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Oxygen-Free High Conductivity (OFHC) copper, commonly designated as C10100 or C10200 depending on purity levels, represents the pinnacle of refined metallurgy. Engineered to exhibit minimal oxygen levels—generally under 10 parts per million (ppm) or 0.001%—this material is processed under strict vacuum conditions to prevent any atmospheric interaction. Eliminating oxygen dramatically mitigates the threat of hydrogen embrittlement, a critical structural risk occurring when copper is exposed to reducing gases at elevated temperatures during processes such as brazing or gas shielding welding.
In industrial electrical applications, the electrical performance of copper is evaluated based on the International Annealed Copper Standard (IACS). Standard electrolytic tough pitch (ETP) copper (such as C11000) achieves a base rating of 100% IACS. In contrast, premium oxygen-free materials from advanced manufacturers reach conductivity metrics of 101% to 102% IACS. This significant difference translates to reduced electrical resistance, minimized thermal dissipation losses, and heightened device efficiency.
It is not merely the absence of oxygen that defines high-conductivity copper, but the rigorous control of tracer elements. Trace amounts of specific impurities like phosphorus, arsenic, iron, or antimony drastically degrade electrical performance even at levels below 50 ppm. For instance, a microscopic concentration of 0.005% phosphorus can lower IACS value by over 10%. By utilizing raw cathode feedstock exceeding 99.99% purity, specialized companies ensure their products deliver consistent thermal conductivity exceeding 390 W/(m·K) and maintain operational stability at extremely high frequencies.
This high level of purity also facilitates superior ductility and formability, meaning these premium alloys can be drawn down into micro-fine wire or complex geometrical extrusions without fracturing or suffering from internal micro-tears, which is a major factor in manufacturing yield rates.
The international market for high-conductivity oxygen-free copper is undergoing a structural paradigm shift. Driven by clean energy transitions and digitalization projects, industrial procurement professionals are emphasizing supply security and materials science innovations over simple price-per-ton metrics.
Wind power generators, photovoltaic collectors, and ultra-high-voltage transmission networks demand massive quantities of heavy-gauge oxygen-free copper bars. High-conductivity alloys prevent power losses over huge spans of industrial operations, enhancing regional grid stability.
Electric vehicles function on high voltages ranging from 400V to 800V. EV relays, battery management systems, and high-frequency charging connectors require oxygen-free high-conductivity tellurium copper to manage instantaneous current surges without overheating.
High-power industrial laser systems, plasma cutting electrodes, and semiconductor packaging plants require copper with high thermal conductivity. Rapid heat extraction prevents critical components from failing prematurely under thermal stress.
| Alloy Grade | UNS Standard | Min. Conductivity (IACS) | Oxygen Content (ppm) | Key Properties | Primary Target Industry |
|---|---|---|---|---|---|
| Oxygen-Free Electronic (OFE) | C10100 | ≥ 101% | < 5 ppm | Excellent vacuum integrity, no hydrogen embrittlement. | Semiconductors, Aerospace, Audio Systems |
| Oxygen-Free (OF) | C10200 | ≥ 100% | < 10 ppm | Superior formability, outstanding electrical conductivity. | High Voltage Cables, Coaxial Cables, Busbars |
| Tellurium Copper (OFC-Te) | C14500 | ≥ 93% | < 10 ppm | Excellent machinability (85%), high electrical/thermal rating. | EV Relay Connectors, Plasma Cutting Nozzles |
| Electrolytic Tough Pitch (ETP) | C11000 | ≥ 100% | > 100-600 ppm | High conductivity, prone to embrittlement during welding. | General Electrical, Plumbing, Roofing |
Founded in 2017, Sichuan Kepai New Materials Co., Ltd. has grown into a leading developer of high-conductivity new materials in China. Located in the western area of the Sichuan Guanghan Industrial Development Zone near National Highway 108, our operations are supported by efficient transport infrastructure. With a factory footprint covering 9,000 square meters and modern offices spanning 1,000 square meters, Kepai specializes in developing advanced copper alloys in alignment with the national strategic direction for high-value manufacturing.
Our primary focus lies in the specialized development of high-performance, high-conductivity, easy-to-machine, and high-strength copper alloys. This product portfolio includes tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper, which serve industries including new energy vehicles, 5G and 6G infrastructure, laser cutting systems, and high-load lithium battery relays. At Kepai, technological innovation is core to our corporate value system. Our research and manufacturing teams are composed of industry experts dedicated to refining refining techniques, chemical configurations, and testing protocols.
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.
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.
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.
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.
Our production lines conform strictly to national and international standards. This rigorous system ensures that each batch delivers uniform physical properties, chemical composition, and conductivity.
Our manufacturing plant features modern production machinery and testing instrumentation to monitor quality at every process stage.
Explore detailed engineering insights answering frequently asked questions from procurement professionals and mechanical engineers.
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to focus on the research and application of advanced materials. We look forward to partnering with customers worldwide to drive technological and industrial progress. Get in touch with our team for material specifications and wholesale pricing.
Browse our extended portfolio of copper alloys, custom compounds, and specialized conductors designed for demanding industrial environments.
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