Tungsten Copper Round Bar
1. What's Tungsten Copper Round Bar?
Tungsten copper round bar is rod-shaped composite material made from tungsten and copper using powder metallurgy. Since tungsten and copper have significantly different melting points and are mutually insoluble, CTIA typically compacts tungsten powder into a porous skeleton, sinters the skeleton at high temperature, and infiltrates it with molten copper. Copper fills the pores in the tungsten skeleton, forming a dense two-phase structure. Tungsten provides high melting point, hardness, and resistance to arc erosion, while copper contributes excellent electrical and thermal conductivity. CTIA's tungsten copper round bars feature uniform microstructure and high density, providing a reliable base material for precision-machined electrodes, electrical contacts, and high-temperature conductive components.
2. Characteristics of CTIA's Tungsten Copper Round Bar
(1) Superior Arc and Erosion Resistance: Delivers low surface loss under frequent arcing or high-current switching conditions, with service life significantly outperforming ordinary copper electrodes.
(2) Balanced Electrical and Thermal Conductivity: Allows electrical conductivity adjustment within approximately 27%–54% IACS based on copper content, while providing thermal conductivity of 140–290 W/(m·K) to meet dual requirements for current transmission and heat dissipation.
(3) High-Temperature Strength Retention: Maintains high mechanical strength even near copper melting point, featuring softening temperature generally above 700°C.
(4) Adjustable Coefficient of Thermal Expansion: Enables thermal expansion coefficient control within approximately 6.5–13 × 10⁻⁶/K through composition adjustment, facilitating optimal matching with adjacent materials.
(5) Good Machinability: Accommodates conventional turning, milling, grinding, and drilling while enabling fabrication into slender electrodes or specialized tip shapes with precise dimensional control.
(6) Flexible Composition Options: Covers spectrum from high-copper high-conductivity grades to high-tungsten erosion-resistant grades according to specific application conditions.
3. Applications of CTIA's Tungsten Copper Round Bar
(1) Electrical Discharge Machining (EDM): Used to machine hard materials such as cemented carbide and tool steel, offering low electrode wear, high machining accuracy, and good surface finish.
(2) Resistance Welding and Electric Upsetting: Suitable for spot welding, projection welding, butt welding, and other applications, featuring anti-sticking, high-temperature resistance, and long tungsten copper electrode life.
(3) Power Switches: Used as base material for arcing contacts or moving/fixed contacts, meeting requirements of medium- and high-voltage circuit breakers and vacuum switchgear for arc erosion resistance and electrical conductivity stability.
(4) Electronic Heat Dissipation: Can be processed into conductive rods, heat sink supports, and other components, helping high-power electronic devices quickly dissipate heat.
(5) Aerospace: Used in high-temperature environments with comprehensive requirements for thermal conductivity, temperature resistance, and dimensional stability.
4. Specifications of CTIA's Tungsten Copper Round Bar
(1) Material Composition: W50Cu50–W93Cu7, with tungsten content of 50%–93% and copper content of 7%–50%.
(2) Dimensions: Diameter: 1–60 mm; length: up to approximately 300 mm. Custom sizes are available.
(3) Machining Processes: Turning, milling, grinding, drilling, and cutting.
(4) Dimensional Tolerances: Customizable.
CTIA GROUP has nearly 30 years of experience in tungsten copper alloy manufacturing, with extensive expertise in powder metallurgy and precision machining. CTIA provides material selection, composition optimization, structural design, and precision machining for tungsten copper round bars, tailoring material properties and dimensions to meet the requirements of power switchgear, electrical discharge machining, electronic heat dissipation, aerospace, and other applications.
For any inquiry, please contact tungsten copper manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: tungsten-copper.com
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