Explore our elite selection of copper-based engineering solutions optimized for conductivity, hardness, and thermal resistance.
Copper-Nickel-Silicon-Chromium (CuNiSiCr) alloy represents the pinnacle of modern precipitation-hardening copper metallurgy, designed specifically to overcome the physical limits of traditional pure copper.
By alloying copper with precise measurements of nickel, silicon, and chromium, engineers produce a material that triggers intermetallic phase separations (primarily Ni2Si precipitates) during heat treatment. The inclusion of chromium boosts the alloy's thermal stability and recrystallization temperature, preventing softening even when exposed to continuous operational temperatures exceeding 450°C.
Unlike typical solid-solution strengthened alloys where increased strength drastically diminishes electrical conductivity, CuNiSiCr balances high mechanical tensile strength (>700 MPa) with exceptional electrical conductivity (reaching 40% to 50% IACS). This dual characteristic makes it indispensable for components that face extreme mechanical stress while conducting high electrical currents.
Retains structural integrity and resists thermal softening at elevated temperatures, outperforming standard chromium coppers (CuCr1Zr) in continuous-use environments.
Offers a highly reliable, non-toxic substitute for beryllium-copper alloys, meeting strict ESG requirements without compromising on hardness or tensile thresholds.
The micro-alloyed chromium matrix provides excellent resistance to oxidation, mechanical abrasion, and erosion under high friction conditions.
Pioneering the next generation of strategic copper alloys for global industrial transformation.
Established in 2017, Sichuan Kepai New Materials Co., Ltd. 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. Our products are widely 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.
How CuNiSiCr addresses the strict engineering thresholds demanded by high-velocity manufacturing industries.
As EV drivetrains shift to 800V architectures, battery connectors and high-voltage distribution terminals demand materials that withstand rapid thermal cycling without stress relaxation. CuNiSiCr provides the structural stability and conductivity required to prevent critical failures in electric busbars and power relays.
Aerospace instrumentation, military-grade connectors, and heavy-duty switchgear rely on CuNiSiCr to transmit power under extreme mechanical vibration. Its natural resistance to electrical arcing and friction wear translates to reduced maintenance costs and longer component lifespans.
In plastic injection molding and non-ferrous metal casting, rapid cooling is essential to minimize cycle times. CuNiSiCr mold inserts provide the high thermal conductivity of copper paired with the hard wear-resistance of steel, optimizing heat extraction paths.
Why global OEMs partner with Sichuan Kepai New Material Co., Ltd. for strategic alloy sourcing.
Technological innovation is the core competitiveness of Sichuan Kepai New Materials Co., Ltd. Our research and development team consists 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 our 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.
Rigorous quality control processes validated by leading international standards bodies.
Comprehensive in-house manufacturing, drawing, and inspection systems ensuring microstructural consistency.
Smelting Furnace
Laying-off Stage
Extrusion Process
Wire Drawing
Straightening Equipment
Secure Packaging Line
Eddy Current Conductance Tester
Chemical Composition Lab
Metallographic Polisher
Servo Universal Testing Machine
LCD Electronic Tester
Digital Hardness Tester
Driving advanced materials science to meet the demands of tomorrow’s high-power electrification infrastructures.
As technological standards rise, particularly in smart grids, next-generation rail transportation, and aerospace propulsion systems, the requirements for conductor alloys are reaching unprecedented levels.四川 Kepai New Materials is investing heavily in solid-state processing and advanced thermodynamic modeling to push the boundaries of CuNiSiCr and related alloy systems.
Our development roadmap focuses on refining grain boundary geometries at the sub-micron level. This technique minimizes electron scattering, thereby elevating electrical conductivity while retaining high mechanical yield strength. By tailoring the ratio of Nickel, Silicon, and Chromium, we seek to raise the continuous operating thermal ceiling to over 500°C. This advancement will safeguard high-voltage EV battery relays and heavy-duty contactors against sudden, catastrophic electrical surges.
Ensuring seamless international supply chain integration and complete regulatory alignment.
Our complete manufacturing catalog is 100% compliant with REACH and RoHS standards. Our Beryllium-free copper variants ensure that clients can market their products in the European Union and North America without facing toxic substance bans.
We supply CuNiSiCr alloys in diverse form factors, including rods, plates, wires, and customized pre-machined profiles. Our in-house extrusion and drawing facilities permit customized metallurgical tempers matched to specific application needs.
Our engineering support staff stands ready to consult on thermal calculations, machining speeds, and heat-treatment cycles. This ensures your procurement cycle transitions seamlessly from initial testing to large-scale assembly production.
Crucial metallurgical and chemical insights for design engineers and raw material procurement specialists.
A: Standard formulations generally consist of 2.0% to 3.0% Nickel (Ni), 0.4% to 0.8% Silicon (Si), and 0.1% to 0.4% Chromium (Cr), with the remainder being pure Copper (Cu). The exact ratios are precision-calibrated to optimize the distribution of Ni2Si precipitates during thermal aging, ensuring a balance between mechanical hardness and electrical conductivity.
A: While CuCr1Zr offers higher electrical conductivity (typically around 75% to 80% IACS), CuNiSiCr displays superior mechanical strength, surface hardness, and wear resistance at elevated temperatures. In applications where components are subject to continuous mechanical rubbing, heavy contact forces, or high thermal loads—such as plunger tips or heavy-duty connectors—CuNiSiCr delivers a significantly longer operational lifespan.
A: Yes. Many OEMs are transitioning away from Beryllium-Copper due to the severe toxicity hazards associated with Beryllium dust during machining and recycling. CuNiSiCr stands out as a highly effective, non-toxic substitute, providing similar mechanical tensile strengths (>700 MPa) along with excellent thermal performance, keeping operations aligned with green initiatives.
A: Due to the presence of nickel-silicide precipitates, CuNiSiCr is harder to machine than pure copper or brass. Carbide tooling with high-pressure coolant delivery is recommended to manage tool wear and prevent heat buildup. Choosing optimized geometries and appropriate cutting speeds will result in excellent surface finishes for precision connectors and components.
A: Absolutely. Utilizing our integrated manufacturing setup (smelting, extrusion, drawing, and heat treatment), we can customize product characteristics to meet your target specifications. We supply raw stock in rods, bars, plates, and wire form, all optimized for your production lines.
Whether you require custom dimensions, tailored metallurgical tempers, or consistent wholesale supplies, Sichuan Kepai is ready to support your engineering requirements.
High-purity brasses, tellurium coppers, and custom phosphor bronzes manufactured under rigorous quality controls.
Kepai
