High-Purity Tungsten Plate
- High purity W ≥ 99.95% (W1 grade) with density up to 19.3 g/cm³
- Highest melting point among all metals — 3422°C (6192°F)
- Excellent high-temperature strength and creep resistance
- Low coefficient of thermal expansion minimizes distortion
- Available in hot-rolled, cold-rolled, polished, and ground finishes
- Custom sizes: thickness 0.05–50mm, width up to 600mm, length up to 2000mm
Description Of High-Purity Tungsten Plate
High-Purity Tungsten Plate is a flat-rolled product manufactured from unalloyed tungsten with a purity of 99.95% or higher. Leveraging tungsten’s exceptional physical properties—including the highest melting point of all metals at approximately 3,422°C (6,192°F), high density of 19.3 g/cm³, low coefficient of thermal expansion, and excellent thermal and electrical conductivity—these plates deliver reliable performance in the most demanding high-temperature environments.
Tungsten plates are produced through powder metallurgy, followed by sintering, hot rolling, cold rolling, and stress-relief heat treatment processes. Depending on the manufacturing method and thickness, high-purity tungsten plates are available in various supply states including sintered, forged, hot-rolled, cold-rolled, and vacuum-treated conditions. The plates feature a smooth, clean surface with controlled flatness and thickness tolerances, making them suitable for precision fabrication, machining, and deep-drawing applications.
The material composition complies with ASTM B760 and GB/T 3875 standards, with strict limits on impurities including carbon, oxygen, nitrogen, iron, nickel, and silicon to ensure consistent performance and reliability. High-purity tungsten plates are available in thicknesses ranging from 0.05mm to 50mm, with widths up to 600mm and lengths up to 2000mm, and can be customized to meet specific dimensional requirements.
Features Of High-Purity Tungsten Plate
Highest Melting Point: With a melting point of approximately 3,422°C (6,192°F)—the highest among all metals—tungsten plates can withstand extreme temperatures without melting or deformation.
High Density: Tungsten plates offer a density of 19.3 g/cm³—approximately 1.7 times that of lead—providing excellent mechanical strength and radiation shielding capabilities.
Excellent High-Temperature Strength: Tungsten maintains exceptional mechanical strength and creep resistance at elevated temperatures, ensuring structural integrity and long service life in demanding thermal environments
Low Coefficient of Thermal Expansion: With a low coefficient of thermal expansion, tungsten plates minimize warping and distortion when exposed to temperature changes, ensuring dimensional stability.
Good Thermal and Electrical Conductivity: Tungsten plates offer good thermal and electrical conductivity, making them suitable for heat management and electronic applications.
Corrosion Resistance: Tungsten is resistant to corrosion, which is beneficial for applications requiring exposure to chemicals or harsh environments.
Smooth Surface Finish: Available with hot-rolled, cold-rolled, polished, electropolished, or ground surface finishes to meet specific application requirements.
Customizable Dimensions: Available in thicknesses from 0.05mm to 50mm, widths up to 600mm, and lengths up to 2000mm, with custom sizes available upon request.
Usage Precautions and Limitations Of High-Purity Tungsten Plate
Atmosphere Requirements: Tungsten readily oxidizes at high temperatures in air, forming volatile tungsten trioxide (WO₃) that causes surface deterioration. Tungsten plates should be used exclusively in vacuum or inert gas atmospheres (argon, nitrogen, hydrogen, etc.) to prevent oxidation and ensure optimal performance.
Temperature Limitations: While tungsten plates can withstand temperatures approaching their melting point, the recommended maximum operating temperature for practical applications is up to 2600°C in vacuum or inert gas atmospheres. The actual maximum operating temperature depends on the atmosphere, mechanical load, and desired service life.
Machining Considerations: Tungsten is a hard and brittle material that requires specialized machining techniques. Carbide or diamond tooling is recommended for cutting, drilling, and grinding operations. Due to its tendency to work-harden, sharp cutting tools, adequate cooling, and appropriate cutting speeds are essential.
Embrittlement After High-Temperature Exposure: Tungsten undergoes recrystallization and becomes more brittle after extended high-temperature service. Once used at high temperatures, components should not be subjected to mechanical stress or reworked.
Surface Cleanliness: For applications requiring high vacuum or high purity, surface cleanliness is critical. Polished or electropolished plates are recommended over as-rolled or hot-rolled surfaces for such applications.
Specifications Of High-Purity Tungsten Plate