Explore our state-of-the-art C14500 and high-conductivity copper series engineered to absolute performance and international quality standards.
Bridging scientific discovery and precision engineering to manufacture global-grade industrial copper solutions
Established in 2017, Sichuan Kepai New Materials Co., Ltd. stands as a premier national high-tech enterprise. We seamlessly integrate advanced research, development, precision production, and global sales. Headquartered in a state-of-the-art facility covering 9,000 square meters alongside a 1,000 square meter engineering office, our corporate strategy responds directly to advanced manufacturing programs, emphasizing strategic emerging new materials.
Our comprehensive research portfolio focuses on special copper alloys—specifically tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion-strengthened copper. Kepai is dedicated to solving the trade-off in copper alloys: retaining high electrical conductivity while maximizing tensile strength and machinability. These products represent vital components across clean energy systems, smart charging infrastructure, high-frequency telecommunications, high-power electronics, plasma technology, and aerospace assemblies.
An engineering exploration into the microstructural advantages, mechanical tolerances, and thermal characteristics of tellurium-doped copper matrices.
Tellurium Copper (UNS C14500) contains roughly 0.4% to 0.7% tellurium (Te) and 0.004% to 0.012% phosphorus (P). This formulation results in telluride particles dispersed uniformly throughout the copper matrix. These particles act as natural chip breakers during machining operations, providing an excellent machinability rating of 85% compared to free-cutting brass (C36000), drastically reducing tooling wear and cycle times.
Unlike other alloying agents like zinc, tin, or aluminum which dramatically decrease electrical properties, tellurium maintains high electrical and thermal conductivity. Typical C14500 alloys from Kepai achieve conductivity levels above 93% IACS (International Annealed Copper Standard). This ensures maximum efficiency in power transmission, electric vehicles, and high-frequency RF systems.
The addition of controlled phosphorus limits the presence of cuprous oxide within the material. This provides excellent resistance to hydrogen embrittlement when exposed to reducing atmospheres at elevated temperatures. It makes our tellurium copper suitable for gas-shielded arc welding, brazing, and high-temperature vacuum systems.
With thermal conductivity at approximately 355 W/(m·K), Kepai’s tellurium copper behaves as an efficient thermal conduit. In rapid laser cutting, power transmission, and aerospace applications, the material draws heat away from critical contact points, minimizing thermal expansion errors and maintaining strict component tolerances.
C14500 displays high resistance to atmospheric corrosion, salt water, and mild acidic environments. The protective oxide layers form rapidly on the alloy's surface, preventing pitting. This property is crucial for outdoor EV charging couplers, marine-grade electronics, and industrial plasma torches operating in corrosive cutting environments.
Featuring a tensile strength ranging from 250 to 380 MPa depending on the temper (hard, half-hard, or annealed) and an elongation capacity of 10% to 25%, C14500 enables intricate cold-working, forming, and thread-rolling processes without fracturing or developing structural stress lines.
Discover how Sichuan Kepai guarantees consistency, reliability, and technical excellence through systematic manufacturing processes.
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.
Deploying specialized alloys to satisfy the rigorous physical demands of global infrastructure and clean energy systems.
The global push for EVs requires rapid, high-power DC charging. Kepai’s oxygen-free tellurium copper is widely utilized to manufacture charging terminal pins and receptacle sockets. With 93%+ IACS conductivity and robust wear characteristics, these contact terminals resist overheating and withstand thousands of insertion-withdrawal cycles, ensuring the stability of highway charging infrastructure.
High-frequency telecom equipment demands low signal attenuation and precise thermal dissipation. Our C14500 materials are fabricated into coaxial connector bodies, RF adapters, and high-frequency wave-guides. High dimensional stability ensures signal integrity, while rapid heat conduction prevents structural warping within sealed base stations.
Plasma cutting torches operate under extreme thermal conditions. Nozzles and electrode holders must withstand arc temperatures exceeding 10,000°C. Using oxygen-free tellurium copper provides rapid thermal dissipation, preventing premature melting, stabilizing arc geometry, and extending the operational lifespan of the cutting tips.
Take a closer look at our end-to-end manufacturing machinery, testing laboratories, and global quality compliance certificates.
Smelting
Laying-off
Extrusion
Drawing
Straightening
Package
Eddy Current Conductance
Chemical Composition Testing
Metallographic Polishing
Electro-hydraulic Servo Test
Electronic Universal Testing
Hardness Tester
Adapting raw material distribution and technical compliance to the demanding regulatory requirements of global markets.
Navigating global supply chain regulations is a key focus for Kepai. Industrial manufacturers in North America, Western Europe, and East Asia must meet local standards regarding toxic substances, raw material origins, and heavy metal limits. By producing high-conductivity tellurium copper (C14500) that maintains strict compliance with EU RoHS and REACH directives, Kepai provides seamless supply chain integration for automotive OEM and aerospace suppliers.
Additionally, we work closely with local logistics hubs and processing centers to provide JIT (Just-In-Time) inventory solutions, custom packaging, and technical field support. Whether your production facility is located in Germany, North America, or Southeast Asia, Kepai offers custom extrusions, wire rods, sheets, and pre-machined blanks designed to feed directly into automatic lathe machines, reducing scrap rates and lowering overall operational costs.
Engineering the future of clean metallurgy: developing ultra-high purity, oxygen-free tellurium copper alloys.
Scaling up the production of high-performance oxygen-free tellurium copper. By reducing oxygen content below 10ppm, we eliminate cuprous oxide formation completely, providing optimal weldability, structural integrity, and ductility for high-vacuum, hydrogen-rich applications.
Integrating AI-driven visual defect detection and automatic feedback loops on drawing and extrusion lines. By tracking microstructure variations in real time, Kepai ensures high batch-to-batch consistency for precision components.
Implementing a zero-waste recycling model where clean tellurium copper turnings from customers are collected and re-melted using clean energy induction furnaces, minimizing the environmental footprint of our metallurgical supply chain.
Detailed technical answers to common industrial and chemical inquiries regarding tellurium copper alloys.
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!
A comprehensive product portfolio to optimize wear resistance, mechanical strength, and electrical performance.
Kepai