properties are not interchangeable. Validate all figures against the official ASTM standard and supplier certificates before contractual use.
Request Technical Review & QuotationAPPLICATIONS
Main Applications
High density, compact volume and precision machinability make tungsten heavy alloy suitable for many engineering applications.
Aerospace Counterweights
Balancing and weight distribution for aircraft, rotating systems and space-constrained designs.
Radiation Shielding
X-ray and gamma-ray shielding components can be evaluated according to equipment design requirements.
Industrial Applications
High-density counterweights, balancing parts and precision mechanical components.
Precision Machinery
High-precision, high-density custom parts machined to drawing.
Equipment Components
Fixtures, counterweights and precision parts are evaluated against actual equipment conditions.
MAOXU CAPABILITY
Project Integration Capability
01
Material SelectionMaterial system is confirmed according to customer specifications, application, density and machining conditions.
02
Build to DrawingManufacturability is evaluated against drawing dimensions, tolerances, quantity and service conditions.
03
Precision MachiningBlank, sintering and CNC precision-machining requirements are integrated.
04
Material DocumentationMaterial certificates and inspection items are confirmed according to project and order requirements.
FAQ
Tungsten Heavy Alloy FAQ
Is tungsten heavy alloy the same as cemented carbide?
No. Tungsten heavy alloy is primarily selected for its high density, while cemented carbide is primarily selected for high hardness and wear resistance. The terms are sometimes mixed in market searches, so the actual application should be confirmed first.
Can the process be evaluated from pressing and sintering through CNC finished parts?
An integrated process can be evaluated based on complete material specifications, drawings, quantity, tolerances and inspection requirements. Actual manufacturing scope is subject to project confirmation.
Can material certificates be provided?
Material certificates, dimensional inspection and other specified documents can be confirmed according to project requirements. Acceptance items under different specifications should be agreed before quotation and production.
Need a Tungsten Heavy Alloy Component Solution?
Send us your drawings, material specification, quantity and acceptance requirements, and MAOXU will help evaluate the material and manufacturing route.