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Precision-engineered beryllium copper alloy solutions designed specifically for electric vehicle charging connectors, contact springs, and high-current terminal systems.
The gold standard alloy for demanding electrical and mechanical applications in EV charging infrastructure worldwide.
C17200 achieves electrical conductivity of 22–28% IACS in its peak-aged condition, enabling efficient current transfer critical for high-power DC fast charging stations (150–350 kW) with minimal resistive heat generation.
22–28% IACSWith tensile strength reaching up to 1,400 MPa after age hardening, C17200 outperforms standard copper alloys by 3–5×, ensuring contact springs and connector terminals maintain reliable clamping force through millions of mating cycles.
Up to 1,400 MPaRetains mechanical properties at elevated temperatures up to 200°C, making it ideal for EV charging connectors that experience repeated thermal cycling from high-current charging sessions in demanding outdoor environments.
Stable to 200°COffers fatigue endurance limits of 300–450 MPa, enabling contact spring elements to withstand billions of stress cycles without permanent set — essential for high-frequency plug-in and plug-out operations at public charging stations.
300–450 MPa fatigue limitNaturally resistant to oxidation, moisture, and atmospheric corrosion, C17200 ensures long-term reliability of outdoor EV charging infrastructure with minimal maintenance requirements, even in coastal or high-humidity environments.
Outdoor ratedIn its solution-annealed state, C17200 can be precision-stamped, deep-drawn, and formed into complex connector geometries before age hardening, enabling cost-effective mass production of intricate EV charging terminal components.
High precision formingKey material parameters that define the performance of Beryllium Copper Alloy C17200 in EV charging applications.
| Property | Value / Range | Significance for EV Charging |
|---|---|---|
| Beryllium Content | 1.80 – 2.00 wt% | Enables precipitation hardening for high strength |
| Cobalt + Nickel | 0.20 – 0.60 wt% | Controls grain structure and aging kinetics |
| Tensile Strength (AT) | 1,100 – 1,400 MPa | Maintains contact force under repeated cycling |
| Yield Strength (0.2%) | 1,000 – 1,250 MPa | Prevents permanent deformation at high loads |
| Hardness (HRC) | 36 – 42 HRC | Wear resistance for high-mating-cycle connectors |
| Electrical Conductivity | 22 – 28% IACS | Low resistance for high-power charging efficiency |
| Thermal Conductivity | 105 – 130 W/(m·K) | Rapid heat dissipation during fast charging |
| Density | 8.26 g/cm³ | Lightweight advantage vs. steel alternatives |
| Elastic Modulus | 128 GPa | Consistent spring-back in contact elements |
| Max Operating Temp. | 200°C continuous | Suitable for thermal cycling in fast chargers |
The explosive growth of electric vehicles is creating unprecedented demand for high-performance materials like C17200 in charging infrastructure globally.
Key market forces accelerating the adoption of beryllium copper alloy in electric vehicle charging infrastructure worldwide.
With global EV sales surpassing 14 million units in 2023 and projected to exceed 45 million by 2030, the demand for reliable, high-performance charging connectors has never been greater. C17200's combination of strength and conductivity makes it the material of choice for Tier-1 connector manufacturers supplying Tesla, BYD, Volkswagen, and other major OEMs.
The industry transition from 50 kW AC chargers to 150–350 kW DC fast chargers dramatically increases thermal and mechanical stress on connector materials. C17200's superior thermal conductivity (105–130 W/m·K) and high-temperature stability directly address the heat management challenges of ultra-fast charging, reducing thermal degradation and extending connector service life.
The emergence of global charging standards — CCS (Combined Charging System), CHAdeMO, and NACS (North American Charging Standard) — is driving demand for precision-engineered contact materials that meet stringent IEC 62196 and UL 2251 specifications. C17200's consistent mechanical properties and machinability enable manufacturers to achieve tight dimensional tolerances required by these standards.
Vehicle-to-Grid (V2G) technology requires connectors capable of handling bidirectional high-current flows with millions of switching cycles. C17200's exceptional fatigue resistance (300–450 MPa endurance limit) and spring-back properties make it uniquely suited for the contact elements in V2G-capable charging equipment, which must maintain precise contact force over the vehicle's entire lifetime.
Modern smart charging stations integrate sensors, communication modules, and power electronics requiring reliable electrical contacts in compact form factors. C17200's ability to be precision-stamped into miniaturized spring contacts and terminals supports the trend toward intelligent, connected charging infrastructure with embedded monitoring capabilities.
As the EV industry prioritizes lifecycle sustainability, the long service life of C17200 components — typically 3–5× longer than phosphor bronze alternatives — reduces replacement frequency and total material consumption. This aligns with circular economy principles increasingly required by European and North American regulatory frameworks for EV infrastructure procurement.
From connector pins to thermal management systems — explore how Beryllium Copper Alloy C17200 powers every critical component in modern EV charging ecosystems.
C17200 is the preferred material for DC fast charging connector pins (CCS Type 1/2, CHAdeMO, NACS) carrying 200–500A continuous current. Its high conductivity minimizes I²R losses while its hardness (36–42 HRC) resists wear from thousands of daily insertion cycles at public charging stations. Precision-machined C17200 pins maintain dimensional tolerances of ±0.01mm critical for reliable electrical contact.
The spring contacts inside EV charging connectors must exert consistent normal force (typically 3–8N per contact) across temperature ranges from -40°C to +85°C. C17200 strip material, precision-stamped into complex spring geometries, delivers fatigue life exceeding 10,000 mating cycles while maintaining spring force within ±5% — a performance level unachievable with standard copper alloys.
Inside DC fast charging cabinets, C17200 bus bar connectors distribute power between rectifier modules, battery management systems, and output terminals. The alloy's combination of electrical conductivity and mechanical strength allows thinner, lighter bus bar designs compared to pure copper, reducing cabinet weight by 15–25% while maintaining current-carrying capacity for 150–350 kW charging systems.
Liquid-cooled charging cables for ultra-fast chargers (350 kW+) require thermally conductive contact sleeves and heat spreaders that maintain structural integrity under cyclic thermal stress. C17200's thermal conductivity of 105–130 W/m·K and high-temperature strength make it ideal for these components, ensuring the cable cooling system operates efficiently and prevents thermal runaway in the connector assembly.
EV charging protocols (IEC 61851, SAE J1772) require dedicated pilot signal contacts for communication between the vehicle and charging station. These low-current but safety-critical contacts demand materials with stable contact resistance over millions of cycles. C17200's oxide-resistant surface and consistent spring properties ensure reliable pilot signal transmission, preventing charging faults and ensuring safe charging initiation.
Charging connectors require mechanical locking mechanisms to prevent accidental disconnection during high-power charging sessions. C17200 locking pawls and retention springs provide the high yield strength (1,000–1,250 MPa) needed to withstand accidental pull forces exceeding 200N, while maintaining precise dimensional tolerances for reliable engagement and release of the locking mechanism throughout the connector's service life.
Emerging wireless EV charging systems (SAE J2954, up to 11 kW) require non-magnetic, structurally rigid coil support frames that don't interfere with electromagnetic fields. C17200's non-magnetic nature, combined with its high strength-to-weight ratio, makes it an ideal structural material for wireless charging pad assemblies, enabling compact designs that withstand road vibration and mechanical loads in vehicle-mounted and ground-embedded applications.
High-current relays and circuit breakers in EV charging stations control power flow and provide over-current protection. C17200 contact bridges in these devices must handle arc erosion from repeated switching of 200–500A DC circuits. The alloy's hardness and thermal stability significantly reduce arc erosion rates compared to conventional contact materials, extending relay service life and reducing maintenance costs for charging station operators.
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.
Our quality management systems and product certifications ensure every batch of C17200 beryllium copper alloy meets international standards for EV charging applications.
State-of-the-art manufacturing and testing equipment ensuring every C17200 beryllium copper product meets the highest standards for EV charging infrastructure applications.
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 C17200 Products →Explore our full range of high-performance copper alloy materials engineered for electric vehicle charging infrastructure and advanced energy applications.
