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Explore our high-performance copper alloy solutions engineered for aerospace and advanced industrial applications.
A premier chromium zirconium copper alloy redefining performance boundaries in aerospace engineering.
C18150, commonly referred to as Chromium Zirconium Copper (CrZrCu), is a precipitation-hardened copper alloy that combines an extraordinary balance of high electrical conductivity, exceptional thermal conductivity, and superior mechanical strength. Containing approximately 0.5–1.5% chromium and 0.03–0.3% zirconium, this alloy achieves properties that standard copper cannot match under the extreme conditions of aerospace environments.
The alloy's unique microstructure — formed through precise solution annealing and age-hardening processes — results in a fine dispersion of chromium and zirconium precipitates within the copper matrix. This precipitation hardening mechanism is what gives C18150 its remarkable ability to maintain high strength even at elevated temperatures exceeding 400°C, making it indispensable in aerospace propulsion systems, satellite components, and high-frequency communication equipment.
With an electrical conductivity typically reaching 75–85% IACS and tensile strength of 400–600 MPa, C18150 CrZrCu occupies a unique performance niche that no other copper alloy can easily replicate — delivering the conductivity of copper with the strength approaching that of structural alloys.
Aerospace systems demand materials that perform flawlessly under thermal cycling, high mechanical loads, and electromagnetic interference. C18150 CrZrCu meets these demands by offering unparalleled resistance to softening at high temperatures, outstanding fatigue life, and excellent weldability — properties that make it the preferred choice for rocket engine electrodes, spacecraft thermal management systems, and avionics connectors worldwide.
| Element | Content (%) | Role |
|---|---|---|
| Copper (Cu) | Bal. (~98.5%) | Base conductivity |
| Chromium (Cr) | 0.5 – 1.5% | Strength & hardness |
| Zirconium (Zr) | 0.03 – 0.3% | Thermal stability |
Six critical performance attributes that make C18150 the gold standard for aerospace-grade copper alloys.
Achieves 75–85% IACS, ensuring minimal energy loss in high-frequency aerospace electrical systems and power distribution networks.
Maintains structural integrity and mechanical strength at temperatures exceeding 400°C — critical for rocket nozzles and re-entry vehicle components.
Tensile strength of 400–600 MPa combined with 80–200 HV hardness, providing structural reliability in vibration-intensive aerospace environments.
Unlike many high-strength copper alloys, C18150 offers outstanding weldability and brazeability, simplifying aerospace component assembly.
The precipitation-hardened microstructure resists softening during thermal cycling, preserving performance throughout the aerospace component lifecycle.
Excellent machinability enables precision manufacturing of complex aerospace geometries including electrode tips, connectors, and heat sink fins.
From rocket propulsion to satellite systems — discover where C18150 makes the critical difference.
C18150 CrZrCu is the material of choice for resistance welding electrodes and plasma torch electrodes used in rocket engine manufacturing. Its ability to withstand repeated thermal shocks while maintaining dimensional accuracy directly impacts the quality of critical propulsion welds. Leading aerospace manufacturers in the US, EU, and China have standardized on CrZrCu electrodes for titanium alloy and nickel superalloy welding in engine assembly lines.
Satellites in low Earth orbit (LEO) experience extreme thermal cycling between -150°C and +120°C. C18150 CrZrCu's combination of high thermal conductivity (~320 W/m·K) and dimensional stability makes it ideal for heat spreaders, thermal straps, and interface plates in satellite thermal control systems, ensuring electronic payloads remain within operational temperature ranges throughout mission life.
Modern commercial and military aircraft rely on thousands of electrical connectors operating at high frequencies. C18150's superior conductivity and corrosion resistance make it the preferred base material for avionics connector pins, bus bars, and signal integrity components in fly-by-wire systems. Its performance in the 5G-compatible frequency ranges also makes it increasingly relevant for next-generation in-flight communication systems.
The dimensional stability of C18150 under cryogenic and vacuum conditions makes it suitable for precision optical mount components in space telescopes and Earth observation instruments. The alloy's low thermal expansion mismatch with adjacent structural materials reduces alignment drift, which is critical for maintaining sub-arcsecond pointing accuracy in scientific space missions.
Electric propulsion systems used in deep space missions and geostationary satellite station-keeping require materials that can withstand ion bombardment and high-temperature plasma environments. C18150 CrZrCu is increasingly being evaluated for ion thruster accelerator grids and neutralizer components, where its combination of erosion resistance and electrical performance offers significant mission life advantages over traditional refractory metals.
Beyond direct flight hardware, C18150 CrZrCu plays a crucial role in aerospace manufacturing tooling — specifically in EDM (Electrical Discharge Machining) electrodes used to machine complex turbine blade cooling channels and combustion chamber geometries. The alloy's wear resistance and thermal stability enable longer electrode life and tighter dimensional tolerances compared to conventional copper electrodes.
The global aerospace copper alloy market is accelerating — and C18150 is at the center of this growth.
The aerospace industry is evolving rapidly — and C18150 CrZrCu is evolving with it.
The rise of commercial space companies — SpaceX, Blue Origin, Rocket Lab, and dozens of new entrants — is dramatically increasing demand for high-performance copper alloys. C18150 CrZrCu is seeing growing adoption in reusable rocket engine components where the alloy's ability to withstand thousands of thermal cycles without degradation provides a decisive advantage in reducing per-launch costs.
The push toward hybrid-electric and fully electric aircraft is creating new demand for C18150 in high-power motor windings, inverter busbars, and battery interconnects. As aviation electrification scales from regional aircraft to narrow-body jets, the alloy's unique combination of conductivity and strength will become increasingly critical for meeting weight and performance targets.
Advanced computational materials science and AI-driven alloy design are enabling researchers to optimize C18150 microstructures with unprecedented precision. Machine learning models are being used to predict optimal heat treatment parameters, enabling manufacturers like Sichuan Kepai to produce C18150 with more consistent properties and tighter tolerances than ever before achievable through traditional trial-and-error methods.
Aerospace OEMs are increasingly requiring supply chain sustainability documentation. C18150 CrZrCu benefits from high recyclability — scrap alloy can be remelted and reprocessed with minimal property degradation. Kepai's manufacturing processes are being continuously optimized to reduce energy consumption and material waste, aligning with the aerospace industry's net-zero commitments for 2050.
The development of hypersonic vehicles — both military and commercial — creates extreme material challenges. C18150 CrZrCu is being investigated for leading edge cooling systems and actively cooled structural panels in hypersonic platforms, where its thermal conductivity enables efficient heat removal from surfaces experiencing aerodynamic heating at Mach 5+ speeds.
The deployment of mega-constellations for global broadband coverage (Starlink, OneWeb, Amazon Kuiper) requires thousands of satellites per year. Each satellite contains numerous C18150 CrZrCu components in its RF subsystems, thermal management architecture, and power distribution network. This constellation-scale deployment is creating a sustained, high-volume demand for aerospace-grade CrZrCu materials globally.
Sichuan Kepai New Material Co., Ltd. — Your Trusted Partner for C18150 CrZrCu Aerospace Alloys
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. 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.
Four pillars of excellence powering Kepai's leadership in C18150 CrZrCu aerospace alloy production.
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.
Internationally recognized quality certifications backing every C18150 CrZrCu alloy we produce.
State-of-the-art manufacturing and testing equipment ensuring every C18150 CrZrCu product meets aerospace-grade standards.
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!
Explore the full range of high-performance copper alloy solutions from Sichuan Kepai New Materials.
