Oxygen-Free High-Conductivity (OFHC) copper, classified under ASTM designations C10100 and C10200, represents the pinnacle of thermal and electrical conductivity engineering. Produced through direct conversion of selected refined cathodes and cast under strictly controlled, oxygen-reducing atmospheres, OFHC copper limits maximum oxygen content to less than 0.001% (10 ppm). This ultra-low oxygen density is vital for preventing the phenomenon of hydrogen embrittlement when copper components are subjected to high-temperature welding or annealing.
Unlike standard Electrolytic Tough Pitch (ETP) copper (which contains up to 0.04% oxygen in the form of cuprous oxide), OFHC copper displays superior structural homogeneity and an electrical conductivity rating of at least 101% IACS (International Annealed Copper Standard). In critical vacuum systems, aerospace propulsion, cryogenic chambers, and power distribution systems, the absence of volatile elements under high-vacuum conditions establishes OFHC copper as the only viable engineering standard.
As a global OEM OFHC copper rod factory, Sichuan Kepai New Material Co., Ltd. implements advanced horizontal continuous casting and precise micro-alloying techniques. Our material ensures optimal ductility, corrosion resistance, and high-impact strength, minimizing structural failures in automated assembly lines and critical high-power networks.
Sichuan Kepai New Material Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales. We are dedicated to providing global industrial markets with high-end, strategic new materials aligned with advanced manufacturing standards.
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.
Our manufacturing scope primarily encompasses the production of strategic emerging new materials for national high-end industry development strategies, including special copper alloys such as tellurium copper, high-conductivity oxygen-free copper, silver copper, and dispersion copper. Additionally, we focus heavily on the research and development of high-conductivity, easy-to-machine, high-strength copper alloys. The resulting products are applied in high-tech fields including new energy vehicles (NEV), 5G telecommunications, laser cutting, aerospace, and high-current relays.
The global push for carbon neutrality is driving unprecedented demand for OFHC copper rods in EV drivetrains, charging infrastructures, and high-efficiency transformers. Clean energy transit systems depend on pure copper elements to sustain massive current densities without overheating.
As millimeter-wave technologies roll out, signal integrity is highly sensitive to impurity-induced attenuation. Oxygen-free high-conductivity copper minimizes skin-effect resistance in coaxial cables, waveguides, and micro-connectors, enabling flawless data transmission.
In outer space and deep research chambers, materials operate under extreme vacuum conditions. OFHC copper prevents outgassing and handles thermal stress efficiently, making it the premier choice for cryogenic heat exchangers, RF cavities, and particle accelerators.
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.
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.
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.
From regional electricity distribution grids to precision manufacturing cells, OFHC copper rods are vital in optimizing power delivery, mechanical processing reliability, and high-frequency wave handling.
In North America, local EV battery pack manufacturing plants use Kepai's ultra-purified copper rods to assemble thick traction busbars and high-capacity electrical connectors. High ductility allows precision bending and hydroforming without mechanical fracturing.
European advanced machinery manufacturers rely on ASTM B170 Grade 1 copper for high-vacuum chamber seals, specialized switchgears, and medical imaging components. The lack of trace impurities prevents weld cracking during vacuum sealing processes.
As a prime hub for consumer electronics, factories in East Asia employ high-purity copper rods for micro-wire drawing, fine-pitch semiconductors, and antenna leads. Excellent grain uniformity yields stable performance at high operational temperatures.
To help engineering teams select the appropriate grade of copper for their precise applications, our R&D department has mapped out the chemical and physical differences across the primary copper configurations processed in our factory.
| Material Class | Common UNS Alloy Code | Nominal Conductivity (% IACS) | Oxygen Content Limit (ppm) | Core Application Benefit |
|---|---|---|---|---|
| OFHC Copper | UNS C10100 / C10200 | ≥ 101% | < 10 ppm (0.001%) | No hydrogen embrittlement, ideal for vacuum and high-temp welding. |
| ETP Copper | UNS C11000 | ≥ 100% | 200 - 400 ppm (0.02%-0.04%) | Cost-effective standard wiring, but prone to embrittlement. |
| Tellurium Copper | UNS C14500 | ≥ 93% | Trace levels | High machinability (85% rating), ideal for plasma nozzles & connectors. |
| Chromium Zirconium | UNS C18150 | ≥ 80% | N/A | High strength at elevated temperatures, perfect for spot welding electrodes. |
Our factory utilizes advanced technology and testing equipment to manage every production stage—from smelting to final microstructural inspection—ensuring strict quality control for all copper rods shipped globally.
Our production processes and materials are audited and certified to meet international aerospace, automotive, and industrial environmental standards.
Explore essential technical details regarding OFHC copper rods, manufacturing tolerances, material properties, and procurement guidelines.
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