Direct from our state-of-the-art production lines. High electrical conductivity combined with structural durability.
Global leader in the R&D and precision metallurgy of high-conductivity special copper alloys.
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech private enterprise specializing in the research, development, production, and distribution of high-conductivity, high-strength free-cutting tellurium copper and other specialized copper-based alloys.
Operating from a modern 29,000 square meter state-of-the-art facility, Kepai supports over 1,000 global manufacturers with high-precision materials. Our engineering staff hold more than 30 patent certificates, validating our role as pioneers in high-conductivity alloy solutions.
A comparative structural analysis of industrial alloys designed for mechanical machinability and peak conductivity.
| Alloy Grade | Composition Key Elements | Conductivity (% IACS) | Tensile Strength (MPa) | Machinability Rating | Primary Industrial Use Case |
|---|---|---|---|---|---|
| C14500 (Tellurium Copper) | Cu: 99.5%, Te: 0.4-0.7%, P: 0.008% | ≥ 93% | 250 – 380 | 85% | EV Charging Pins, Plasma Nozzles, Switchgear |
| OFT (Oxygen-Free Tellurium) | Cu > 99.95%, Te: 0.4-0.7%, O < 5ppm | ≥ 98% | 240 – 360 | 80% | Laser Electrodes, Semiconductors, Vacuum Components |
| C17200 (Beryllium Copper) | Cu: Bal, Be: 1.8-2.0%, Co+Ni: 0.2% | 22 – 28% | 1100 – 1380 | 20% | Heavy-Duty Springs, Downhole Tools, Aerospace Connectors |
| C17500 (Beryllium Cobalt) | Cu: Bal, Be: 0.4-0.7%, Co: 2.4-2.7% | 45 – 60% | 680 – 960 | 50% | Resistance Welding Electrodes, Switch Gears |
| C14700 (Sulfur Copper) | Cu: 99.6%, S: 0.2-0.5%, P: 0.003% | ≥ 90% | 220 – 320 | 85% | Electrical Connectors, High-Speed Turned Screw Parts |
| C36000 (Lead Brass) | Cu: 61.5%, Zn: 35.4%, Pb: 3.0% | 26% | 340 – 480 | 100% | Lock Gears, Plugs, Fluid Connectors, Precision Valves |
By blending trace quantities of tellurium (0.4-0.7%) with copper, Kepai successfully bypasses the structural toughness limit of pure copper. The copper matrix maintains an electrical conductivity exceeding 93% IACS while providing short, brittle chips during CNC machining, increasing fabrication speeds and tool lifespans.
Referred to as the "king of non-ferrous metals," beryllium bronze utilizes precipitation hardening to reach tensile strengths up to 1380 MPa. It is characterized by high fatigue life, high electrical properties, and non-magnetic operation, which makes it ideal for safety switches, subsea components, and critical aerospace spring clips.
Sulfur copper (C14700) provides an optimal compromise between high electrical conductivity (90% IACS) and fast machinability, while bypassing the environmental lead limits. Similarly, our specialty Lead Bronze alloys utilize controlled microscopic lead distribution to function as high-wear structural bearings under severe boundary friction.
Providing high-conductivity raw materials and custom-machined billets for complex system assemblies.
High-voltage battery packs, fast charging gun terminals, and drive-motor connection rings rely on Tellurium copper C14500. This material prevents heat buildup during high-amp charging phases (350kW+ superchargers), minimizing energy loss.
Our beryllium copper foils and wires are used in military-grade connectors and precision control relays. High wear resistance combined with elasticity under extreme thermal gradients ensures reliable telemetry and generator performance.
Copper alloys provide natural protection against biofouling and resist saltwater corrosion. Our lead bronze and copper-nickel alloys are used in offshore drilling components, subsea valves, and marine piping systems.
High-purity oxygen-free copper and antimicrobic copper alloys are used in clinical environments, high-field MRI scanners, RF shielding enclosures, and surgical instrument housings, using copper's natural physical properties.
High-power plasma cutting electrodes and nozzle holders undergo severe thermal stress. Using Kepai high-purity tellurium copper alloys maintains consistent geometry under arc temperatures exceeding 10,000°C.
Solar inverter busbars, utility-scale power transmission components, and heavy-duty switchgears utilize oxygen-free high conductivity (OFHC) tellurium copper to optimize power yields and prevent heat generation.
How Sichuan Kepai leverages raw material positioning and lean production to stabilize international manufacturing pipelines.
Operating out of Sichuan Province, Kepai leverages local refined copper raw material reserves and energy infrastructure. Our proximity to high-purity cathode copper deposits reduces volatile long-distance transportation costs and insulates downstream clients from supply disruptions.
Our 29,000 square meter refining center features automated horizontal continuous casting machines, high-precision extrusion presses, and intermediate drawing benches. This vertical integration allows us to process scrap copper internally, monitor trace element distributions with precision, and control metallurgical structure variations across production runs.
Kepai operates dedicated logistics corridors servicing major maritime shipping gateways. We provide continuous customs clearance management, neutral packaging, and direct delivery options to destinations across Europe, North America, and Southeast Asia. Our dynamic inventory management structures safety stocks to mitigate maritime shipping variations, ensuring scheduled delivery cycles for foreign buyers.
Developing green, lead-free, and high-performance alloys to support next-generation power electronics.
Global environmental regulations continue to tighten restrictions on heavy metal usage. Our materials laboratory is researching bismuth-copper and tellurium-sulfur ternary alloys to replace leaded brasses. This seeks to match classic free-cutting speed performance without compromising environmental compliance.
Megawatt-level electric vehicle charging requires copper terminals capable of managing continuous high-temperature currents without thermal deterioration. We are refining trace element additions to increase the softening temperatures of C14500 beyond 400°C while maintaining electrical conductivity ≥ 95% IACS.
Advanced semiconductor lithography and outer-space instrumentation require oxygen-free tellurium copper containing under 2ppm oxygen. Kepai is updating its vacuum induction melting setups to supply clean, inclusion-free billets that mitigate the risk of high-temperature hydrogen embrittlement.
Precision laboratory analysis and compliance testing to meet international industrial standards.
Our production facilities maintain active certifications for quality, environmental, and occupational safety management, including:
Every manufacturing run undergoes chemical and physical testing. Quality metrics are recorded in Mill Test Reports (MTR) using:
We work to ensure all outgoing products comply with current international chemical restrictions, including:
Metallurgical details and engineering guidance for special copper material selection.
Get in touch with Sichuan Kepai's engineering team for material specifications, custom chemical blending, and bulk pricing.
Send Inquiry NowExplore our industrial range of phosphor coppers, high-tensile brasses, and beryllium alloys.
Kepai New Material