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Precision-engineered copper alloy materials delivering unmatched conductivity and structural integrity for aerospace and high-tech applications.
Oxygen Free Copper (OFC) bar — typically classified as C10100 (OFE) or C10200 (OF) — is defined by its oxygen content of less than 0.001% and copper purity exceeding 99.95%. In the context of aerospace engineering, this purity specification is not merely a preference but a strict engineering mandate. Even trace levels of oxygen can trigger micro-porosity, embrittlement, and hydrogen embrittlement in high-temperature brazing environments, directly compromising structural integrity and electrical performance in mission-critical systems.
Aerospace structures demand materials that can endure extreme thermal cycling, vacuum conditions, mechanical vibration, and electromagnetic interference simultaneously. Oxygen Free Copper bar fulfills all these requirements: its electrical conductivity reaches up to 101% IACS, thermal conductivity exceeds 390 W/m·K, and its ultra-smooth grain structure resists fatigue cracking under cyclic stress — properties that standard copper grades simply cannot match.
From satellite wiring harnesses and rocket propulsion bus bars to avionics enclosures and RF waveguide components, OFC bar has become an indispensable material in modern aerospace manufacturing supply chains worldwide.
Oxygen Free Copper Bar for aerospace engineering must meet rigorous standards including ASTM B187, EN 13599, and MIL-SPEC copper requirements. With oxygen content below 0.001% and purity ≥ 99.95%, these bars deliver the electrical, thermal, and mechanical performance that modern aerospace systems demand — from low-Earth orbit satellites to supersonic propulsion platforms.
Achieving up to 101% IACS, OFC bars ensure minimal resistive losses in power distribution bus bars, connector pins, and electrical harness routing throughout launch vehicles and spacecraft.
With thermal conductivity exceeding 390 W/m·K, OFC is the preferred heat-spreader and cold-plate material in avionics, radar electronics, and satellite power conditioning units operating in extreme temperature ranges.
The near-zero oxygen content eliminates blistering and porosity during vacuum or hydrogen-atmosphere brazing — a critical advantage when assembling waveguides, heat exchangers, and rocket engine manifolds.
OFC bars maintain surface integrity under humid, saline, and UV-exposed conditions encountered during pre-launch, ground handling, and orbital operations, reducing maintenance costs significantly.
The refined grain structure of oxygen-free copper allows tight-tolerance CNC machining, deep drawing, and precision bending — ideal for complex aerospace connector bodies and structural brackets.
High-purity OFC bar provides superior electromagnetic shielding effectiveness, protecting sensitive avionics, flight control computers, and communication equipment from RF interference in dense electronic environments.
The aerospace copper alloy market is undergoing accelerated growth driven by new-generation launch vehicles, commercial space stations, and next-generation satellite constellations.
According to recent industry analyses, the global aerospace copper alloy market is projected to surpass USD 4.2 billion by 2028, with oxygen-free copper products representing a growing share due to the proliferation of low-Earth orbit (LEO) satellite constellations operated by companies such as SpaceX Starlink, Amazon Kuiper, and OneWeb. Each satellite in these mega-constellations requires precise, lightweight, high-conductivity copper components — and OFC bar is central to that architecture.
On the defense side, hypersonic vehicle programs, directed-energy weapon systems, and next-generation fighter aircraft avionics are all driving unprecedented demand for OFC bars and profiles. Military procurement specifications in the US, Europe, and Asia increasingly mandate oxygen-free copper for power bus systems, grounding straps, and electronic warfare equipment.
China's aerospace sector — supported by programs under CASC, CASIC, and a thriving commercial space ecosystem — is one of the fastest-growing end markets. Chinese copper alloy producers like Sichuan Kepai New Material Co., Ltd. are well-positioned to serve this demand with domestic high-quality OFC solutions, reducing dependence on imported aerospace materials and aligning with national strategic objectives.
Electrification of Propulsion Systems: As electric propulsion (ion thrusters, Hall-effect thrusters) becomes mainstream for satellite station-keeping and deep-space missions, high-conductivity OFC bar plays a pivotal role in power processing units and discharge chamber components.
Additive Manufacturing Integration: Advanced aerospace OEMs are exploring OFC-derived copper powders and wire feedstocks for metal 3D printing of complex cooling channels, antenna mounts, and RF housings — expanding the design freedom and material efficiency of oxygen-free copper.
Miniaturization & Weight Reduction: The trend toward CubeSats and microsatellites demands thinner, lighter OFC bar profiles with no compromise on conductivity. Precision cold-drawing and rolling processes are enabling wall thicknesses below 0.5 mm while maintaining full OFE purity certification.
Green Manufacturing Compliance: Environmental regulations are pushing aerospace manufacturers to adopt lead-free, RoHS-compliant copper solutions. OFC bar — inherently free of hazardous additives — aligns perfectly with sustainable aerospace manufacturing goals.
In geostationary and LEO satellites, OFC bus bars carry high currents between solar arrays, batteries, and payload electronics. The near-zero oxygen content prevents internal oxidation during thermal vacuum testing and on-orbit temperature cycling between -180°C and +120°C.
Regenerative cooling channels in liquid rocket engines use OFC bar as the primary structural and thermal material. Its outstanding thermal conductivity rapidly dissipates combustion chamber heat, while its hydrogen compatibility prevents embrittlement in LOX/LH2 propellant environments.
OFC bar is machined into rectangular and circular waveguide sections for radar, telemetry, and communications systems. The ultra-smooth, pore-free interior surfaces minimize insertion loss and signal reflection — critical for deep-space communication links and missile guidance systems.
Commercial and military aircraft use OFC grounding strips and shielding bars throughout their airframes to ensure EMI compliance and safe dissipation of lightning strike energy. OFC's corrosion resistance ensures reliable performance across the 20–30 year service life of modern aircraft.
Ion and Hall-effect thrusters require high-voltage, high-efficiency power processing units (PPUs). OFC bar conductors in these units minimize resistive losses and thermal hotspots, extending the operational life of electric propulsion systems on telecommunications and Earth-observation satellites.
High-purity OFC windings are used in aerospace-grade solenoid valves, actuators, and magnetic bearing systems where electrical efficiency and low heat generation are paramount — including fuel valve systems in launch vehicles and attitude control thrusters.
The global space economy is forecast to reach USD 1 trillion by 2040. With thousands of commercial satellites planned for deployment, demand for certified OFC bar in connector, harness, and waveguide applications will grow exponentially over the next decade.
Research into micro-alloyed oxygen-free copper — incorporating trace silver, zirconium, or chromium — is producing OFC variants with 30–50% higher tensile strength while preserving 95%+ IACS conductivity, opening new structural application possibilities in aerospace.
Governments worldwide are pushing aerospace OEMs to localize critical material supply chains. Chinese producers like Kepai are investing in OFC bar production aligned with GB/T 26290 and AMS specifications, qualifying as Tier-1 aerospace material suppliers domestically.
Advanced scrap recovery and electrolytic refining technologies are enabling aerospace-grade OFC to be produced from recycled copper with ≥ 99.97% purity — meeting both cost-reduction and carbon-neutral manufacturing targets set by major aerospace primes.
Sichuan Kepai New Material Co., Ltd.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a 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. The products are mainly applied in high-tech fields such as new energy vehicles, 5G technology, laser cutting, and lithium battery relays.
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.
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.
Smelting
laying-off
extrusion
drawing
straightening
package
eddy current conductance instrument
Chemical composition test room
Metallographic sample polishing machine
Microcomputer controlled electro-hydraulic servo universal testing machine
Liquid crystal display electronic universal testing machine
Hardness tester
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!
