Explore our premium selection of highly specialized copper alloys, custom manufactured to meet global aerospace, electronic, and industrial standards.
Established in 2017, Sichuan Kepai New Material Co., Ltd. is a premier high-tech enterprise dedicated to the research, development, production, and global export of advanced special copper alloys. Nestled strategically in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, our state-of-the-art facilities afford seamless logistics pipelines to international transit hubs.
As a focal contributor to the strategic emerging materials initiatives outlined in the national 13th Five-Year Plan, Kepai has positioned itself as an industry pioneer. We focus heavily on engineering high-conductivity, easy-to-machine, and high-strength copper alloys—including specialized tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper. Our advanced materials are crucial for high-growth sectors such as new energy vehicles (NEVs), 5G networks, plasma and laser cutting systems, and high-voltage lithium battery relays.
An engineering breakdown of chemical configuration, mechanical traits, and processing behaviors of Tellurium Copper.
| Chemical Composition (Typical %) | Copper (Cu) + Impurities | Tellurium (Te) | Phosphorus (P) | Impurity Limits (Max) |
|---|---|---|---|---|
| CW118C / C14500 Standard | Balance (99.2% Min) | 0.40% – 0.70% | 0.003% – 0.012% | 0.1% max other elements |
| Physical / Mechanical Property | Value (Metric Units) | Value (Imperial Units) | Comparison to Pure Copper (C11000) |
|---|---|---|---|
| Electrical Conductivity | 54 - 57 MS/m | 93% - 98% IACS | Negligible loss (~2-5% decrease) |
| Thermal Conductivity | 355 W/(m·K) | 205 Btu/(hr·ft·°F) | Comparable heat dissipation profile |
| Machinability Rating | 85% (relative to C36000 Brass) | 85% | Over 4x higher productivity |
| Tensile Strength | 250 - 360 MPa | 36 - 52 ksi | Higher mechanical structural yield |
| Elongation at Break | 8% - 20% | 8% - 20% | Slightly reduced ductility, facilitating clean shear |
Why leading multinationals in Europe, North America, and the Asia-Pacific specify Sichuan Kepai as their primary CW118C source.
Our CW118C products are strictly certified compliant with RoHS (Restriction of Hazardous Substances) and REACH directives. As the automotive and electronics industries shift away from heavy lead alloys (like C36000 and leaded copper), our low-lead tellurium copper provides an environmentally friendly solution with matching process speeds.
By centering operations in Sichuan's major industrial development zone, Kepai leverages regional high-purity copper cathodes and raw material pipelines. This structural advantage allows us to offer highly competitive pricing, stable material outputs, and buffer stock options for multinational clients facing supply chain volatility.
We provide technical support covering regional engineering standards (ASTM, EN, JIS). Our logistics specialists facilitate international commercial terms (FOB, CIF, DDP) and handle custom clearance documentations for streamlined delivery directly to our clients' overseas assembly floors.
Examine how CW118C tellurium copper satisfies stringent design parameters in cutting-edge industries.
With electric vehicle drive systems shifting towards higher voltages (800V+) and high-amperage rapid charging (350kW+), connectors face high thermal and electrical loads. CW118C is used for EV charging plug pins, socket pins, battery contact blocks, and internal busbars. Its minimal contact resistance prevents thermal runaway, and its mechanical stability ensures reliable connectivity over thousands of insertion cycles.
Modern 5G base stations require ultra-precision RF coaxial connectors that operate without signal attenuation or phase distortion. Micro-machining of C11000 copper results in burrs that degrade signal fidelity. CW118C allows high-speed CNC turning with zero burrs and consistent thread precision, satisfying strict Intermodulation Distortion (PIM) requirements.
Plasma torches and fiber laser cutters rely on nozzles that can withstand extreme heat and electrical arcs without losing geometric integrity. Due to its high thermal conductivity, CW118C dissipates localized heat rapidly, keeping nozzle components cooler and extending operating life. This reduces maintenance downtime for fabrication shops worldwide.
In industrial relays and switchgear, contacts must withstand frequent making and breaking currents without welding together or suffering surface pitting. The deoxidized phosphorus copper phase within our CW118C formulation provides higher arc resistance and structural stability, ensuring safety and longevity in smart grids and industrial automation systems.
Our operational and commercial framework is structured to ensure quality and performance at every stage of production.
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.
Our manufacturing facility features advanced production systems and quality assurance equipment to verify alloy consistency and structural performance.
Our operations are audited under ISO framework standards, verifying chemical purity and process traceability.
Key shifts shaping the sourcing and engineering of copper alloys in global supply chains.
Answers to common engineering, procurement, and logistics questions regarding tellurium copper.
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!
Our complete line of high-conductivity, wear-resistant, and structural copper alloys.
Kepai
