Explore our top-tier inventory of high-conductivity, oxygen-free copper variants tailored for high-demand electrical and machining operations.
In modern manufacturing, demand is surging for materials combining high electrical conductivity and excellent machinability. Standard copper variants typically force engineers to choose between these qualities. However, Oxygen-Free High-Conductivity Tellurium Copper (OFHC Te-Cu), classified as C14500 under UNS standards, provides both. Its development is accelerating to support heavy industries, aerospace technology, and precision electronic components.
Industries are shifting from traditional Electrolytic Tough Pitch (ETP) copper to OFHC Tellurium Copper. The reason lies in tellurium micro-alloying. Adding about 0.4% to 0.7% tellurium creates tiny, uniformly dispersed copper telluride phases. This configuration works as a built-in chip breaker. It increases the alloy's machinability rating to 85% (compared to 20% for pure copper) while maintaining over 93% IACS electrical conductivity.
As global sustainability initiatives call for energy-efficient production, using free-cutting OFHC tellurium copper alloys significantly reduces tool wear and power usage on high-speed CNC lines. This trend positions the alloy as a core material for smart energy grids and high-frequency communication infrastructure.
| Metric Property | Typical Value |
|---|---|
| Electrical Conductivity | 93% - 98% IACS |
| Machinability Rating | 85 (Free-cutting standard) |
| Thermal Conductivity | 355 W/(m·K) |
| Tensile Strength | 250 - 380 MPa |
| Oxygen Level | < 10 ppm (Oxygen-Free Grade) |
How tier-1 engineering and sourcing departments qualify oxygen-free tellurium copper suppliers for high-stakes projects.
High-voltage charging connectors, battery terminals, and solid-state relays require materials that carry high currents without thermal runaway. OFHC Tellurium copper provides a low-resistance contact interface that handles large current surges while maintaining its physical shape and structural stability.
Cutting nozzles are exposed to high thermal stress. C14500's thermal dissipation properties help cool the nozzle tip, while its high machinability allows for precise internal geometries. This combination extends the operational life of the consumable components.
RF signal transmission requires low attenuation and clean connections. Free-machining tellurium copper allows manufacturers to turn sub-millimeter components on Swiss-type lathes. This yields smooth surface finishes that help minimize signal loss at high frequencies.
Sichuan Kepai New Material Co., Ltd. uses digital manufacturing setups to produce consistent copper alloys. By integrating casting, extrusion, drawing, and straightening lines, we maintain uniform composition and mechanical properties across large production runs.
Our raw materials are sourced as high-purity cathode copper. Smelting is monitored with spark emission spectrometers and oxygen analyzers to keep oxygen content below 10 ppm. This low-oxygen environment prevents hydrogen embrittlement during subsequent brazing or welding.
Our location in the Sichuan Guanghan Industrial Development Zone provides direct access to domestic raw materials and primary transport links. This proximity helps us maintain stable production schedules and secure shipping windows for our global distribution partners.
"By combining lean-production processes with precise alloy chemistry, Kepai supports international OEMs with customized profiles, consistent supply lines, and documented quality inspection reports."
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. Currently, the factory covers an area of approximately 9,000 square meters, with an office space of about 1,000 square meters.
The company primarily engages in the production of strategic emerging new materials for the national 13th Five-Year Plan, including special copper alloys such as tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, while also focusing on the research and development of high-conductivity, easy-to-machine, high-strength copper alloys. The products are mainly applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
The company is located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, boasting a superior geographical location and convenient transportation, which lays a solid foundation for the rapid development of the enterprise. Since its establishment, Kepai has adhered to the business philosophy of "innovation-driven development, quality wins the market," committed to providing customers with the highest quality high-end copper alloy materials, and promoting industrial upgrading and sustainable development.
Explore the pillars that support Sichuan Kepai's reputation as a reliable global exporter of specialized copper alloys.
Technological innovation is the core competitiveness of Sichuan Kepai New Materials Co., Ltd. The company has a research and development and production team composed of senior industry experts who keep pace with international cutting-edge technology trends and continuously explore the unknown boundaries in the field of new copper alloy materials. Through a combination of independent research and development and industry-university-research collaboration, Kepai has made breakthrough progress in several areas, including high-performance tellurium copper, lead copper, and sulfur copper. Many of its technological achievements have reached international advanced levels.
Kepai's product line is rich and diverse, covering a comprehensive range of solutions from basic materials to high-end customization. We focus on providing customers with high-performance, high-quality high-end copper alloy products, including but not limited to pure copper, oxygen-free copper, oxygen-free high-conductivity tellurium copper, nickel tellurium copper, tin bronze, beryllium copper, lead bronze, sulfur copper, and chromium zirconium copper. These products play an important role in reducing production costs and enhancing product performance due to their excellent physical and chemical properties.
In the face of global market competition, Sichuan Kepai New Materials adheres to the development strategy of "rooted in Sichuan, radiating nationwide, and moving towards the world." By continuously optimizing market layout and improving the sales network, we have established a stable customer base in multiple provinces and cities across the country and have formed long-term cooperative relationships with several internationally renowned enterprises.
We understand that the long-term development of an enterprise is inseparable from an excellent corporate culture. We advocate the corporate spirit of "integrity, innovation, collaboration, and win-win," encouraging employees to explore boldly and innovate courageously, while also emphasizing teamwork and talent cultivation, striving to create a harmonious, open, and inclusive work atmosphere. We believe that only by continuously pursuing excellence and creating value can we win the trust of customers and the respect of society.
Our testing and processing equipment maintains batch uniformity and compliance with international standards.
Our processes are certified to meet international industrial standards and quality controls.
Get professional answers about OFHC Tellurium Copper metallurgy, custom fabrications, and global supply logistics.
Explore our full line of specialized alloys, including beryllium, brass, and performance-grade copper materials.
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to focus on research and production in the field of new materials. We supply specialty copper alloys to support domestic and international manufacturing projects. Contact our engineering team for specifications, sample testing, or custom quotes.
Kepai
