Discover our range of advanced copper alloys engineered for high-performance industrial applications, designed to optimize mechanical properties and electrical efficiency.
Offers superior hardness, strength, and high electrical conductivity, ideal for resistance welding electrodes, mold inserts, and aerospace applications.
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Engineered for ease of machinability with minimal tool wear, combining incredible fatigue strength with high-end conductive properties.
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Designed for critical applications demanding extreme tensile strength, excellent elasticity, and superior resistance to corrosion.
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High-strength beryllium bronze solutions optimized for structural springs, subsea connectors, and high-fatigue cycles.
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Features high wear resistance and structural compliance for dynamic loads, heavy machinery bushings, and high-friction applications.
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Exceptional electrical conductivity combined with outstanding ductility, making it ideal for electrical distribution and grounding systems.
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Offers superior electrical and thermal conductivity with excellent free-cutting capabilities, highly suited for manufacturing precision CNC parts.
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Engineered for optimal high-efficiency production processes, providing precision machinability for electric vehicle connectors and plasma nozzles.
Learn MoreEstablished in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech private company specializing in the R&D, production, and sales of high-conductivity, high-strength free-cutting tellurium copper, oxygen-free copper, and other special copper alloys. Operating from our state-of-the-art 29,000 square meter factory, we serve over 1,000 global clients and hold more than 30 patent certificates. We support high-precision industries such as new energy vehicles (NEVs), aerospace, subsea engineering, and high-frequency communication.
As a global leader in high-conductivity copper development, Kepai focuses on delivering oxygen-free copper wire and specialized alloys that offer high electrical and thermal conductivity alongside mechanical resilience under extreme thermal loads. By using eco-friendly raw materials, our processing routines satisfy international benchmarks including RoHS, REACH, and strict aerospace specifications.
Delivering up to 101% IACS conductivity for minimal signal degradation and heat generation.
Proprietary oxygen reduction refining prevents hydrogen embrittlement in high-vacuum/high-temp use.
Ultra-fine to heavy-gauge custom wire configurations designed to match your specific layout.
Incorporates proprietary grain refinement techniques for outstanding fatigue and tensile performance.
Advanced metrics backed by rigorous quality assurance systems and proprietary manufacturing processes.
Custom oxygen-free wire is highly sought after by global procurement teams who require low resistance, high purity, and reliability for critical infrastructure.
High-conductivity oxygen-free copper (OFC) wire forms the backbone of Electric Vehicle traction motors, high-power DC charging connectors, and busbars. By eliminating micro-impurities and maintaining ultra-low oxygen content, our wires significantly decrease resistive heating (I²R loss), improving vehicle range and charging efficiency.
In vacuum environments such as semiconductor fabrication, electron microscopes, and particle accelerators, conventional copper risks outgassing oxygen or failing under thermal cycles. Kepai's C10100 (OFE) oxygen-free wire contains under 5 ppm oxygen and ensures vacuum integrity under thermal stress.
Weight reduction and signal reliability are key parameters in aerospace engineering. Kepai's custom-refined oxygen-free wires are designed for extreme thermal cycles and radiation, providing reliable performance in satellite power systems, avionics wire harnesses, and military communications.
Bridging pure science with high-capacity industrial production to drive next-generation conductor innovations.
We implement advanced continuous casting under dynamic shielding gases, preventing oxygen uptake from ambient air. This keeps impurities down to individual parts-per-million levels.
Standard copper with cuprous oxide inclusions reacts with hydrogen at high temperatures to form high-pressure water vapor, causing micro-voids. Our low-oxygen refinement ensures reliable weldability and service life in hydrogen-rich atmospheres.
Aligning with modern global directives, Sichuan Kepai is refining its recycling loops. We reuse 98.5% of process waste within our manufacturing loop, helping support green supply chains.
We combine metallurgical research with highly efficient manufacturing lines to produce advanced copper alloys.
Sichuan Kepai has established an independent R&D team equipped with a complete, ISO-certified laboratory. This setup allows us to run internal spectroscopy, grain analysis, and tensile testing to verify chemical and physical characteristics.
In addition to traditional copper alloys, we have developed a highly conductive, oxygen-free tellurium copper. Compared with standard tellurium copper, this material has lower oxygen content and offers improved electrical performance.
Our quality control systems are fully certified to ISO 9001:2015, ISO 14001:2015, and OHSAS 45001:2018. This helps us ensure that our operational procedures meet recognized international standards.
We actively participate in formulating industry standards for tellurium copper and other high-conductivity alloys. This involvement helps ensure our production lines stay aligned with evolving global regulations.
Kepai is committed to environmental sustainability. By optimizing our energy consumption and transitioning to low-emission continuous drawing and extrusion techniques, we minimize our carbon footprint. Our product formulations are engineered to help global buyers meet strict environmental standards, ensuring compliance across regions like Europe, North America, and Japan.
We export to high-precision manufacturing markets worldwide, including North America, Europe, East Asia, and South America.
Sichuan Kepai has built a robust supply network to ensure reliable logistics and material support for our international clients. Our logistics processes are designed for secure packaging and timely delivery, helping to protect delicate wire spools from corrosion and mechanical damage during shipping.
Whether you require custom drawing, annealing, or specific structural alloy spools, our team provides technical and logistical support from order placement through to delivery, helping to keep your production runs on track.
Detailed metallurgical answers for procurement managers and design engineers.
C10100 (OFE - Oxygen-Free Electronic) is a high-purity copper alloy containing at least 99.99% copper, with an oxygen content limited to under 5 ppm. C10200 (OF - Oxygen-Free) contains at least 99.95% copper, with oxygen limited to under 10 ppm. C10100 offers slightly higher electrical conductivity and is optimized for ultra-high-vacuum configurations.
Standard copper contains cuprous oxide particles. At high temperatures in hydrogen environments, hydrogen can diffuse into the copper and react with oxygen to form high-pressure steam pockets. This steam forms micro-cracks along the grain boundaries, causing mechanical failure. Because oxygen-free copper lacks oxide particles, this reaction does not occur, ensuring material integrity.
Yes. Using advanced cold extrusion and high-precision drawing dies, we produce custom profiles, including flat wire, rectangular busbar wire, square wires, and multi-grooved profiles designed to meet specific engineering layouts.
Standard shapes and stock alloys are dispatched within 7–15 days. Custom dimensions or complex alloy formulations (such as specific tellurium or beryllium copper requirements) are scheduled based on manufacturing and drawing times, typically ranging from 25 to 40 days.
Adding trace amount of tellurium (as in C14500) significantly improves the copper's machinability. Standard pure copper is soft and gummy to machine, causing tool wear and burrs. Tellurium breaks up copper chips easily during high-speed CNC cutting while preserving over 93-98% of standard copper's electrical conductivity.
Yes. All copper materials leaving Sichuan Kepai's facility undergo strict environmental screening and comply with EU RoHS, REACH, and relevant international environmental directives.
Explore additional high-performance copper and bronze alloy grades customized for specialized commercial and heavy industrial applications.
Offers high electrical conductivity combined with moderate hardness and strength, optimized for projection welding dies and electrical switch parts.
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Excellent cold forming capabilities and ductility, making it a preferred selection for deep-drawn shell components, casings, and electrical stampings.
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Engineered to contain minimal levels of oxygen and volatile impurities, ensuring highly stable operations in advanced high-voltage systems.
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C14700 sulfur copper offers an optimal combination of free-machinability, high conductivity, and corrosion resistance for complex connectors.
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Premium-refined C14500 copper stock customized for automated production, offering excellent thermal transfer and consistent tool lifetime.
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High-conductivity and high-strength alloys designed to meet the electrical performance requirements of EV charging infrastructure.
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Engineered for high-friction environments, offering reliable wear resistance for bushings, bearings, and heavy-duty industrial assemblies.
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High-strength beryllium copper with added lead to enhance machinability, optimized for high-volume automated manufacturing of precision parts.
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