Explore high-performance metallurgy custom-engineered to power modern industrial innovations.
UNS C17200 Beryllium Copper (commonly referred to as Alloy 25) is the most widely utilized copper-beryllium alloy, recognized for its exceptional strength and high conductivity properties. By combining trace amounts of beryllium (typically 1.8% to 2.0%) with premium-grade pure copper, C17200 achieves a remarkable response to precipitation hardening treatments, elevating its tensile strength to levels that rival high-alloy steels.
For global procurement managers and structural design engineers, selecting C17200 means capitalizing on a unique material that exhibits an optimal balance of electrical/thermal conductivity, fatigue endurance, and wear resistance. Unlike steel, C17200 is completely non-sparking and non-magnetic, making it the material of choice for high-reliability components operating in hazardous, corrosive, or high-vibration environments.
| Physical & Mechanical Property | Metric Value Range | Imperial Value Range |
|---|---|---|
| Density | 8.25 g/cm³ | 0.298 lb/in³ |
| Melting Point | 865 - 980 °C | 1590 - 1800 °F |
| Tensile Strength (Yield) | 195 - 1380 MPa | 28 - 200 ksi |
| Tensile Strength (Ultimate) | 410 - 1520 MPa | 60 - 220 ksi |
| Elastic Modulus | 131 GPa | 19,000 ksi |
| Electrical Conductivity | 15 - 30% IACS | 15 - 30% IACS |
| Thermal Conductivity | 105 W/m·K | 60 Btu/ft·hr·°F |
| Hardness (Rockwell C) | 36 - 42 HRC | 36 - 42 HRC |
How C17200 addresses complex mechanical challenges across high-tech domains.
Used extensively in aircraft landing gear bushings, safety switches, and military-grade communication connectors. C17200 provides the durability required to withstand shock, vibration, and extreme atmospheric variations without galling or losing mechanical spring tension.
With the rapid transition to electric vehicles, high-conductivity relay components and heavy-duty high-voltage connectors require materials like C17200. Its excellent thermal dissipation guarantees long term safety and continuous operational efficiency at high currents.
Downhole drilling tools demand materials that resist structural distortion under immense deep-sea pressure. C17200 is heavily favored for directional drilling instrument housings, sensor components, and subsea connectors due to its resistance to stress-corrosion cracking.
Micro-electronic switches, RF connectors, and optical fiber transmission devices deploy Beryllium Copper due to its spring longevity. It maintains reliable contact pressure over millions of insertion cycles without material fatigue.
Because of its ability to retain structural rigidity and thermal conduction under intense local heat, C17200 is deployed as nozzles, electrodes, and tooling inserts in precision automated plastic molds and high-frequency resistance welding systems.
In plastic injection molding, C17200 cores and cavities provide accelerated cooling cycles compared to tool steels. This high thermal conductivity drastically reduces production cycle times and eliminates plastic part deformation.
As global demands shift toward tighter dimensional tolerances, shorter lead times, and lower production costs, selecting a premium Chinese copper alloy manufacturer has become a highly strategic choice. Sichuan Kepai New Material Co., Ltd. sits at the absolute forefront of this technological curve.
Leveraging advanced smelting, vertical continuous casting, extrusion, and drawing equipment, Sichuan Kepai manufactures specialty copper alloys (including Beryllium Copper, Tellurium Copper, Oxygen-Free Copper, and Dispersion-Strengthened Copper) to strict international ASTM, EN, and JIS standards. Our facility is situated in the Western Zone of the Sichuan Guanghan Industrial Development Zone, adjacent to crucial logistics networks to guarantee fast global dispatch.
By combining independent research and development with industry-university-research partnerships, we consistently optimize grain-refinement processes. This creates copper materials with minimal internal stress, uniform mechanical properties, and excellent machinability, reducing down-stream scrap rates for our global clientele.
Global procurement managers must balance cost optimization with supply chain stability. Sichuan Kepai provides a reliable, end-to-end manufacturing footprint that eliminates intermediate trading margins.
Our internal chemical testing labs, metallographic analysis machinery, and ultrasonic flaw detectors ensure that every batch of C17200 contains the exact designated chemistry. Through strict process control from raw raw materials to final vacuum packaging, we protect your supply chain against premature fatigue and structural failure in the field.
A high-tech enterprise dedicated to the research, development, and production of strategic copper alloys.
Sichuan Kepai New Materials Co., Ltd., established in 2017, is a high-tech enterprise integrating research and development, production, and sales.
Currently, our state-of-the-art factory covers an area of approximately 9,000 square meters, with a dedicated management and engineering 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 high-end copper materials are widely exported and applied in industries such as new energy vehicles, 5G communication systems, precision aerospace connectors, laser cutting consumables, and high-voltage power relays.
A detailed look into our technical systems, market presence, and corporate standards.
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 commitment to internationally recognized quality assurance systems.
Ensuring micro-structural integrity and dimensional precision from raw alloy to finish product.
Key checkpoints for international procurement teams, engineers, and suppliers.
When ordering C17200 properties materials, specify the exact temper requirements. Beryllium copper is available in cold-worked tempers (e.g., H, ½ H, ¼ H) or precipitation heat-treated tempers (e.g., AT, HT). Procurement managers should cross-verify standards such as ASTM B194 (for plate, sheet, strip), ASTM B196 (for rod and bar), and ASTM B251 (for tube).
Working with a supplier like Sichuan Kepai ensures access to comprehensive heat-treatment data curves, so your local machine shop can execute rough machining in the ductile, soft condition (annealed) and age-harden the parts afterwards at 315°C (600°F) for 2 to 3 hours to achieve maximum hardness.
To align with search intent and quality guidelines, check that your chosen C17200 company meets these criteria:
Clear, direct metallurgical answers to the industry's most common questions.
UNS C17200 Beryllium Copper consists primarily of 1.8% to 2.0% Beryllium (Be), with a minimum of 0.2% Cobalt (Co) + Nickel (Ni), and the balance being pure Copper (Cu). The trace addition of cobalt or nickel serves to refine the grain structure and prevent grain growth during thermal processes.
C17200 undergoes precipitation hardening. By heating the material at 315°C (600°F) for 2 to 3 hours, beryllium atoms precipitate out of the solid solution into the copper lattice matrix, creating localized strain fields that block dislocation movement. This process increases tensile strength from approximately 400 MPa to over 1300 MPa.
Yes, in solid forms like rods, sheets, or completed parts, C17200 is completely safe. Beryllium-containing alloys pose an inhalation hazard only when fine dust, particles, or fumes are generated, which can occur during grinding, dry machining, or welding. Using proper local exhaust ventilation and wet machining processes eliminates these risks.
C17300 is essentially C17200 with a small addition of lead (0.2% to 0.6% Pb). The addition of lead acts as an internal lubricant and chip breaker, enhancing machinability for high-volume Swiss-type automated CNC lathe operations while maintaining equivalent physical and mechanical strengths.
C17200 maintains excellent electrical and thermal conductivity, is highly resistant to marine environments, does not rust, is non-magnetic, and does not cause sparks in explosive atmospheres. Standard carbon spring steel lacks these characteristics.
Yes, it can be joined through soft soldering, silver brazing, or arc welding. However, because heat exposure can alter the heat-treated state, localized parts may require post-weld solution annealing and aging treatment to restore their original tensile properties.
The coefficient of thermal expansion (CTE) of C17200 is approximately 17.0 x 10⁻⁶/°C (9.4 x 10⁻⁶/°F) over the temperature range of 20°C to 200°C. This predictable expansion makes it highly compatible with other metallic alloys in precision assemblies.
In setups such as complex connector pins or laser cutting assemblies, beryllium copper is deployed where high mechanical spring strength is required. Tellurium copper, such as C14500, is used in components that require high electrical conductivity (up to 93% IACS) and fast, high-volume machining.
Industrial materials designed to meet high engineering demands.
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