W1 Grade Pure Tungsten Electrode for EDM and High-Temperature Applications

Introduction

Pure tungsten electrode (W1 grade) is a high-temperature non-consumable refractory electrode fabricated from high-purity tungsten powder by isostatic pressing, vacuum sintering, forging, drawing and precision grinding. Tungsten has the highest melting point among all metals at 3422°C. This pure tungsten electrode features stable arc performance, low vapor pressure and excellent thermal resistance. It can be custom machined with double-sided sharpened flat tips as shown in the photo, widely used for EDM micro-hole drilling, plasma ionization probes, high-temperature furnace conductive rods and scientific laboratory test fixtures. Our pure tungsten electrodes have dense grain structure without internal pores, stable dimension under high heat and long service life.

Core Advantages

1. Ultra-high melting point & heat resistance
Melting point reaches 3422°C. It can sustain stable operation under high arc temperature without melting or rapid consumption, ideal for EDM discharge and high-temperature plasma environments.

2. High purity & low contamination
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 avoid workpiece contamination during discharge or vacuum processing.

3. Precision grinding & tight dimensional tolerance
Drawn and precision ground rod, density 19.1±0.15g/cm³, no pores or inclusions. Dimensions and tip geometry follow GB/T 1804 tolerance standard. Custom double-end sharpened flat tip, taper tip, flat end or special profiles available.

4. High wear resistance for EDM machining
Hard and rigid tungsten material, less electrode loss during micro-hole EDM drilling, keeps consistent tip shape, improves hole precision and reduces replacement frequency.

5. Low evaporation & vacuum compatibility
Ultra-low vapor pressure at high temperature, minimal material evaporation. Suitable for vacuum and electron beam applications, will not pollute vacuum chamber.

6. Full customization available
Custom diameter, overall length, tip shape (double sharpened flat tip, ball, taper tip, flat end), surface finish and packaging. OEM marking is acceptable.

Specifications & Surface Options

• Diameter: 1.0mm,1.6mm,2.0mm,2.4mm,3.0mm,3.2mm,4.0mm, or custom size

• Length: Standard 150mm /175mm, custom length available

• Tip Style: Double end sharpened flat tip (as shown), ball tip, sharp taper tip, flat end

• Surface finish:

￮ Black sintered: low cost, for general high-temperature industrial electrodes

￮ Ground bright: smooth, precision tolerance, standard for EDM & TIG electrodes

￮ Polished: mirror finish, for vacuum & electron emission applications

Applications

• EDM & Electrical Discharge Machining
Precision pure tungsten pin/electrode for micro-hole EDM drilling. High wear resistance, maintain consistent tip shape during discharge machining, widely used for mold, nozzle and aerospace micro hole processing.

• TIG / GTAW Welding Industry
WP pure tungsten electrode is the classic choice for AC welding of aluminum, magnesium and their alloys. It creates stable AC arc and forms clean balled tip during welding.

• Vacuum Electronics & Electron Beam Equipment
Used as electron emission cathodes, heating electrodes, grid components for vacuum tubes, electron beam guns and vacuum coating systems.

• Plasma & Thermal Ionization Equipment
High-temperature plasma ignition electrodes, ion source electrodes, gas ionization probes for thermal test benches.

• Metallurgy & High Temperature Furnace
High temperature heating electrodes, current conducting rods for sintering furnaces and melting equipment under inert atmosphere.

• Laboratory & Scientific Research
Custom tungsten electrodes for high-temperature electrochemistry, plasma experiment and material thermal simulation testing.

Quality & Service

All pure tungsten electrodes are manufactured in accordance with ASTM B760 and GB/T4181. Full inspection from raw material to finished rods. COA and EN10204 certificates available per batch.
We support sample orders, stable batch quality, fast lead time and worldwide shipment. Custom grinding, cutting and tip machining service to solve your unique high-temperature electrode requirements.

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.