Pure Tungsten Block（W1 Grade）

Introduction

Pure tungsten block is a high-performance refractory metal blank fabricated from high-purity tungsten powder by isostatic pressing, high-temperature sintering and forging. Tungsten possesses 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 blocks have dense internal structure, uniform grain size and excellent dimensional stability. They can maintain stable physical and mechanical properties under extreme high temperature, vacuum and heavy load conditions, free of pores and cracks. Consistent batch quality makes them widely used in high-end industrial, electronic, medical, aerospace and new energy sectors.

Core Advantages

1. Ultra-high temperature resistance

Melting point at 3422°C. It can operate continuously above 2000°C without softening, deformation or failure, outperforming most other 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 flatness and smooth surface, meeting strict high-precision machining and 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 length, width, thickness, surface treatment and special shapes (tungsten cube, stepped block, notched block, circular blank) to match different application demands.

Specifications & Surface Options

Size: Custom length × width × thickness; standard blanks & finished machined parts available

Thickness range: ≥2mm, ultra-thin tungsten sheet and thick heavy block customizable

Surface finish:

- Black sintered: cost-effective, oxide layer retained, for general high-temperature 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 blocks are used as furnace liners, heat shields, support bases, heating element holders 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 contaminate the furnace chamber under high vacuum and extreme heat, protecting workpiece purity during sintering, annealing and thermal treatment.

Welding & Thermal Processing Industry

Applied as backing blocks, heat sinks and electrode bases for electron beam welding and high-temperature thermal processing. High thermal conductivity helps dissipate heat rapidly and stabilizes welding thermal field for precision welding of high-temperature alloys and refractory materials.

Electronics & Semiconductor Industry

Used for ion implantation equipment shielding blocks, vacuum tube structural bases, electron emission holders and semiconductor fixture substrates. Low impurity content ensures stable electron emission and avoids wafer contamination. It is a critical material for high-vacuum electronic devices and semiconductor processing systems.

Metallurgy & Glass / Rare Earth Industry

Serve as high-temperature electrode bases, crucible supports and heat insulation blocks for glass melting kilns, rare earth smelting furnaces and molten salt electrolysis cells. They maintain good electrical conductivity and structural integrity under long-term exposure to high-temperature molten liquid, resisting corrosion and thermal shock in harsh metallurgical environments.

Medical & Aerospace Industry

Used for X-ray shielding substrates, radiation shielding blocks, aerospace high-temperature structural supports and thermal protection components. High density and stable performance under extreme temperature make it suitable for medical diagnostic equipment and aerospace components that withstand rapid temperature changes and high thermal loads.

Laboratory & Scientific Research

Custom tungsten blocks are widely used for high-temperature test platforms, 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 blocks 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 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.