Pure Tungsten Nozzle（W1 Grade）

Introduction

Pure tungsten nozzle is a high-temperature precision refractory component manufactured from high-purity tungsten powder through isostatic pressing, high-temperature vacuum sintering, forging and multi-axis CNC precision machining. Tungsten has the highest melting point among all metals, featuring outstanding high-temperature resistance, ultra-low vapor pressure, low thermal expansion coefficient and excellent thermal conductivity. Our pure tungsten nozzles have dense grain structure, no internal pores or cracks, and maintain stable geometry and mechanical properties under extreme high temperature, high-speed gas/liquid flow and vacuum working conditions. Strictly controlled orifice tolerance ensures stable flow, uniform jet and long service life for high-temperature thermal spraying, plasma, aerospace and semiconductor industries.

Core Advantages

1. Ultra-high temperature resistance
Melting point at 3422°C. It can continuously work under 2000°C~3000°C in oxygen-free environment without softening, deformation or nozzle hole distortion, far better than ceramics, copper and other refractory metal nozzles.

2. Controlled high purity & precise chemical composition
Made from ultra-pure tungsten powder and optimized sintering process. Strict trace impurity control:
C＜0.0030 wt%, O＜0.0050 wt%, N＜0.0020 wt%, Al＜0.0020 wt%, Mg＜0.0010 wt%, Ca＜0.0020 wt%, Si＜0.0020 wt%, W as balance, total purity ≥99.95%.
Ultra-low impurities prevent contamination of high-purity gas/stream and guarantee stable performance under long-term high-temperature service.

3. Precision machining & dense microstructure
Professional forging and precision EDM / CNC grinding process, density 19.1±0.15g/cm³, no internal pores or inclusions. Orifice and outer profile are machined to tight tolerance following GB/T 1804, ensuring consistent jet shape and flow rate.

4. Excellent vacuum performance
Extremely low vapor pressure under vacuum, no volatilization or contamination at high temperature. Perfect for vacuum coating and vacuum thermal processing systems.

5. High erosion & thermal shock resistance
High rigidity and hardness, strong resistance against high-speed hot gas scouring and thermal cycling shock. Less wear of the inner bore, greatly reducing replacement frequency and production downtime.

6. Customization available
Custom inner orifice diameter, outer diameter, total length, thread structure, inlet/outlet taper angle and special flow channel design. Custom surface treatment options to match different application demands.

Specifications & Surface Options

• Orifice size: Custom micro hole to large bore, minimum tiny orifice available upon drawing

• Dimension: Custom OD, ID, length, thread and special profile (flange, stepped shaft, tapered tip as shown in picture)

• Surface finish:

￮ Black sintered: cost-effective, oxide layer retained, for general high-temperature gas guiding

￮ Ground: smooth surface with oxide skin removed, good dimensional accuracy, standard for most nozzle applications

￮ Polished mirror: bright, burr-free, high finish inner bore, for high-precision semiconductor and high-purity gas delivery

Applications of tungsten nozzle

• Thermal Spraying & Plasma Industry
Pure tungsten nozzles are widely used as plasma jet nozzles, thermal spray gun nozzles and high-temperature gas guiding nozzles. They withstand continuous high-temperature plasma flow and high-speed particle scouring, keep the jet stream stable and focused, improve coating uniformity and extend service life of spraying equipment.

• Aerospace & High-temperature Gas Dynamics
Applied as test bench nozzles, high-temperature gas jet orifices and combustion chamber auxiliary nozzles for aerospace thermal simulation testing. Low thermal expansion ensures the nozzle geometry does not deform under rapid temperature rise, guaranteeing accurate gas flow parameters in extreme thermal environment.

• Semiconductor & Vacuum Coating Industry
Used for high-purity gas injection nozzles, evaporation source nozzles and vacuum thin film deposition gas distribution components. High purity avoids wafer contamination, ultra-low vapor pressure keeps the vacuum chamber clean during high-temperature working.

• Metallurgy & Material Research
Serve as gas injection nozzles for high-temperature melting furnaces, gas atomization nozzles for metal powder production and high-temperature gas flow control orifices in material sintering furnaces. Resist thermal shock and high-temperature corrosion in molten metal and high-temperature gas environments.

• Laser & Additive Manufacturing
Custom micro pure tungsten nozzles for high-temperature powder feeding and gas shielding in metal 3D printing. Stable bore size under heat load ensures consistent powder feeding and uniform shielding gas flow.

• Laboratory & Scientific Research
Custom precision tungsten nozzles for high-temperature gas dynamics testing, vacuum jet experiment fixtures and thermal simulation test benches in university and research institutes. Stable orifice dimension for repeated high-temperature cycle experiments.

Quality & Service

All pure tungsten nozzles are produced strictly to ASTM B760 and GB/T4181. Full inspection from raw material to finished goods. COA and EN10204 certificates are available per batch.
We support sample testing, stable batch quality, fast lead time and worldwide shipment. Custom CNC / EDM machining service is offered to solve your unique material challenges.

Our Strengths | Certification, Machining & Packaging Capacity

1. Authoritative Certifications & Industry Standards

Our company has passed ISO9001, ISO45001, ISO18001, ISO13485 system certifications, and all products comply with RoHS, REACH environmental standards. We strictly follow international and industrial specifications including Mil-T-21014, ASTM B777-99 and GB series standards for production and quality control.

We provide complete quality documents: Quality Inspection Report, EN10204 3.1 Inspection Certificate, COC, CO, COA. Third-party material inspection certificates are supported, and we can conduct customized testing according to customers’ special technical requirements.

2. Advanced Machining Equipment & Precision Testing System

Machining Equipment: Equipped with complete precision processing equipment, including CNC Lathe, Digital Controlled Lathe, Machining Center, Drilling Center, CNC Planar Grinding Machine and Surface Grinder, to realize high-precision cutting, grinding, drilling and forming processing.

Testing Equipment: Adopts professional detection devices such as 2D Measuring Instrument, 3D Measuring Instrument, Coordinate Measuring Machine (CMM) and Density Detector to ensure accurate product size, stable density and consistent batch quality.

Tolerance Execution Standard: All machined parts are strictly controlled in accordance with GB/T 1804 national tolerance standard to meet high-precision assembly requirements.

3. Custom Service & Professional Packaging Solution

We provide one-stop non-standard customization service. According to customers’ drawings and technical parameters, we can customize special-sized tungsten materials and finished machining parts. We commit to providing professional high-density material solutions and customized tungsten alloy products for global clients.

Multiple safe and export-grade packaging options are available: heavy-duty export cartons (max load 20kg per carton), solid wooden boxes, iron drums and vacuum packaging. Custom packaging solutions can be tailored according to customer’s shipping and storage demands.