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High Density Tungsten Alloy Radiation Shielding Parts Custom Machining
| Payment Type: | T/T |
| Incoterm: | CIF,FOB,Express Delivery,EXW,FCA |
| Min. Order: | 2pcs |
| Transportation: | Ocean,Air,Express |
Attributes
Model No.: JDTG-CM-064
Brand: ZZJD
Place Of Origin: China
Size: Custom-made
Material: 95% Tungsten
Denstiy: 18.1g/cm3
Surface: Polished
PACKAGING & DELIVERY
Selling Units : PCS
Package Type : Standard export packing
DESCRIPTION
High density tungsten alloy (W‑Ni‑Fe/W‑Ni‑Cu, 90%‑97% W) is the first choice for radiation shielding parts (X/γ‑ray) due to its non‑toxicity, compact size, and superior attenuation over lead; Zhuzhou Jiuding provides end‑to‑end custom machining with full quality control, tailored for medical imaging, nuclear instrumentation, and industrial NDT. Below is a detailed, actionable guide.
Custom Machining Process Flow & Capabilities
Powder Metallurgy Base Fabrication
Powder mixing: Tungsten powder (purity ≥99.95%) + binder (Ni/Fe/Cu), O₂ ≤50ppm, uniformity deviation ≤1%.
Forming: Die pressing (standard blocks/bars, tolerance ±0.1mm); cold isostatic pressing (CIP, 200‑300MPa) for complex profiles; MIM for micro‑parts (≤50g).
Sintering: Hydrogen/vacuum sintering at 1350‑1500℃, theoretical density ≥99.5%, grain size controlled at 10‑30μm.
Precision Machining & Finishing
CNC turning/milling: Tolerance ±0.02‑±0.05mm, Ra ≤0.8μm, ideal for collimators and shielding enclosures.
Grinding: Ra ≤0.2μm for sealing surfaces or mating parts.
Surface treatment: Passivation (corrosion resistance), Ni‑plating (wear resistance), anodizing (insulation), cost +50‑150 RMB/piece.
Process‑Cost Coefficients
|
Process |
Coefficient |
Applicable Parts |
Lead Time |
|
Die pressing + sintering |
1.0 |
Standard shapes |
15 20 days (bulk ≥50kg) |
|
CIP + sintering |
1.15~1.3 |
Complex profiles |
20 25 days |
|
MIM |
1.3~1.5 |
Micro-parts |
10 15 days (small batch) |
|
Precision CNC |
1.2 1.4 |
Tolerance ±0.02~±0.05mm |
+3 5 days |
Quality Assurance & Testing Protocol
|
Stage |
Test Items |
Equipment |
Acceptance Criteria |
|
Incoming |
W powder purity/particle size, binder composition |
ICP, laser particle size analyzer |
W purity ≥99.95%, impurities ≤0.05% |
|
Sintering |
Density, microstructure, tensile strength |
Densimeter, metallographic microscope, universal testing machine |
Density ≥99.5% of theoretical value, uniform grains |
|
Machining |
Dimensional accuracy, surface roughness |
CMM, roughness tester |
As per drawing (±0.02mm typical) |
|
Final |
Radiation attenuation, NDT, dimensional |
Gamma spectrometer, ultrasonic flaw detector |
Attenuation meets design; no internal defects |
Customization Workflow & Lead Time
Customer provides 2D/3D drawings + specs: Alloy grade, density, shielding thickness, tolerance (critical!), surface finish, quantity, lead time.
Jiuding delivers material recommendation, process plan, and formal quote within 3 hours.
Sampling: ≤5kg, 3‑5 days delivery, sample cost 1.5‑2.0× base price (deductible for bulk orders ≥50kg).
Mass production: Small batch (5‑50kg) 7‑10 days; bulk (≥50kg) 15‑20 days; urgent orders available with 10%‑20% premium.
Payment: 30% advance, 70% balance before shipment (with inspection report).
Application‑Specific Optimization
Medical Imaging (CT/PET‑CT): 95W/97W W‑Ni‑Fe, collimator with ±0.02mm tolerance, 100% CMM inspection + attenuation testing.
Nuclear Instruments: W‑Ni‑Cu 95W (non‑magnetic), CIP + CNC for complex enclosures, ultrasonic NDT mandatory.
Industrial NDT: 90W W‑Ni‑Fe, die pressing + sintering for cost efficiency, surface passivation for corrosion resistance.
Key Advantages vs. Alternatives
vs. Lead: Non‑toxic, 30%‑50% smaller volume for same shielding effect, higher mechanical strength, no disposal risks.
vs. Pure Tungsten: Lower cost, better machinability, no brittleness issues, easier to fabricate complex parts.
vs. Jiuding offers full‑process quality control, faster customization response, and stable bulk supply (pass rate ≥99.5%).
