Explore our industrial-grade pure copper and engineered copper alloy products, manufactured to meet strict international standards and optimize your production efficiency.
In the contemporary landscape of high-precision engineering and energy transition, the demand for advanced copper materials has reached an unprecedented scale. Sichuan Kepai New Material Co., Ltd., established in 2017, operates at the very forefront of this technical revolution. As a high-tech enterprise integrated with research and development, manufacturing, and international trade, we supply the key materials driving next-generation infrastructure, aerospace development, 5G networking, and global decarbonization.
Occupying a modern facility in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, Kepai manages approximately 9,000 square meters of production area and 1,000 square meters of administrative and specialized research offices. We specialize in strategic emerging new materials aligned with global technological shifts—focusing specifically on tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, while continuously developing novel alloys that optimize conductivity, structural strength, and machinability.
Pure copper and complex copper alloys serve as the backbone of modern technological systems. As industries strive to minimize energy loss and maximize heat dissipation, selecting the appropriate copper grade becomes a critical design bottleneck. Sichuan Kepai New Material Co., Ltd. has developed specialized alloy configurations to solve complex engineering challenges across several major sectors:
We supply high-purity oxygen-free copper and high-conductivity tellurium copper alloys for electric vehicle battery pack interconnects, busbars, charging connectors, and power relays. These materials ensure high current-carrying capacity with minimal thermal rise, enhancing vehicle safety and battery longevity.
Modern telecommunication networks require micro-connectors, coaxial cables, and components that maintain high signal fidelity at elevated frequencies. Our copper alloys feature optimal electrical properties alongside mechanical stability to withstand thermal stress in high-density base stations.
Laser cutting nozzles are subject to intense heat and spatters. Tellurium copper (C14500) provided by Kepai is the material of choice here due to its outstanding free-machining performance, combined with exceptional electrical and thermal conductivity, drastically extending the service life of cutting tips.
Technical Insignia: "By incorporating trace amounts of dopants like tellurium, sulfur, or chromium-zirconium under vacuum smelting processes, Kepai achieves a perfect balance: retaining up to 98% IACS electrical conductivity while increasing mechanical wear resistance and machinability by up to 85% compared to pure electrolytic copper."
The global copper alloy market is undergoing a structural shift. The rapid rise of smart grids, electrification of transport systems, and complex electronics manufacturing has intensified the demand for high-end copper alloy profiles, rods, and custom wire formats. Standard Grade-A copper cathode (99.95%) is no longer sufficient for specialized applications. Modern industries require controlled oxygen levels (often < 5 ppm for oxygen-free high-conductivity copper) to prevent hydrogen embrittlement during high-temperature operations.
Kepai serves this global market from its strategically positioned base in Sichuan, China. By utilizing advanced domestic supply chains and regional raw materials, we maintain a resilient production system capable of fulfilling bulk shipments to Europe, North America, and Southeast Asia. We assist companies globally to navigate trade challenges, offering raw materials that fully comply with international testing methodologies and metallurgical purity standards.
At Sichuan Kepai, technical innovation is not a buzzword—it is the baseline of our production. We have cultivated an in-house engineering team composed of industry veterans and metallurgical researchers. Through industry-university partnerships, we continuously improve vacuum induction melting (VIM), continuous casting, and cold drawing processes.
Our comprehensive catalog covers pure copper varieties and specialized high-performance copper-based alloys designed for high-stress applications:
Featuring low volatile impurities and exceptional vacuum compatibility, this grade prevents hydrogen embrittlement, making it suitable for high-power electronics, semiconductor processing equipment, and particle accelerators.
By blending trace tellurium into high-purity copper, we manufacture C14500, a material offering up to 98% IACS conductivity while maintaining excellent free-machining performance, ideal for automatic screw machines.
Precipitation-hardened alloy combining high hardness, tensile strength, and electrical conductivity. Used for resistance welding electrodes, switchgear components, and continuous casting molds.
Specifically engineered for heavy-duty spring contacts, non-sparking tools, and oilfield components. Offers high mechanical strength, corrosion resistance, and thermal durability.
Engineered primarily for complex electrical terminals and connector bodies that require fast cycle times during machining without compromising basic electrical properties.
We work closely with customers to formulate specific mechanical properties, specialized profiles, and custom tolerances to meet the requirements of particular projects.
Sichuan Kepai New Materials operates with a strict quality first ethos. The company features a comprehensive manufacturing workflow, utilizing state-of-the-art smelting, extrusion, and testing hardware. We balance physical output with rigorous quality checks to verify the chemical composition and mechanical tolerances of each batch.
Our specialized laboratories allow us to perform raw material assays, microstructure analyses, and mechanical stress tests to confirm chemical and physical specs before shipping.
From melting and casting to drawing and straightening, our production processes are closely monitored to eliminate interior porosity, inclusions, and external surface defects.
We supply materials across a wide network of international destinations, supporting diverse industrial hubs with fast transit and documentation solutions.
Operating in a global marketplace requires more than just high-quality manufacturing; it demands strict adherence to international environmental and safety standards. At Sichuan Kepai, we ensure that all our materials meet or exceed global standards:
Smelting
Laying-off
Extrusion
Drawing
Straightening
Package
Eddy Current Conductance Instrument
Chemical Composition Test Room
Metallographic Sample Polishing Machine
Electro-Hydraulic Servo Testing Machine
LCD Electronic Universal Testing Machine
Hardness Tester
The roadmap for high-conductivity copper alloys centers on resolving the traditional trade-off between mechanical strength and electrical conductivity. Traditional alloys gain strength by sacrifice of conductivity; our current R&D focuses on overcoming this limit through several technical pathways:
Integrating nano-scale ceramic particles (like alumina) into the copper matrix. This technique blocks dislocation motion, boosting high-temperature strength while leaving the copper matrix's electrical conductivity mostly unaffected.
Upgrading our vacuum induction furnace capacities to reduce trace oxygen and sulfur contents down to single-digit ppm, enhancing the raw material's resistance to thermal fatigue in ultra-high vacuum applications.
In response to tightening global environmental regulations, we are developing alternative free-machining copper alloys using harmless elements (such as bismuth or sulfur) to phase out lead-bearing alloys while retaining machining efficiency.
Developing multi-layer composite conductors combining copper's excellent conductivity with the high structural strength of steel or light weight of aluminum to meet next-generation electric vehicle design needs.
Our quality management system is fully documented and independently audited. Each shipment includes a Material Test Report (MTR) detailing exact chemical composition, tensile characteristics, and electrical conductivity values.
C11000 is electrolytic tough pitch copper, which offers standard high electrical conductivity (100% IACS) but is highly gummy and difficult to machine, causing excessive tool wear. C14500 Tellurium Copper contains 0.4% to 0.7% tellurium, which creates fine, discontinuous chips during machining. This improves the machinability rating from 20% to 85% of free-cutting brass, while retaining 93% to 98% of copper's pure electrical conductivity.
Standard copper containing cuprous oxide releases steam at the grain boundaries when exposed to hydrogen at high temperatures (above 400°C), causing micro-cracking and mechanical failure. High-purity oxygen-free copper reduces the oxygen content to less than 10 ppm (and often less than 5 ppm). This prevents the internal formation of steam, ensuring structural integrity during brazing, welding, or vacuum heating processes.
C18150 undergoes precipitation hardening, combining chromium and zirconium to create fine precipitates within the copper matrix. This allows it to retain high mechanical strength and hardness at temperatures up to 500°C, while providing good electrical conductivity (~80% IACS). It is ideal for spot welding electrodes, where the tip must withstand high physical force at high temperatures without softening.
Yes. Through our integrated R&D team and flexible casting equipment, we can accommodate custom chemical formulations (e.g., specific silver-bearing copper compositions for motor commutator segments) and tight dimensional tolerances for extruded rods, hollow profiles, and custom wires.
Browse our advanced copper-cobalt, lead-bronze, phosphor-copper, and other specialized alloys engineered for demanding industrial environments.
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