In the rapidly advancing landscape of global high-precision manufacturing, material science acts as the cornerstone of innovation. Among high-performance copper alloys, Tellurium Copper (UNS C14500 / CuTe) has emerged as an irreplaceable material. It bridges the historical gap between high electrical conductivity and superior machinability.
Historically, design engineers faced a strict trade-off: pure copper (such as C11000) offers exceptional electrical conductivity (100% IACS) but is notoriously difficult to machine due to its gummy nature, leading to rapid tool wear and poor surface finishes. Conversely, free-machining brasses offer excellent machinability but suffer from significantly lower conductivity (typically 25-28% IACS). Tellurium copper solves this engineering dilemma by maintaining 93% to 98% IACS electrical conductivity while providing a machinability rating of 85% relative to free-cutting brass.
This unique synergy is achieved through the precise addition of 0.4% to 0.7% tellurium. The tellurium forms microscopic, uniformly dispersed copper telluride (Cu2Te) precipitates within the copper matrix. These precipitates act as highly effective chip breakers during machining operations, dramatically reducing friction, lowering cutting temperatures, and enabling high-speed automated production without compromising the material's core electrical and thermal properties.
Focus on high conductivity and high strength free cutting tellurium copper and other copper alloys.
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech private enterprise specializing in the research, development, production, and sales of high-conductivity, high-strength free-cutting tellurium copper and other special copper alloys. Operating from our state-of-the-art 29,000 square meter manufacturing facility, Kepai has positioned itself as a premier global supplier of advanced copper alloy solutions.
Our core mission is to deliver high-performance, environmentally sustainable materials that meet the rigorous demands of modern industries, including electric vehicles, aerospace, medical technology, and high-power electrical engineering. Through relentless innovation and strict adherence to international quality standards, we have built a reputation for reliability and excellence across both domestic and international markets.
The global demand for high-performance conductive materials is experiencing unprecedented growth, driven by the electrification of transportation, the expansion of renewable energy grids, and the rise of smart manufacturing.
The transition to electric vehicles (EVs) has created a massive demand for materials capable of handling high currents with minimal thermal loss. Tellurium copper is widely utilized in EV charging pins, high-voltage connectors, and battery terminal components, ensuring rapid charging times and high operational safety.
In automated CNC machining centers, production efficiency is directly linked to material machinability. Tellurium copper allows for higher cutting speeds, longer tool life, and superior surface finish, reducing downtime and overall manufacturing costs for precision component manufacturers worldwide.
As solar and wind power installations scale globally, the need for highly efficient electrical switches, power distribution blocks, and connectors has surged. C14500 tellurium copper provides the necessary electrical conductivity and corrosion resistance to guarantee long-term reliability in harsh outdoor environments.
Sichuan Kepai New Materials leverages China's highly integrated industrial ecosystem to offer unparalleled manufacturing efficiency and cost-effectiveness. Our production capabilities are built on advanced technology, strict quality control, and optimized supply chains.
Unlike many Western manufacturers, Kepai controls the entire production process—from raw material melting and alloying to extrusion, drawing, and final precision finishing. This vertical integration allows us to:
Our high-performance copper alloys are engineered to excel in the most demanding operational environments across diverse global industries.
Leveraging copper's natural antimicrobial properties and high thermal conductivity, our alloys are used in advanced medical imaging systems, surgical instruments, and high-reliability connectors for life-support systems.
Providing the backbone for EV charging infrastructure. Our tellurium copper charging pins handle high currents with minimal temperature rise, ensuring safe, rapid energy transfer in DC fast-charging stations.
Engineered for extreme reliability. Used in high-performance generators, instrumentation wiring, and critical data transmission connectors where failure is not an option.
Our specialized copper alloys offer exceptional resistance to seawater corrosion and marine biological fouling, making them ideal for offshore platforms, subsea cabling, and marine instrumentation.
Tellurium copper is the industry standard for plasma cutting electrodes and welding torch nozzles. Its high thermal conductivity rapidly dissipates heat, extending consumable life and maintaining arc stability.
Essential for high-capacity battery storage systems and solar inverters, ensuring highly efficient power conversion and minimal energy loss across the entire system architecture.
At Sichuan Kepai, innovation is not just a department—it is our core competitive advantage. We continuously push the boundaries of copper metallurgy to meet the evolving demands of global high-tech industries.
Our company has established its own independent R&D team, equipped with a complete production system and mature production technology. This allows us to have deep knowledge in the production of high-conductivity, high-strength copper alloys.
In addition to the production of traditional copper alloys, we have also developed a new type of highly conductive oxygen-free tellurium copper. Compared with traditional copper tellurium, this material has lower oxygen content and superior electrical performance.
Our company has passed ISO9001:2015, ISO14001:2015, and OHSAS 45001:2018 certifications, reflecting our international standards in quality management, environmental protection, and occupational health and safety.
We continue to innovate in the development and production of tellurium copper alloy materials, actively participating in the formulation of relevant industry standards, which enhances our market authority and technical leadership.
Our company focuses on environmental protection and sustainable development. Through the use of environmentally friendly, free-cutting copper alloys, we reduce the ecological impact of high-precision manufacturing.
Our metallurgical engineers are ready to collaborate on your specific project requirements.
Contact Our R&D TeamFor procurement officers and supply chain directors, sourcing high-quality tellurium copper requires a deep understanding of both chemical composition and mechanical properties. Substandard alloys can lead to catastrophic tool breakage during high-speed CNC machining or electrical failure due to excessive resistance.
| Property / Element | Standard Value (ASTM B301) | Kepai Premium Standard |
|---|---|---|
| Copper (Cu + Ag) | Min 99.20% | Min 99.40% |
| Tellurium (Te) | 0.40% - 0.70% | 0.45% - 0.65% (Optimized for Machining) |
| Phosphorus (P) | 0.004% - 0.012% | 0.005% - 0.009% (Deoxidized) |
| Electrical Conductivity | Min 90% IACS | 93% - 98% IACS |
| Machinability Rating | 85% (Relative to C36000 Brass) | 85% - 90% (Reduced Tool Wear) |
By choosing Sichuan Kepai, global buyers gain access to a reliable, ISO-certified manufacturer capable of delivering consistent metallurgical properties batch after batch. Our strict quality control protocols ensure that every shipment conforms to ASTM B301, EN 12164, and other major international standards.
Get authoritative answers to the most common technical and commercial questions regarding tellurium copper sourcing and application.
Looking for a highly reliable, high-volume tellurium copper manufacturer? Contact our engineering and sales team today to discuss technical specifications, custom profiles, volume pricing, and global logistics.
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