Explore our range of high-conductivity, wear-resistant, and structural copper alloys tailored specifically for high-efficiency components and automatic screw machine applications.
In the highly competitive landscape of modern manufacturing, achieving excellent machinability is no longer just a technical preference; it is a primary driver of operational profitability. Globally, precision engineering is shifting toward faster spindle speeds and automated CNC operations. High ductility in raw metals—especially pure copper—often leads to "gummy" machining behavior. This results in continuous, stringy chip nests that wrap around tooling, cause excessive heat buildup, degrade surface finish, and dramatically shorten cutting tool lifespan.
To counter these mechanical issues, modern metallurgy introduces micro-alloying elements like Tellurium (Te) and Sulfur (S). These elements create discrete, microscopic second-phase particles that act as internal chip-breakers and solid lubricants. Tellurium copper (UNS C14500) and sulfur copper (UNS C14700) achieve a machinability rating of 85% relative to Free-Cutting Brass (C36000), while preserving over 85% to 93% IACS electrical conductivity. This combination allows global industries to manufacture complex, high-conductivity components at scale without suffering high scrap rates or frequent tool replacements.
Micro-additives form delicate inclusions in the copper matrix. Under stress from a cutting tool, the material shears cleanly, generating short, manageable C-shaped chips that flush away easily, preventing scratching on critical contact surfaces.
By reducing cutting force requirements and frictional temperatures, tool wear rates fall by up to 60%. CNC operators can push feed rates higher, decreasing unit cycling times and maximizing machine efficiency.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. Currently, our factory covers an area of approximately 9,000 square meters, complemented by an office space of about 1,000 square meters. The company primarily engages in the production of strategic emerging new materials for the national 13th Five-Year Plan, including special copper alloys such as tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, while also focusing on the research and development of high-conductivity, easy-to-machine, high-strength copper alloys. Our products are widely applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
Our manufacturing philosophy balances technological innovation with strict adherence to environmental and quality standards. Located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, we possess a superior geographical location and convenient transport connections, laying a solid foundation for rapid enterprise development and efficient international logistics.
The international demand for high-machinability copper is driven by strict environmental directives and the rapid expansion of high-voltage, high-frequency technological sectors. Here is an overview of how we align our metallurgy with global purchasing requirements.
Global initiatives like RoHS 3 and REACH have heavily restricted lead content in raw components. Our lead-free and low-lead copper alloys, such as C14500 (Tellurium Copper) and C14700 (Sulfur Copper), provide an ideal alternative to leaded brasses, delivering excellent performance while meeting environmental regulations.
Modern EV charging terminals and 5G base station transmitters cannot afford high resistance. Traditional free-cutting brass sacrifices conductivity for machine speed. Our high-machinability tellurium copper ensures conductivity values remain above 85% IACS, reducing heat generation in high-current applications.
While high-performance alloys carry a premium raw material cost compared to standard ETP copper, they yield substantial operational savings. The combination of faster CNC throughput, lower tooling consumption, and fewer secondary deburring steps results in a lower cost per finished piece.
We combine technological innovation, a versatile product system, global market layout, and a progressive corporate culture to deliver exceptional value.
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.
From casting and smelting to advanced microstructural and hardness analysis, we maintain complete control over the fabrication process to ensure high-conductivity, easy-to-machine copper alloys.
High-machinability copper alloys are core components in many cutting-edge technologies. Below are the key applications where these materials are vital:
Electric vehicles and charging infrastructure handle significant current loads under high voltages. Connectors, contacts, and charging pins must combine excellent electrical conductivity with the mechanical strength required for repeated mating cycles. High-machinability tellurium copper (C14500) provides the properties needed to manufacture these contacts efficiently while maintaining high conductivity (>85% IACS).
5G communication hardware operates at high frequencies, requiring components with close dimensional tolerances and low return losses. Coaxial connectors and RF components must be machined cleanly without burrs. The high machinability of our sulfur and tellurium coppers allows for precise machining directly on the lathe, eliminating the need for manual deburring processes.
Gas nozzles and electrode holders in laser and plasma cutting systems are subject to high thermal loads and electrical wear. These consumable parts require high concentricity to maintain stable arc dynamics. Our tellurium copper provides the thermal conductivity needed for heat dissipation along with the machinability required to make high-volume production viable.
High-power relays, switches, and distribution blocks in battery storage systems require low contact resistance to prevent overheating. High-conductivity, oxygen-free copper and specialized alloys provide structural stability and long-term reliability under variable thermal cycles.
Our production facilities and metallurgical processes are certified to meet international standards for quality, environment, and industrial compliance.
Common technical questions regarding the machinability, properties, and applications of specialized copper alloys.
View our broader selection of high-conductivity materials, high-strength structural alloys, and specialized formulations built to handle complex industrial challenges.
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to focus on 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!
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