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Discover our top-tier copper alloys specifically engineered to meet the extreme demands of modern electric vehicle charging networks and high-voltage power transmission.
The global transition towards electric mobility is accelerating at an unprecedented pace, fundamentally altering the landscape of transportation and energy distribution. As Electric Vehicles (EVs) become mainstream, the demand for robust, high-efficiency EV charging infrastructure has skyrocketed. The industry is rapidly shifting from standard AC destination charging to ultra-fast High-Power DC Fast Chargers (DCFC) capable of delivering 350kW and beyond. At the very heart of this technological revolution lies a critical engineering challenge: finding advanced materials capable of withstanding extreme electrical loads, severe thermal stress, and relentless mechanical wear. Enter the C17200 Alloy, a high-strength beryllium copper alloy that is serving as the ultimate solution for EV charging infrastructure.
UNS C17200, commonly known as Alloy 25, is the most highly utilized beryllium copper alloy in demanding industrial applications. It boasts an extraordinary combination of physical and mechanical properties. With a tensile strength that can exceed 1400 MPa after heat treatment, it rivals high-grade steel, yet it maintains excellent electrical conductivity (typically 22-28% IACS) and superior thermal conductivity. In the context of EV charging, where components are subjected to thousands of mating cycles and massive current surges, the C17200 alloy provides unparalleled resistance to fatigue, galling, and stress relaxation.
In today's commercial landscape, the deployment of ultra-fast charging networks is heavily bottlenecked by thermal management. When pushing 500 Amps of current through a charging cable and connector, traditional materials such as standard brass or phosphor bronze suffer from excessive Joule heating. This heat generation not only limits the charging speed but also poses severe safety risks, including the potential for thermal runaway or melting of the connector casing.
Commercially, major Charge Point Operators (CPOs) and EV Supply Equipment (EVSE) manufacturers are realizing that the Total Cost of Ownership (TCO) is vastly improved by utilizing premium materials. While C17200 Alloy carries a higher initial material cost compared to standard copper alloys, its exceptional durability drastically reduces maintenance intervals, prevents catastrophic station failures, and enables liquid-cooled charging cables to operate at maximum efficiency. Consequently, the industrial status of C17200 has shifted from a niche aerospace material to a fundamental prerequisite for Tier-1 EV charging infrastructure manufacturers globally.
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 integration of C17200 Alloy spans across multiple critical components within the electric vehicle ecosystem. Let's explore the depth of its applications in modern charging infrastructure.
To achieve 10% to 80% charge in under 15 minutes, DC fast chargers utilize liquid-cooled cables pushing over 500A. The connector pins must endure intense thermal cycling and physical insertion forces. C17200 beryllium copper provides the necessary spring force to maintain low contact resistance, preventing micro-arcing and ensuring rapid heat dissipation into the cooling fluid.
Inside the EV charger and the vehicle's battery management system (BMS), high-voltage contactors must safely make and break circuits carrying up to 1000V. C17200 offers exceptional arc resistance and anti-welding properties. Its superior stress relaxation resistance ensures that the relay springs maintain their tension over millions of switching cycles without failure.
In commercial fleet operations, battery swapping stations require connectors that can withstand tens of thousands of automated, high-force mating cycles. The high hardness and galling resistance of C17200 Alloy prevent fretting corrosion and mechanical wear, ensuring that power transfer remains perfectly efficient year after year.
Vehicle-to-Grid (V2G) technology allows EVs to feed power back into the grid. This bi-directional energy flow demands zero-latency electrical transmission and ultra-stable connections. C17200 components in smart grid transformers and bi-directional inverters guarantee that energy conversion losses are minimized, supporting a greener, more resilient power network.
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.
As the electric vehicle market matures, the engineering requirements for charging infrastructure are becoming increasingly stringent. The future of EV charging relies heavily on the continuous advancement of metallurgical science, and C17200 Alloy is at the forefront of these development trends.
Megawatt Charging Systems (MCS): The electrification of heavy-duty commercial trucks, electric buses, and aviation requires power levels that dwarf passenger car chargers. The upcoming Megawatt Charging Systems aim to deliver up to 3000 Amps at 1250 Volts. At these astronomical power levels, any microscopic flaw in contact resistance generates massive heat. C17200 is uniquely positioned to handle these loads due to its structural integrity at elevated temperatures, ensuring that commercial fleets can recharge safely in minutes rather than hours.
AI-Enhanced Predictive Maintenance: The next generation of EV charging stations will be heavily integrated with AI-driven IoT sensors. These smart chargers monitor micro-fluctuations in resistance and temperature to predict hardware failures before they occur. The highly stable electrical resistance profile of C17200 across a wide temperature gradient provides clean, predictable data for AI algorithms, eliminating false positives and ensuring maximum uptime for charging networks.
Sustainability and Circular Economy: Environmental compliance standards (such as RoHS and REACH) are driving the industry toward highly recyclable materials. Beryllium copper alloys like C17200 are 100% recyclable without loss of their premium properties. By significantly extending the lifespan of charging station components, C17200 reduces electronic waste and aligns perfectly with the global mandate for sustainable, green energy infrastructure.
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.
Smelting
Laying-off
Extrusion
Drawing
Straightening
Package
Eddy Current Conductance Instrument
Chemical Composition Test Room
Metallographic Sample Polishing Machine
Electro-hydraulic Servo Universal Testing Machine
Electronic Universal Testing Machine
Hardness Tester
When evaluating materials for EV charging infrastructure, a comparative analysis clearly demonstrates why C17200 Beryllium Copper is the superior choice. Traditional materials like Brass (C36000) or Phosphor Bronze (C51000) offer adequate machinability and baseline conductivity but fall drastically short in mechanical resilience. In a scenario where an EV charging connector is dropped on concrete or subjected to lateral stress during plug-in, brass connectors are prone to permanent deformation. This deformation increases contact resistance, which subsequently leads to overheating.
In contrast, C17200 Alloy possesses a yield strength that is nearly triple that of standard bronze. It exhibits remarkable "memory" or spring properties, meaning that even after thousands of insertions and extractions, the contact pins snap back to their precise original dimensions, gripping the vehicle's receptacle with optimal force. Furthermore, C17200 demonstrates exceptional resistance to elevated temperatures. While standard alloys begin to lose their temper and soften at around 150°C, C17200 maintains its structural integrity well beyond 250°C, providing an invaluable safety margin for high-power DC charging stations. Ultimately, investing in C17200 components ensures that EV infrastructure remains safe, efficient, and operationally profitable for decades.
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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!
