Engineered with extreme precision to meet the most demanding thermal, mechanical, and electrical specifications.
Why High-Strength Beryllium Copper remains the premier metallurgical choice for extreme performance envelopes.
In aerospace design, materials must withstand high mechanical loads while offering spark resistance and exceptional thermal dispersion. High-strength beryllium copper (especially C17200) is widely utilized for landing gear bushings, bearing surfaces, and actuator sleeves. For subsea cables, marine connectors, and transatlantic telecommunication repeaters, beryllium copper provides unmatched resistance to stress relaxation, hydrogen embrittlement, and marine bio-corrosion, proving essential for infrastructure designed to operate maintenance-free for decades.
Downhole drilling conditions involve corrosive drilling muds, high concentrations of hydrogen sulfide (H₂S), and extreme mechanical stress. Non-magnetic, non-sparking high-strength beryllium copper alloys are engineered for directional drilling housing elements, measurement-while-drilling (MWD) housings, and critical instrumentation components. These alloys maintain high yield strength under high temperatures without failing due to stress corrosion cracking (SCC).
The rise of high-speed 5G network transceivers and miniaturized micro-pitch electronic connectors demands materials that balance high yield strength with high electrical conductivity. Standard copper alloys yield prematurely under cyclic mechanical pressure. In contrast, precipitation-hardened beryllium copper offers the springiness and cyclic fatigue life required for high-density connectors, ensuring consistent signal transmission in high-vibration applications.
The global transition to electrification requires highly reliable energy distribution systems. High-strength and high-conductivity beryllium copper variants (such as C17500 and C17510) are used in EV charging connectors, battery busbars, and relay contacts. Because these components must handle large current surges while maintaining structural integrity and thermal management, custom-treated beryllium copper remains highly effective for electric vehicle systems.
Understanding the precipitation hardening kinetics that differentiate Beryllium Copper from conventional alloys.
High-strength beryllium copper alloys achieve their properties through precipitation hardening (age hardening). During solid solution heat treatment, beryllium is dissolved into the face-centered cubic (FCC) copper matrix. Rapid quenching traps the beryllium atoms in a supersaturated solid solution. Subsequent aging at controlled temperatures (between 315°C and 350°C for high-strength alloys) allows sub-microscopic beryllium-rich GP zones to precipitate out, blocking dislocation movement and significantly increasing tensile strength.
Engineers face a common trade-off when selecting copper alloys: electrical conductivity vs. mechanical tensile strength. Custom beryllium copper addresses this by offering distinct alloy categories. High-strength alloys (C17200, C17300) emphasize ultimate tensile strength (up to 1400 MPa) and hardness, while high-conductivity alloys (C17500, C17510) balance high yield strengths (up to 800 MPa) with 45–60% IACS conductivity.
| Alloy Grade | Composition Profile (wt%) | Tensile Strength (MPa) | Yield Strength (MPa) | Conductivity (% IACS) | Key Applications |
|---|---|---|---|---|---|
| C17200 (CuBe2) | Be: 1.8 - 2.0, Co+Ni: min 0.2, Cu: Bal. | 1100 - 1400 | 950 - 1200 | 15 - 22 | Aerospace bushings, high-pressure springs, non-magnetic non-sparking safety tools, downhole components. |
| C17300 (CuBe2Pb) | Be: 1.8 - 2.0, Pb: 0.2 - 0.6, Cu: Bal. | 1100 - 1380 | 950 - 1180 | 15 - 22 | Free-machining electronic contacts, sub-miniature connectors, high-speed automated lathe parts. |
| C17500 (CuCo2Be) | Be: 0.4 - 0.7, Co: 2.4 - 2.7, Cu: Bal. | 680 - 900 | 550 - 760 | 45 - 55 | Resistance welding electrodes, high-current connectors, plastic mold inserts, heat exchangers. |
| C17510 (CuNi2Be) | Be: 0.2 - 0.6, Ni: 1.4 - 2.2, Cu: Bal. | 700 - 950 | 580 - 800 | 48 - 60 | High-temperature switches, projection welding dies, electric vehicle relays, 5G RF terminals. |
Our history, facilities, and strategic vision for new copper alloy materials.
Established in 2017, Sichuan Kepai New Material 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.
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. Through our advanced metallurgy and control processes, we ensure that impurities are minimized, resulting in highly reliable performance in demanding operating environments.
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.
Meeting safety guidelines, environmental standards, and quality specifications.
We ensure that our manufacturing processes are strictly aligned with international environmental regulations. Although Beryllium is a regulated substance, solid beryllium copper alloys are safe to handle in their solid form, do not pose inhalation hazards, and comply with EU RoHS and REACH regulations for structural components.
Our facility implements strict engineering controls, including localized exhaust ventilation (LEV) and continuous air monitoring, to prevent the inhalation of fine airborne dust or fumes containing Beryllium during machining and thermal processing.
We provide localized engineering support to help select materials, recommend heat treatments, and optimize machining parameters. Our global supply chain ensures that technical documentation and high-quality materials reach your production line on time.
Our in-house capabilities enable us to maintain strict quality control from raw materials to final shipment.
Smelting Furnace
Laying-off Station
Extrusions Press
Cold Drawing Unit
Precision Straightening
Protective Packaging
Eddy Current Conductance Tester
Chemical Composition Lab
Metallographic Polisher
Universal Testing Machine
Universal Testing Machine (LCD)
Precision Hardness Tester
Our commitment to E-E-A-T principles is demonstrated by our certified quality management systems.
How Sichuan Kepai is developing advanced copper materials for future applications.
Our research and development team uses advanced vacuum induction melting (VIM) technology to reduce gas inclusion levels in the copper matrix. By refining chemical compositions and optimizing the reduction ratio during hot extrusion, we achieve a consistent grain size (typically ASTM 8 or finer), which helps prevent anisotropy during deep drawing or micro-machining.
We are actively developing low-beryllium and beryllium-free alternatives (such as copper-nickel-silicon and copper-nickel-tin spinodal alloys) to meet changing regulatory requirements. Our goal is to match the relaxation performance and yield strength of C17200 while offering alternative options for environmentally sensitive applications.
Direct metallurgical insights from our research team to help optimize your material selection.
Beryllium copper stands out because of its high yield strength (exceeding 1000 MPa in C17200) combined with good electrical and thermal conductivity. While alloys like brass or bronze offer either decent conductivity or high strength, only precipitation-hardened beryllium copper offers the high mechanical strength, fatigue limits, and electrical conductivity required for heavy-duty contacts and subsea instrument housings.
Yes. Solid beryllium copper parts do not pose a health risk. However, operations that generate fine dust or fumes, such as grinding, dry sanding, or welding, require proper engineering controls (such as wet machining and HEPA-filtered vacuum extraction) to avoid inhaling airborne beryllium particles, which can cause lung sensitization.
C17200 is the standard high-strength beryllium copper alloy. C17300 contains a small addition of lead (0.2 - 0.6 wt%), which acts as a chip breaker during machining. This makes C17300 suitable for high-speed automated Swiss lathe turning operations while maintaining the same physical and mechanical properties as C17200.
Age hardening causes a slight dimensional contraction in beryllium copper, typically in the range of 0.2% to 0.4% in linear dimensions. For high-precision parts, we recommend solution-annealing, rough-machining, and then performing the final aging heat treatment before final grinding to maintain tight dimensional tolerances.
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Whether you require customized alloy specifications, precision extruded bars, or assistance with heat treatment, our metallurgical engineers are here to support your project.
Kepai
