Engineered for extreme wear resistance, micro-machining accuracy, and superior electrical and thermal conductivity.
Analyzing current production paradigms, metallurgical advantages, and structural demands across global supply lines.
In high-precision manufacturing, Lead Copper (commonly referred to in international alloy specifications under designations like C19110, C19150, or leaded bronzes such as C31400 and C34500) represents a pinnacle class of free-machining alloys. Lead, when metallurgically combined with copper, does not form a solid solution. Instead, it remains distributed as distinct, finely dispersed microscopic particles throughout the copper matrix. This structural characteristic acts as an internal lubricant and chip breaker during high-speed CNC turning and milling operations.
Currently, the global industrial consumption of lead copper remains robust in high-demand markets like automotive electrical connectors, fluid power systems, heating elements, and industrial sensor housings. Despite localized regulatory developments regarding heavy metals, leaded copper variants remain irreplaceable in applications where low friction, high wear resistance, and extreme machining efficiency must coexist with excellent electrical and thermal properties.
Across Europe, North America, and industrial Asia, procurement officers look for trusted manufacturers capable of maintaining strict compositional boundaries. Because lead behaves as a soft phase, uncontrolled distribution can compromise the mechanical integrity of structural components. Consequently, leading global companies rely on state-of-the-art continuous casting and precise cold-drawing procedures to ensure even dispersion of lead particles across the entire profile of rods, wires, and sheets.
The addition of lead reduces cutting resistance and tool wear, permitting feed rates up to 4 times higher than standard high-purity copper, minimizing surface roughness and production cycles.
Ideal for bearings, bushings, and slider assemblies. Dispersed lead creates a micro-film overlay under friction, preventing premature galling and mechanical seizing.
Unlike other alloying agents like iron or silicon, lead does not drastically degrade copper's fundamental electrical pathways, maintaining high IACS (International Annealed Copper Standard) values.
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.
Based in the highly active economic zone of southwest China, Kepai leverages vertical integration models from raw cathode refinement to terminal precision profile drawing. Our processing capabilities satisfy the strictest chemical purity thresholds demanded by global automotive, telecom, and defense procurement agents.
Balancing rapid industrial delivery with environmental responsibility and energy-efficient metallurgy.
The company is located in the western area of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, boasting 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.
As responsible stewards of metallurgy, we deploy closed-loop filtration systems for volatile particulate control and water-recycling cooling loops to minimize our ecological footprint. We are continually innovating to adapt to shifting environmental policies, ensuring our manufacturing practices remain clean, compliant, and future-proof.
A detailed look at why global enterprises choose Sichuan Kepai for specialized copper engineering.
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. By refining our extrusion tolerances and surface treatments, we save our partners hours of secondary finishing time.
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. Our global supply pipelines are secured via premium freight partners, assuring punctual delivery borders-wide.
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. By prioritizing occupational safety and internal metallurgical training, our team remains at the top tier of international materials engineering standards.
Where raw material performance translates into direct field operational advantages.
Coaxial connectors, RF pins, and internal structural filters within 5G base towers demand extremely clean machining profiles to prevent signal distortion (passive intermodulation - PIM). Free-machining lead copper prevents burrs that compromise high-frequency signal integrity.
High-amperage busbars, thermal connectors, and relays require components that can sustain heavy electrical cycles without localized heat spikes. Leaded copper and tellurium copper compositions provide the balance of structural rigidity and high IACS conductivity needed for automotive charging setups.
Within axial piston pumps, hydraulic motors, and industrial valves, the interfaces undergo constant dynamic friction. Leaded bronze and copper alloys serve as sacrificial plates and bushings, protecting expensive steel shafts from wear and galling.
Pioneering the next generation of free-machining alloys and ecological alternatives.
The industrial landscape for leaded copper is undergoing significant transitions. As global standardizations tighten environmental restrictions (such as Europe’s RoHS exemptions timeline and REACH regulations), metallurgists are developing high-performance alternatives. Our R&D department at Sichuan Kepai is spearheading research into three primary pillars:
By investing in these technological avenues, Sichuan Kepai guarantees that our global business partners have access to a reliable, forward-compatible material supply. This preparation ensures that compliance modifications in the target market do not cause supply chain disruptions.
Leveraging domestic raw material access, integrated manufacturing, and geographical advantages.
Western and global OEM businesses face constant supply chain pressures, ranging from fluctuating energy costs to shipping bottlenecks. Sichuan Kepai offers a resilient alternative. Located in the highly optimized industrial zone of Sichuan, our factory operates with a combination of structural cost advantages and deep logistical integration:
Our high-precision manufacturing relies on cutting-edge production and testing systems.
Smelting
laying-off
extrusion
drawing
straightening
package
eddy current conductance instrument
Chemical composition test room
Metallographic sample polishing machine
Microcomputer controlled electro-hydraulic servo universal testing machine
Liquid crystal display electronic universal testing machine
Hardness tester
Our commitment to top-tier quality standards is validated by strict third-party inspections.
Providing technical answers for material engineers, procurement managers, and production supervisors.
Lead is immiscible in copper and forms tiny globules at the grain boundaries. During machining, these globules act as a natural lubricant that reduces friction at the tool interface. When the cutting tool meets the metal, these globules promote chip fragmentation (making short, manageable chips rather than long, stringy ones), lowering energy consumption and prolonging tool life. Because lead is localized in discrete pockets, the pure copper matrix retains its continuous electrical paths, maintaining high conductivity levels (typically above 90% IACS, depending on the exact alloy grade).
We comply fully with international frameworks. While leaded copper variants are permitted in several industrial and mechanical exceptions under RoHS, we actively produce alternative lines. For projects requiring lead-free materials, we supply high-performance Tellurium Copper (C14500) and Sulfur Copper (C14700). These materials offer similar chip-breaking actions and electrical characteristics without using restricted substances.
Sichuan Kepai operates an in-house testing facility equipped with Eddy Current Conductance Instruments to check conductivity, a dedicated Chemical Composition Test Room (using spectrographic analysis to check element distribution), and Microcomputer Controlled Universal Testing Machines to verify tensile strength, yield points, and elongation. Every batch shipped is traceable and accompanied by an official Material Test Report (MTR).
Yes. Our extrusion and cold-drawing lines can be configured to produce customer-specific geometries, including hexagonal rods, hollow tubes, sheets, and specialized profiles. Our technical team works directly with client engineers to optimize dimensions, minimizing scrap material during final CNC machining stages.
Engineered for high-stress applications, electronic assemblies, and specialized tooling systems.
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
