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Explore our core copper alloy product line engineered for demanding electrical and industrial applications.
C18150, commonly designated as Chromium Zirconium Copper (CrZrCu), is a precipitation-hardened copper alloy containing approximately 0.50–1.50% chromium and 0.03–0.30% zirconium. This precise alloying composition enables the material to achieve a rare and highly desirable combination of properties: excellent electrical conductivity, outstanding thermal conductivity, and superior mechanical strength — all maintained at elevated operating temperatures.
Unlike standard copper alloys that typically sacrifice conductivity for strength, C18150 CrZrCu retains over 80% IACS (International Annealed Copper Standard) electrical conductivity while delivering tensile strengths exceeding 500 MPa. This makes it uniquely suited for electrical components that must perform reliably under high current loads and thermal stress cycles.
⚡ Key Fact: C18150 CrZrCu offers up to 4× the strength of pure copper while maintaining >80% of its electrical conductivity — a critical advantage for modern high-power electrical components.
| C18150 CrZrCu — Core Specifications | |
|---|---|
| UNS Designation | C18150 |
| Chromium (Cr) | 0.50 – 1.50 % |
| Zirconium (Zr) | 0.03 – 0.30 % |
| Electrical Conductivity | ≥ 80% IACS |
| Tensile Strength | ≥ 500 MPa |
| Hardness (HRB) | 70 – 85 |
| Softening Temperature | ≥ 500 °C |
| Density | 8.89 g/cm³ |
| Thermal Conductivity | ~320 W/(m·K) |
| Available Forms | Rod, Bar, Strip, Wire, Plate |
The global shift toward electrification, miniaturization, and high-power density systems is driving unprecedented demand for materials that can do more in less space — and C18150 delivers exactly that.
With >80% IACS conductivity, C18150 CrZrCu minimizes resistive losses in high-current pathways, reducing energy waste and heat generation in connectors, bus bars, and switching contacts.
The alloy's softening temperature exceeds 500°C, ensuring dimensional stability and contact reliability even in environments with repeated thermal cycling — essential for EV battery connectors and industrial switchgear.
Precipitation hardening delivers tensile strengths over 500 MPa, enabling thinner cross-sections in component design without sacrificing structural integrity — directly reducing material costs and component weight.
The hardened microstructure of CrZrCu resists arc erosion and mechanical wear in switching contacts and relay components, extending service life by 3–5× compared to standard copper alloys.
C18150 machines cleanly and consistently, supporting high-precision CNC manufacturing of complex connector geometries and micro-components required by the electronics and semiconductor industries.
Free from hazardous elements like lead and beryllium in standard formulations, C18150 CrZrCu aligns with global environmental regulations, making it the preferred choice for export-oriented manufacturers.
The global CrZrCu market is experiencing robust growth, underpinned by megatrends in electrification, renewable energy, and advanced manufacturing.
The global EV market, projected to exceed $800 billion by 2030, demands high-performance copper alloys for battery terminal connectors, busbars, charging ports, and motor windings. C18150 CrZrCu is rapidly becoming the material of choice for OEM and Tier-1 EV suppliers due to its unmatched current-carrying capacity and thermal resilience.
5G base stations and millimeter-wave antenna systems require connectors and contacts with ultra-low signal loss. C18150's high conductivity and dimensional stability under thermal stress make it indispensable for 5G RF connectors, antenna brackets, and precision waveguide components.
Solar inverters, wind turbine generators, and grid-scale energy storage systems all rely on high-current switching and connection hardware. CrZrCu's combination of conductivity and strength enables more compact, efficient power conversion equipment with longer maintenance intervals.
Laser cutting and welding equipment, plasma systems, and semiconductor fabrication tools require electrodes and heat sinks that can withstand extreme thermal loads while maintaining precise electrical characteristics. C18150 CrZrCu is the gold standard for these demanding applications.
Battery Management Systems (BMS) for lithium-ion packs require relay contacts and current sensing components that offer minimal resistance, maximum reliability, and resistance to arc erosion. C18150 CrZrCu delivers all three — supporting the safety and longevity of next-generation energy storage.
As manufacturing embraces Industry 4.0, servo motors, precision actuators, and high-frequency switching power supplies demand copper alloy components with tighter tolerances and higher performance. C18150 CrZrCu supports the miniaturization and reliability requirements of advanced automation systems.
From micro-connectors to megawatt switchgear, C18150 CrZrCu is redefining performance benchmarks across the full spectrum of electrical engineering.
DC fast chargers operating at 350kW+ require connector materials that can handle continuous high-current flow without excessive heating. C18150 CrZrCu contact pins and sockets maintain stable contact resistance over thousands of mating cycles, even at ambient temperatures exceeding 85°C. Its high softening temperature prevents permanent deformation of contact geometry under sustained thermal load — a critical safety factor for public charging infrastructure.
Resistance spot welding is fundamental to automotive body-in-white manufacturing. Welding electrodes must endure millions of cycles of extreme pressure, high current, and rapid thermal cycling. C18150 CrZrCu electrodes outperform traditional copper-chromium alloys by maintaining tip geometry longer, reducing dressing frequency and downtime. This translates directly to lower total cost of ownership and higher throughput in automotive assembly lines.
In lithium battery packs and power distribution systems, relay contacts must switch reliably under inductive loads that generate destructive arcing. The hardened surface of C18150 CrZrCu resists arc erosion and material transfer between contacts, maintaining low contact resistance and consistent switching performance throughout the component's rated lifecycle — typically exceeding 100,000 operations under full load.
Laser cutting nozzles and plasma torch electrodes are subjected to extreme localized heat and ionized gas erosion. C18150 CrZrCu's thermal conductivity (~320 W/m·K) efficiently dissipates heat away from the cutting zone, while its hardened structure resists erosion. This extends nozzle service life significantly compared to pure copper, reducing consumable costs and maintaining cut quality consistency in high-volume sheet metal processing operations.
Grid-scale power distribution and industrial switchgear increasingly require compact, high-current busbars that can be installed in thermally challenging environments. C18150 CrZrCu busbars enable smaller cross-sectional areas for equivalent current ratings compared to standard copper, reducing cabinet footprint, material weight, and installation complexity — key advantages in modern data center power infrastructure and industrial motor control centers.
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.
State-of-the-art manufacturing and testing equipment ensures every batch of C18150 CrZrCu meets the strictest quality standards for electrical component applications.
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!
Discover our full range of high-performance copper alloy solutions engineered for electrical, electronic, and industrial applications.
