Established in 2017, Sichuan Kepai New Materials Co., Ltd. has rapidly emerged as a high-tech manufacturing leader specializing in the research, development, fabrication, and global distribution of advanced, strategic copper alloys. Situated in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, our state-of-the-art facility spans over 9,000 square meters of highly optimized production zones and 1,000 square meters of administrative and engineering design space.
Our core manufacturing capabilities are directly aligned with national strategic emerging materials directives, focusing on high-performance alloys including tellurium copper, high-conductivity oxygen-free copper (OFC), silver copper, and dispersion-strengthened copper. We solve the trade-off between electrical conductivity, mechanical strength, and machinability, providing custom-engineered solutions for the most demanding applications in new energy vehicles (NEVs), 5G networks, high-precision laser cutting, and lithium battery relays.
Oxygen-Free Copper (OFC) represents the pinnacle of high-purity copper processing. Manufactured through specialized vacuum induction or inert gas protected smelting setups, OFC exhibits an oxygen content lower than 0.001% (10 ppm) and an overall copper purity level reaching at least 99.95% (under C10200 designations) or 99.99% (under C10100 Oxygen-Free Electronic / OFE standards). Unlike conventional Electrolytic Tough Pitch (ETP) copper, which contains residual oxygen in the form of cuprous oxide (Cu2O) inclusions, OFC is immune to hydrogen embrittlement when exposed to reducing atmospheres at elevated working temperatures.
| Alloy Grade (UNS) | Cu Purity (Min %) | Oxygen Content (Max) | Electrical Conductivity (IACS %) | Thermal Conductivity (W/m·K) | Primary Application Fields |
|---|---|---|---|---|---|
| C10100 (OFE) | 99.99% | 5 ppm (0.0005%) | ≥ 101% | 391 | Semiconductors, vacuum electronics, superconductors |
| C10200 (OFC) | 99.95% | 10 ppm (0.001%) | ≥ 100% | 388 | High-performance audio cables, power relays, busbars |
| C14500 (Te-Cu) | 99.50% (Te: 0.4-0.7%) | Oxygen-Free base | ≥ 93% | 355 | High-speed machining parts, laser cutting nozzles |
| C17500 (Be-Co-Cu) | Bal (Be: 0.4-0.7%, Co: 2.4-2.7%) | Trace levels | ≥ 60% | 240 | Heavy-duty electrical contacts, welding equipment |
This absence of cuprous oxide structures at the grain boundaries drastically improves the metal's ductility, fatigue resistance, and structural integrity under cyclic thermal stress. For industrial developers, choosing the right OFC variant determines the long-term reliability of power electronics, signal transmission grids, and extreme-load automotive switchgear.
The rapid transition to 800V EV architectures demands high-voltage electrical relays, power distribution units, and battery busbars that display exceptional thermal dissipation and near-zero resistive heating. High-conductivity OFC ensures high efficiency and fire safety under rapid charging loads.
High-frequency RF coax connectors, microwave components, and semiconductor leadframes rely on the microstructural purity of OFC to minimize signal attenuation, intermodulation distortion, and phase variations at millimetric wavebands.
Precision processing elements, including plasma nozzles, welding tips, and laser cutting heads, demand materials that can handle intensive heat transfers without deformation. Tellurium and oxygen-free copper blends offer the perfect equilibrium of thermal endurance and machinability.
To assist global enterprises in optimizing project lifecycles, Sichuan Kepai New Materials provides integrated manufacturing solutions that mitigate procurement risks, guarantee engineering standards, and reduce final assembly scrap rates.
Industrial components have unique performance thresholds. Whether requiring high yield strength combined with high electrical conductivity or structural resilience against elevated brazing temperatures, our specialized engineers tailor copper, tellurium, beryllium, and cobalt ratios to optimize physical properties.
Unlike generic copper workshops, Kepai oversees the entire metallurgical lifecycle from high-purity vacuum casting and rolling/drawing to non-destructive testing and final chemical analysis. Our internal labs feature eddy current conductance meters, micro-hardness machines, and metallographic analyzers.
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.
We manage every facet of production with dedicated industrial machinery and inspection devices, ensuring total mechanical precision and metallurgical uniformity.
Kepai operates under ISO 9001 and ISO 14001 frameworks. Every batch of high-purity copper is supplied with an official mill test certificate showing structural properties and complete chemical compositions.
As the global demand for clean energy and high-speed communications accelerates, Sichuan Kepai is positioning itself at the leading edge of next-generation copper metallurgy. Our technology roadmap focuses on three main developments:
Further reducing oxygen content below 3 ppm and improving total purity levels beyond 99.999%. This research targets superconducting systems and next-generation quantum computing circuits.
Refining internal grain boundaries with nanoscale ceramic or metal oxide inclusions to elevate tensile strength without compromising thermal and electrical conductivities.
Developing free-cutting copper alternatives that bypass regulatory lead restrictions to meet strict European RoHS directives, maintaining excellent machinability and conductivity.
ETP (Electrolytic Tough Pitch) copper contains a small amount of oxygen (typically 200 to 400 ppm) in the form of cuprous oxide. When ETP is exposed to hydrogen at temperatures above 370°C, it suffers from hydrogen embrittlement. OFC (Oxygen-Free Copper) contains less than 10 ppm of oxygen, making it highly resistant to hydrogen embrittlement. This makes OFC the preferred choice for vacuum processes, electronic brazing, and critical electrical components.
Adding tellurium to oxygen-free copper creates tellurium copper (UNS C14500). The copper retains its high electrical and thermal conductivity (roughly 93% to 98% IACS), while the addition of tellurium acts as a chip breaker. This improves the machinability rating from 20% (for pure copper) to 85%, allowing for high-speed machining without excessive tool wear.
Sichuan Kepai conducts raw material screening to trace chemical purity. All our products are compliant with the EU RoHS and REACH directives. Our manufacturing process excludes hazardous elements, and each shipment is accompanied by complete SGS test results and material certificates.
Our in-house quality control utilizes eddy current conductance instruments to verify electrical conductivity, hardness testers for tensile and compressive strength, and metallographic sample polishers to inspect grain structure. We also utilize microcomputer-controlled electro-hydraulic servo universal testing machines for dynamic load evaluations.
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
