Explore our premium selection of high-conductivity, high-strength copper alloys engineered for demanding industrial environments.
A comprehensive technical analysis of why Tellurium Copper is replacing traditional pure copper in next-generation high-precision manufacturing.
Tellurium Copper (designated as UNS C14500 or CuTe) represents a major metallurgical breakthrough that bridges the gap between high electrical conductivity and superior machinability. Traditional pure copper (such as C11000) boasts exceptional electrical conductivity (100% IACS) but suffers from notoriously poor machinability (only 20% of free-cutting brass). This makes the high-speed production of intricate, high-tolerance components exceptionally difficult, leading to rapid tool wear, burr formation, and high production costs.
By precisely alloying copper with a minute addition of tellurium (typically 0.4% to 0.7%), metallurgists create a material that retains 90% to 96% IACS electrical conductivity and 93% thermal conductivity, while boosting the machinability rating to an impressive 85%. The tellurium forms microscopic copper telluride (Cu2Te) stringers uniformly dispersed throughout the copper matrix. These stringers act as natural chip breakers, allowing for high-speed CNC machining, clean cuts, and minimal tool friction.
Maintains 90% - 96% IACS electrical conductivity, crucial for high-current applications such as EV charging connectors and power distribution blocks.
Enables ultra-fast CNC machining speeds, reduces cycle times, dramatically extends cutting tool life, and ensures exceptional surface finishes without burrs.
Unlike standard copper, Kepai's proprietary oxygen-free tellurium copper exhibits outstanding resistance to hydrogen embrittlement during high-temperature brazing or welding.
A world-class high-tech enterprise specializing in the R&D, production, and global distribution of advanced copper alloys.
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. operates a state-of-the-art 29,000 square meter manufacturing facility. We specialize in the research, development, and high-volume production of high-conductivity, high-strength free-cutting tellurium copper, sulfur copper, beryllium copper, and other specialized high-performance copper alloys.
Through continuous technological innovation, Kepai has developed a proprietary line of Oxygen-Free High-Conductivity (OFHC) Tellurium Copper. This advanced material features exceptionally low oxygen levels (under 10ppm) while maintaining uniform tellurium dispersion, solving the industry-wide challenge of balancing weldability with high machinability.
Our products are widely exported to key industrial hubs across North America, Europe, East Asia, and Southeast Asia, earning an outstanding reputation for quality, consistency, and technical support.
How Sichuan Kepai leverages regional resource abundance, advanced manufacturing scale, and rigorous quality control to deliver unmatched value.
Sichuan Province is rich in mineral resources, providing Kepai with direct, stable access to high-purity copper cathode and tellurium. This geographic advantage minimizes raw material transportation costs and shields our global clients from volatile market fluctuations, ensuring highly competitive and stable pricing structures.
Unlike many suppliers who outsource key manufacturing steps, Kepai operates a fully integrated production line. From vacuum induction melting, continuous casting, and hot extrusion to cold drawing, precision straightening, and non-destructive eddy current testing, every step is performed in-house. This vertical integration guarantees 100% traceability and rigorous quality control at every stage of production.
Global enterprises require tailored solutions. Kepai's dedicated R&D team works closely with procurement managers to customize alloy compositions, temper states (half-hard, hard, extra-hard), and dimensional profiles (round bars, hexagonal rods, sheets, wires, and custom extruded shapes). We offer rapid prototyping to accelerate your product development cycles.
We understand that international procurement demands absolute compliance. Sichuan Kepai is certified under ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety). All our materials strictly comply with RoHS and REACH regulations, ensuring seamless integration into your global supply chain.
High-performance copper alloys are the backbone of modern high-tech industries. Discover where Kepai's materials make a critical difference.
High-current EV charging gun contacts, battery terminal connectors, and high-voltage distribution components requiring low contact resistance and high wear resistance.
High-reliability electrical connectors, sensor housings, and data transmission components engineered to withstand extreme temperatures and vibration.
Precision-machined components for MRI machines, diagnostic equipment, and antimicrobial surfaces leveraging copper's natural biocide properties.
Corrosion-resistant copper-nickel and bronze alloys designed to resist marine biofouling and harsh saltwater environments.
High-durability plasma cutting electrodes, gas nozzles, and welding torch tips requiring exceptional thermal conductivity and arc erosion resistance.
Photovoltaic ribbon connectors, solar inverter terminals, and grid-scale battery storage busbars engineered for maximum efficiency.
Our diverse portfolio of high-performance copper alloys is engineered to meet the stringent demands of global high-tech industries.
C19160 (CuNiSiCr) is a high-performance nickel-silicon precipitation strengthened copper alloy. Strengthened through advanced heat treatment, it possesses high strength, excellent electrical conductivity, and outstanding softening resistance, making it ideal for heavy-duty connectors and automotive terminals.
C26000 is an engineering material that achieves a perfect balance of excellent cold forming properties, good comprehensive mechanical properties, and moderate cost. It is particularly suitable for manufacturing parts requiring complex deep drawing, stretching, bending, and cold heading.
C51100 is a typical tin-phosphorus bronze (CuSn4) and a high-performance elastic copper alloy. The addition of tin enhances strength, wear resistance, and corrosion resistance, while phosphorus acts as a deoxidizer to improve fatigue resistance and elasticity.
C54400 features excellent strength, wear resistance, corrosion resistance, and good elastic properties. Infused with lead to provide outstanding machinability, it is widely used for miniature bearings, bushings, gear shafts, and high-reliability spring contacts.
C17200 beryllium bronze foil is a precipitation-hardening copper alloy with extremely high strength and excellent elastic properties. It is widely used in high-end electronic connectors, precision spring clips, diaphragm bellows, and highly reliable conductive springs.
C14700 sulfur copper is a sulfur-containing, free-cutting copper alloy known for its excellent processability and high electrical conductivity. It serves as a highly efficient alternative to tellurium copper in applications where high-speed machining and excellent electrical properties are required.
Our commitment to E-E-A-T principles is demonstrated through our rigorous testing protocols, international certifications, and industry-leading R&D.
Sichuan Kepai is fully certified under ISO 9001:2015, ISO 14001:2015, and OHSAS 18001 / ISO 45001:2018. Our manufacturing processes strictly adhere to global environmental and safety standards.
We utilize state-of-the-art testing equipment, including direct-reading spectrometers, metallographic microscopes, eddy current conductivity meters, and universal tensile testing machines to ensure zero-defect quality.
We actively develop lead-free and low-lead copper alloy alternatives to meet the evolving global environmental regulations (RoHS/REACH), helping our clients achieve their sustainability goals.
Kepai's Global Market Distribution: Exporting high-performance copper alloys to over 30 countries.
Get authoritative answers to the most common technical and procurement questions regarding Tellurium Copper and specialized copper alloys.
High-performance materials engineered to elevate your manufacturing efficiency and product reliability.
Contact Sichuan Kepai today for technical consultations, custom alloy configurations, and competitive volume pricing.
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