Explore our industrial-grade, precision-manufactured copper, zinc, and high-conductivity alloys tailored for critical applications.
Established in 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech manufacturing powerhouse integrating independent research, advanced metallurgical development, large-scale production, and global sales. Spanning a state-of-the-art facility of 9,000 square meters alongside a dedicated 1,000 square meter research and administrative center, Kepai has positioned itself as a critical player in strategic emerging new materials.
Our operational framework focuses on high-precision special copper-zinc alloys, high-conductivity oxygen-free copper, silver copper, dispersion copper, and custom formulated zinc-die casting alloys. With an engineering ethos prioritizing high electrical conductivity, superior machinability, high mechanical tensile strength, and excellent corrosion resistance, our products form the foundation of critical modern technologies including electric vehicle (EV) drivetrains, 5G wireless base stations, ultra-precise laser cutting nozzles, and highly reliable lithium battery relays.
Located in the western industrial sector of the Sichuan Guanghan Industrial Development Zone, adjacent to National Highway 108, Kepai is structurally positioned to utilize the region's immense logistical and clean energy resources, paving the way for sustainable industrial upgrade and resilient global supply chains.
Understanding the engineering boundaries of zinc-based formulations and copper-zinc systems to solve macro-industrial challenges.
Zinc alloys represent some of the most versatile structural and functional materials in modern manufacturing. Known for their low melting point, high fluidity, excellent electrical and thermal conductivity, and high dimensional stability, custom zinc alloys are the backbone of precision die-casting, automotive hardware, consumer electronics, and corrosion-resistant components. In the scope of precision engineering, zinc is often blended systematically with elements such as copper, aluminum, and magnesium to construct alloys with tailored physical and chemical properties.
At Sichuan Kepai, our custom zinc and copper-zinc formulations focus heavily on controlling the microstructural phases of the metal. For copper-zinc systems (such as high-end brasses and bronze variants), the control of the alpha (α) and beta (β) phases is imperative. A pure alpha phase alloy offers superior cold workability and corrosion resistance, while a duplex alpha-beta (α-β) phase provides elevated mechanical strength and hot machinability. When engineering specialized zinc-die casting formulations, maintaining precise trace levels of aluminum (typically 4%) and magnesium (typically 0.03% to 0.05%) prevents intergranular corrosion while dramatically enhancing tensile strength and impact resistance.
By using precise vacuum induction smelting and continuous vertical casting, we adjust alloy purity up to 99.99%. This strict molecular control limits impurities like iron, lead, cadmium, and tin, avoiding hot shortness (cracking during solidification) and maintaining tight dimensional tolerances of ±0.005mm in cast components.
We work closely with global procurement teams to design, test, and manufacture specific custom alloy grades. The table below represents common metallurgical systems designed in our factory:
| Alloy Classification | Primary Chemical Composition | Key Material Characteristics | Industrial Applications |
|---|---|---|---|
| Zamak 3 / Zamak 5 Equivalents | Zn-4Al-(0.04Mg)-[1Cu] | Excellent castability, high plating capability, superior dimensional integrity. | Automotive components, structural enclosures, precision electronic shields. |
| High-Conductivity Copper-Zinc Alloys | Cu-Zn (Formulated Brass) | Balanced thermal/electrical properties, low friction, superb hot machinability. | 5G RF connectors, electrical relay terminals, high-stress bushings. |
| ZA-8 / ZA-27 Structural Zincs | Zn-(8-27)Al-Cu-Mg | Extreme tensile strength (up to 400 MPa), low density, exceptional wear properties. | Heavy-duty structural brackets, wear plates, aerospace component mounts. |
| Anti-Dezincification Alloys | Cu-Zn-As (Arsenical Brass) | Resists selective leaching of zinc in corrosive environments. | Marine hardware, fluid handling valves, cooling system tubes. |
Leveraging geographical advantages, downstream supply chains, and vertical technology integration to secure a market advantage.
Our Sichuan factory utilizes rapid proximity to primary raw material refineries. This enables us to secure pure electrolytic zinc and copper cathodes at competitive costs, avoiding supply chain disruptions. By keeping processes like smelting, extrusion, drawing, and precision testing in-house, we reduce downstream manufacturing costs for global buyers.
We offer more than catalog items. Our metallurgical engineering team modifies alloys to meet custom requirements—whether adjusting copper content to boost electrical conductivity, adding phosphorus for wear resistance, or reducing lead to meet environmental criteria (RoHS/REACH).
We run a certified testing facility equipped with metallographic microscopes, microcomputer-controlled universal testing machines, and eddy current conductivity instruments. Every batch of custom zinc and copper-zinc alloys comes with material test reports (MTRs) showing trace element composition, tensile strength, and hardness.
Located in Guanghan, Sichuan, we access main expressways and national railways linked directly to international ports like Shenzhen, Guangzhou, and Shanghai. This setup supports cost-efficient multimodal shipping, allowing us to reliably distribute raw billets, extruded rods, and finished components worldwide.
We use precision machinery and diagnostics to maintain high metallurgical quality at every step of manufacturing.
How our custom alloys provide mechanical, thermal, and electrical solutions for core global industries.
The high power density of modern electric vehicle battery packs requires distribution components with low resistance. Our oxygen-free high-conductivity copper and customized copper-zinc alloys are used for busbars, battery pack connectors, and heavy-duty relays. They manage thermal loads during fast charging and prevent electrical faults, helping EV platforms run safely.
5G networks demand high-frequency signal transmission with minimal losses. Our custom non-ferrous alloys provide the dimensional stability, corrosion resistance, and electromagnetic shielding needed for RF connectors, coaxial switches, and complex antenna base plates. Clean machining properties also allow fabricators to manufacture complicated parts with low tool wear.
Industrial laser cutting nozzles work under high thermal stresses and gas pressures. Using alloys like tellurium copper and oxygen-free copper ensures high thermal conductivity to quickly dissipate heat. This stabilizes the cutting arc, prevents metal adhesion to the nozzle tip, and extends the service life of consumable parts.
Our custom zinc alloys provide the fluid flow required to fill thin-walled mold designs in complex castings. These alloys are used in structural components for automotive and consumer electronics, offering high impact strength, natural damping, and easy electroplating or anodizing finishing.
We work to meet global standards, ensuring trace accuracy, compliance, and material safety for our international partners.
Technical guidance and sourcing info to support engineering and procurement decisions.
Browse our catalog of specialized bronze, copper, tellurium, and custom conductivity alloys designed to perform under demanding conditions.
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!
Kepai
