In high-end electrical engineering, aerospace, and precision machining, designers face a fundamental trade-off. Standard Pure ETP Copper (C11000) possesses exceptional conductivity (>101% IACS) but is extremely sticky and difficult to machine, yielding low production speeds and heavy tool wear. Conversely, free-cutting brass features excellent machinability but suffers from poor electrical performance (typically 26-28% IACS).
UNS C14500 Tellurium Copper Alloy breaks this limitation. By introducing a precisely controlled amount of tellurium (0.4%–0.7%), C14500 forms a matrix containing dispersed copper telluride (Cu2Te) particles. These particles act as highly effective chip breakers, yielding short, manageable chips and reducing friction. The result is a material with a machinability rating of 85% (relative to free-cutting brass) while retaining 93% to 98% IACS electrical conductivity.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales.
Currently, our modern industrial manufacturing plant covers an area of approximately 9,000 square meters, supported by an advanced office space of about 1,000 square meters. The company primarily engages in the production of strategic emerging new materials targeted under the national 13th Five-Year Plan.
Our core focus is the design and synthesis of specialized copper alloys, including tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper. We place strategic investment in the research and development of high-conductivity, easy-to-machine, and high-strength copper alloy materials.
Our outputs are key building blocks in global high-tech sectors, notably new energy electric vehicles (EVs), 5G telecommunication networks, industrial plasma/laser cutting, and lithium battery safety relays.
The company is located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108. This superior geographical positioning provides robust transport links for container shipping, ensuring rapid raw material intake and prompt export deliveries to global ports.
High-speed DC fast-charging guns and vehicle battery management systems require connectors that withstand high currents without thermal runaway. C14500 offers the perfect combination of conductivity and wear resistance for EV charging terminals.
High-frequency RF connectors require complex geometries, tight tolerances, and clean contact faces. C14500's superior machinability facilitates high-speed swiss turning of intricate coaxial pins while preserving high signal fidelity.
Plasma cutting nozzles and gas tips require high heat dissipation to prevent premature deformation. Under extreme temperatures, Kepai C14500 ensures long-life stability and consistent gas flow dynamics.
Power grid switch assemblies and solid-state relays require materials that resist oxidation and arc-welding. The introduction of phosphorus-deoxidized tellurium copper guarantees continuous power conduction with zero fault risk.
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 and have been successfully applied in various industries such as new energy vehicles, precision machining parts, plasma cutting, relays, and energy storage, earning widespread recognition and praise in the market.
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 and environmental friendliness, creating significant economic and social benefits for customers.
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.
At the same time, the company actively expands into overseas markets, participates in international competition and cooperation, and strives to promote Kepai's brand influence on the global stage.
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.
| Alloy Group (UNS) | Copper (Cu) % | Tellurium (Te) % | Phosphorus (P) % | Electrical Cond. (% IACS) | Machinability Index |
|---|---|---|---|---|---|
| C14500 (OFT Grade) | Balance (Min 99.2%) | 0.40 - 0.70 | 0.003 - 0.012 | 93% - 98% | 85 |
| C11000 (ETP Copper) | Min 99.90% | - | - | 101% | 20 |
| C36000 (Free-Cut Brass) | 60.0 - 63.0 | - | - | 26% | 100 |
| C14700 (Sulfur Copper) | Balance | - (0.2-0.5% S) | 0.003 - 0.012 | 90% - 95% | 85 |
For OEMs distributing worldwide, meeting international material regulations is non-negotiable. Sichuan Kepai manufactures C14500 in strict compliance with international frameworks, ensuring your end products encounter no import roadblocks:
Unlike leaded free-cutting copper alloys, tellurium copper utilizes Te rather than Pb, ensuring safety under European and North American electronics safety directives.
All our raw stock bar, rod, and wire shapes are certified to meet ASTM B301/B301M dimensional tolerances and electrical conductivity metrics.
Each production run is documented with complete heat number tracking, ICP chemical testing, and physical properties verification sheets.
Refining extrusion heat treatment profiles to shrink the size of Cu2Te inclusions, raising tensile strengths up to 400 MPa while maintaining >95% IACS.
Scaling tellurium copper and sulfur copper solutions as non-toxic alternatives for leaded brasses in potable water and green microelectronics projects.
Deploying industrial IoT sensors across smelting lines to track real-time chemistry variation, cutting carbon output by 22% by 2026.
As global industries pivot toward ultra-fast electric vehicle charging stations (megawatt charging systems), electrical interfaces will encounter unprecedented current volumes. Conventional copper alloys are unable to operate at these performance limits without experiencing excessive thermal deformation.
At Sichuan Kepai, we are expanding research into high-purity, oxygen-free tellurium copper. Removing oxygen from the copper matrix prevents hydrogen embrittlement during brazing or welding. This allows automotive OEMs to safely weld high-efficiency, cold-formed connectors to massive cabling harnesses.
Additionally, our localized applications team provides custom profiles, tubes, and bars tailored to specific automatic CNC lathe setups in North America, Western Europe, and Southeast Asia. We reduce setting times, optimize cutting geometries, and reduce production costs for tier-1 suppliers globally.
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to uphold its original intention, with even greater enthusiasm and determination, to engage in research and application in the field of new materials, contributing to the development of the new copper alloy materials industry in China and globally. We look forward to working hand in hand with friends from all walks of life to create a brilliant future together!
Kepai