Explore our top industrial-grade, precision-manufactured raw materials optimized for high-efficiency turning, stamping, and electrical applications.
UNS C14500 Tellurium Copper (commonly designated as CuTe, copper-tellurium, or free-machining copper) is an advanced copper-based alloy engineered specifically to bridge the gap between high electrical conductivity and ease of mechanical processing. Standard copper alloys, such as oxygen-free copper (C10200) or electrolytic tough pitch copper (C11000), exhibit superb electrical and thermal transmission capabilities but present critical hurdles during high-speed CNC turning and Swiss-screw machining operations due to their high ductility and "gummy" behavior, which generates continuous, stringy chips and accelerated tool wear.
By precisely introducing 0.4% to 0.7% tellurium (Te) alongside a controlled trace concentration of phosphorus (P), C14500 achieves a microstructure that features uniformly dispersed copper telluride particles. These particles function as microscopic chip-breakers and natural lubricants within the copper matrix. As a direct consequence, C14500 attains a machinability rating of approximately 85% (referenced against Free-Cutting Brass UNS C36000 at 100%), while retaining an exceptional electrical conductivity of 90% to 98% IACS (International Annealed Copper Standard).
In the competitive landscapes of thermal management, electronics, and automotive engineering, selecting C14500 provides clear performance and cost benefits:
| Element / Parameter | Composition Percentage / Limit | Physical / Mechanical Property | Typical Value |
|---|---|---|---|
| Copper (Cu + Ag) | Min 99.3% | Density | 8.94 g/cm³ (0.323 lb/in³) |
| Tellurium (Te) | 0.40% - 0.70% | Electrical Conductivity | 93% - 98% IACS |
| Phosphorus (P) | 0.004% - 0.012% | Thermal Conductivity | 355 W/(m·K) (at 20°C) |
| Other Impurities | Max 0.1% total | Elastic Modulus | 117 GPa (17,000 ksi) |
Understanding user intent, technical pain points, and cross-border logistics challenges for industrial metal sourcing.
OEM buyers frequently struggle with unpredictable lead times for specialty alloys. As a vertically integrated manufacturer, Sichuan Kepai maintains comprehensive raw material buffers, guaranteeing steady export schedules across North America, Europe, and Southeast Asia.
Cross-border engineering projects demand exact standard matching. We supply C14500 tellurium copper manufactured in full compliance with ASTM B301, ASTM B124, DIN EN 12164, and JIS H3250 regulatory frameworks, easing structural validation.
Whether you require precision-drawn round bars, hexagonal profiles, wire coils, or customized sheets for stamping, our manufacturing facility supports multiple extrusion dimensions, minimizing local material waste.
A premier high-tech enterprise dedicated to research, development, production, and sales of high-performance copper alloys.
Established in 2017, Sichuan Kepai New Materials Co., Ltd. is a specialized 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 boasts a superior geographical location and convenient transportation, which lays a solid foundation for the rapid development of the enterprise.
How we maintain product reliability and performance metrics through rigorous testing and state-of-the-art machinery.
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.
Ensuring full regulatory and localized logistical alignments for global industrial integrations.
Operating as an international copper exporter involves more than raw production; it requires strict adherence to environmental regulations and regional specifications. Our C14500 Tellurium Copper rods and customized shapes are fully compliant with RoHS and REACH standards. This compliance ensures that electrical components integrated into EU and North American assembly lines meet all hazardous substance limitations.
Additionally, Sichuan Kepai offers customized packaging methods designed to prevent oxidation during maritime transport. Every shipment is tracked and supported by complete Mill Test Certificates (MTC), which verify chemical composition (tellurium, copper, phosphorus content) and physical properties (hardness, electrical conductivity IACS).
Corporate Certifications: We are backed by international quality management frameworks that confirm our status as a qualified supplier for Fortune 500 electronics and automotive clients. Our continuous testing protocols guarantee that our raw materials perform reliably under demanding manufacturing conditions.
Advancing metallurgical R&D to meet the needs of next-generation power electronics and manufacturing systems.
Traditional tellurium copper contains trace oxygen levels that can lead to micro-voids during welding or brazing. Our current development focus is on scaling up the production of **Oxygen-Free Tellurium Copper (OFT)**. This advanced grade keeps oxygen levels under 10 ppm, which helps prevent hydrogen embrittlement while maintaining high machinability and conductivity.
For applications in 5G and high-frequency communication relays, we are developing micro-alloyed copper materials. These alloys are designed to provide improved mechanical strength and fatigue resistance while maintaining high electrical performance, helping to extend component life under rapid switching cycles.
As part of our commitment to sustainable development, Sichuan Kepai is upgrading its smelting facilities. Our goal is to reduce carbon emissions and optimize material recycling processes. Implementing energy-efficient induction furnaces and waste-heat recovery systems helps us minimize environmental impact while maintaining competitive manufacturing costs.
Answers to common technical, manufacturing, and procurement questions regarding UNS C14500 Tellurium Copper.
Our specialized alloy selections designed for high conductivity, durability, and reliable manufacturing performance.
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