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In the rapidly evolving landscape of advanced electrical engineering, the demand for materials that balance high electrical conductivity with rapid machining capabilities has reached unprecedented heights. UNS C18700 Leaded Copper, also widely classified as free-cutting copper, has emerged as the premier material solution for high-frequency electrical connectors, switch gears, and automated precision screw machine parts. Unlike pure ETP copper (C11000), which suffers from poor machinability due to its soft and gummy nature, C18700 introduces lead content ranging from 0.8% to 1.2% to serve as a micro-dispersed chip breaker.
As a leading global manufacturer, Sichuan Kepai New Material Co., Ltd. addresses this vital industrial intersection by delivering C18700 copper rods that combine optimized microstructures, high electrical conductivity of up to 96% IACS, and superior dimensional control. By implementing advanced continuous casting, extrusion, and cold drawing workflows, we ensure that the dispersion of lead particles is homogeneous, preventing tool wear and maximizing fabrication throughput for global procurement officers.
| Alloy Grade (UNS) | Copper content (%) | Principal Additives (%) | Electrical Cond. (% IACS) | Machinability Rating | Key Industrial Applications |
|---|---|---|---|---|---|
| C18700 (Leaded Copper) | 99.0 Min | Pb: 0.8 - 1.2% | 96% | 85 | Automated lathe components, electrical connectors, electrical pins |
| C14500 (Tellurium Copper) | 99.5 Min | Te: 0.4 - 0.7%, P: 0.007% | 93% - 98% | 85 | Plasma cutting tips, high-amperage connectors, EV charging terminals |
| C14700 (Sulfur Copper) | 99.0 Min | S: 0.2 - 0.5% | 95% | 85 | Precision screw machine parts, terminals, gas nozzles |
| C11000 (ETP Copper) | 99.9 Min | O: 0.04% | 101% | 20 | Bus bars, transformer windings, electrical conductors |
The international supply chain is shifting towards stricter compliance frameworks, energy efficiency, and higher productivity. When purchasing C18700 copper rods, global engineering teams look for reliable manufacturer partners capable of providing extensive documentation and consistent mechanical performance. The primary global demand drivers include:
Coaxial connectors, micro-connectors, and RF components rely heavily on C18700 due to its capability of holding extremely tight dimensional tolerances and its exceptional signal transfer stability.
High-voltage relays, battery connectors, and sensor pins require structural stability and superior heat dissipation, which are primary attributes of Kepai's optimized C18700 copper alloys.
Industrial automation utilizes C18700 rods for miniature electrical contact blocks and power transmission connectors, minimizing machine downtime during mass production runs.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. Currently, the factory covers an area of approximately 9,000 square meters, with 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 mainly applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
Located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, Kepai enjoys a superior geographical location and convenient transportation, which lays a solid foundation for the rapid development of the enterprise. Since its establishment, Kepai has adhered to the business philosophy of "innovation-driven development, quality wins the market," committed to providing customers with the highest quality high-end copper alloy materials, and promoting industrial upgrading and sustainable development.
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 production processes comply with leading international quality management and chemical composition testing standards.
We control every single parameter from material smelting to the final chemical composition test using advanced precision apparatus.
As a forward-looking copper rod manufacturer, Sichuan Kepai is committed to advancing metallurgical technology to meet the strict demands of the future. The optimization roadmap for C18700 and strategic copper alloys focus on:
Refining the grain size of the copper matrix to guarantee that the lead particles remain evenly dispersed, preventing structural macro-segregation and ensuring consistent conductivity.
Investigating clean manufacturing methods and drawing lubricants that prevent trace element contamination during the final heat-treatment stages.
Employing automatic laser-controlled straightening setups to fulfill the rigorous demands of high-rpm automatic Swiss lathe machining.
Developing lead-free high-conductivity copper variants that comply with the strictest long-term global environmental directives (such as RoHS and REACH exemptions update plans).
Sichuan Kepai maintains a highly robust global logistics network to support manufacturers and distributors across North America, Europe, Southeast Asia, and South America. Leveraging our industrial site in Guanghan, Sichuan, we offer direct rail, road, and maritime logistics configurations to expedite port delivery.
Each C18700 batch is shipped with complete traceability documents, including Mill Test Certifications (MTC) stating the chemical composition limits, physical property test logs (tensile strength, elongation, and electrical conductivity calculations), and RoHS compliance documentation. Our tech support team offers remote and on-site assistance to optimize machine speeds, tool geometries, and feed parameters to maximize C18700 efficiency on your factory floor.
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!
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