Pure Tungsten Rod（W1 Grade）

Introduction

Pure tungsten rod is a refractory metal product manufactured from high-purity tungsten powder via isostatic pressing, high-temperature sintering, precision forging, rolling and straightening.
Tungsten has the highest melting point among all metals. It features outstanding high-temperature resistance, ultra-low vapor pressure, good thermal conductivity and low thermal expansion coefficient. Our pure tungsten rods have dense internal structure, uniform grain size and excellent dimensional stability, maintaining stable physical & mechanical properties under extreme high temperature, vacuum and heavy load conditions. No pores or cracks inside. Batch consistency is reliable for high-end industrial, electronic, medical, aerospace and new energy applications.

Core Advantages

1. Ultra-high temperature resistance
Melting point at 3422°C. It can work continuously above 2000°C without softening, deformation or failure, far superior to other common refractory metals.

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 ensure stable electrical conductivity, reliable electron emission and high-temperature structural stability, preventing performance degradation at elevated temperatures.

3. Precision machining & dense microstructure
Professional forging and finishing process, density 19.1±0.15g/cm³, no internal pores or inclusions. High straightness and smooth surface, satisfying high-precision assembly requirements.

4. Excellent vacuum performance
Extremely low vapor pressure under vacuum, no volatilization or contamination at high temperature. Ideal for vacuum furnaces and vacuum electronic equipment.

5. High creep & wear resistance
High rigidity and hardness, strong resistance against high-temperature creep deformation. Longer service life and lower replacement cost.

6. Customization available
Custom diameter, length, surface treatment and special profiles (square rod, flat rod, stepped rod) to match different application demands.

Specifications & Surface Options

• Diameter: Φ2mm ~ Φ100mm, extra small/large sizes customizable

• Length: 10mm ~ 6000mm, fixed or arbitrary cutting available

• Surface finish:

￮ Black sintered: cost-effective, oxide layer retained, for general high-temp furnace structural parts

￮ Ground: smooth surface with oxide skin removed, good dimensional accuracy, for electrodes & mechanical components

￮ Polished mirror: bright, burr-free, high finish, for high-precision electronics and medical devices

Applications

• Vacuum & High-temperature Furnace Industry
Pure tungsten rods serve as heating rods, heating elements, support pillars and high-current conductive components in high-temperature vacuum furnaces, sintering furnaces and heat treatment furnaces. Thanks to ultra-low vapor pressure, they will not volatilize or pollute furnace chamber under high vacuum and extreme heat, protecting the purity of workpieces during sintering, annealing and thermal treatment processes.

• Welding Industry
Used as TIG welding electrodes, electron beam welding cathodes and plasma welding core rods. High purity guarantees stable arc ignition, concentrated arc energy and less spatter. It is widely adopted for welding high-temperature alloys, stainless steel and refractory metals in aerospace and precision machinery manufacturing.

• Electronics & Semiconductor Industry
Applied to ion implantation equipment components, vacuum tube cathodes, electron emission assemblies and semiconductor wafer fixtures. Low impurity content ensures stable electron emission and avoids contaminating wafers. It is a critical material for high-vacuum electronic devices and semiconductor processing systems.

• Metallurgy & Glass / Rare Earth Industry
Work as high-temperature electrodes for glass melting kilns, rare earth smelting furnaces and molten salt electrolysis cells. It maintains good electrical conductivity and structural integrity under long-term contact with high-temperature molten liquid, resisting corrosion and thermal shock in harsh metallurgical environments.

• Medical & Aerospace Industry
Used for X-ray tube target substrates, aerospace high-temperature structural fasteners and thermal protection components. High density and stable performance under extreme temperature make it suitable for medical diagnostic equipment and aerospace components that need to withstand rapid temperature changes and high thermal load.

• Laboratory & Scientific Research
Custom tungsten rods are widely used for high-temperature test supports, vacuum experiment fixtures and thermal simulation test pieces in university laboratories and research institutes. It can withstand repeated high-temperature cycling and provide stable support for material research and high-temperature physical property testing.

Quality & Service

All pure tungsten rods 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 machining service is offered to solve your unique material challenges.