Discover our primary selection of raw and processed high-conductivity copper sheets, plates, and customized strategic alloys engineered for precise technological performance.
Pure copper sheets, especially grades such as C11000 (Electrolytic Tough Pitch - ETP) and C10200 (Oxygen-Free - OF), are indispensable raw materials in industrial manufacturing. Characterized by an electrical conductivity of at least 100% IACS (International Annealed Copper Standard), these materials provide the backbone for critical electrical power grids, state-of-the-art battery technologies, and telecommunication modules. The demand for highly reliable wholesale copper sheets has surged due to strict quality controls mandated by electrical component designers and automotive engineers.
For B2B procurement agents, selecting the right wholesale supplier is not just about identifying competitive prices; it is about sourcing sheets with minimal structural defects, precise thickness tolerances, and clean surface finishes. Oxidation resistance and consistent grain structure are critical properties that directly impact downstream processes such as laser cutting, welding, stamping, and deep drawing.
Traditional procurement lists often overlook chemical depth, but sophisticated manufacturers require complete transparency regarding micro-alloy elements. Trace amounts of elements like oxygen, phosphorus, iron, and lead change how a copper sheet performs under thermal stress. While oxygen-free high-conductivity (OFHC) copper prevents hydrogen embrittlement during brazing and welding, tellurium-added alloys provide the machinability needed for mass-producing complex components.
By providing deep specifications and analyzing the chemical limits of C11000 vs. Tellurium Copper or C17500, we deliver verified technical insights. This level of information gain empowers procurement professionals to make calculated risk-management decisions, avoiding downtime caused by brittle joints or sudden conductive failure in high-load setups.
| Alloy Grade | UNS No. | Cu % Min | Electrical Cond. (% IACS) | Thermal Cond. (W/m·K) | Primary Industrial Applications |
|---|---|---|---|---|---|
| Pure Copper (ETP) | C11000 | 99.90% | 100 - 101% | 388 | Electrical switchgears, busbars, grounding grids, transformer sheets. |
| Oxygen-Free Copper | C10200 / C10100 | 99.95% / 99.99% | 101 - 102% | 391 | Semiconductors, vacuum electronics, high-vacuum systems, high-end audio cables. |
| Tellurium Copper | C14500 | 99.50% (Te: 0.4-0.7%) | 90 - 93% | 355 | High-speed machining parts, plasma cutting nozzles, electrical connectors. |
| Beryllium Copper | C17200 / C17500 | 98.00% (Be: 1.8-2.0%) | 20 - 50% | 105 - 130 | High-stress springs, aerospace landing gears, injection molds, non-sparking safety tools. |
| Phosphor Bronze | C51900 / C51100 | Remainder (Sn: 5-7%) | 15 - 20% | 67 - 84 | Corrosion-resistant springs, marine hardware, bellows, high-friction bushings. |
Established in 2017, Sichuan Kepai New Material Co., Ltd. is a high-tech enterprise dedicated to the R&D, processing, and distribution of premium raw materials, structured sheets, and advanced copper alloys.
Strategically situated in the western industrial hub of Sichuan Guanghan Development Zone, alongside National Highway 108, Kepai operates a production footprint designed to support global logistical demands. Our core development model is driven by green manufacturing processes, reducing energy loss in high-temperature extrusion, and reclaiming resource scrap to hit eco-efficiency markers.
Our engineering team works closely with technical universities to refine advanced alloy processing techniques. By mastering oxygen-free high-conductivity tellurium copper, lead copper, and customized sulfur copper, we provide components that push past traditional industrial mechanical yield limits, serving aerospace, laser systems, and high-frequency communication projects.
We supply a wide range of materials, including pure copper, oxygen-free copper, nickel tellurium copper, beryllium copper, chromium zirconium copper, and tin bronze. These materials reduce the overall manufacturing costs for our customers by offering high structural integrity, consistent conductivity, and predictable post-heat treatment behaviors.
Our facilities are equipped with heavy industrial extrusion, drawing, and precision straightening machinery, alongside cutting-edge laboratory systems for physical and chemical composition mapping.
Sichuan Kepai operates under strict international quality guidelines, ensuring that every batch of pure copper sheets and alloys matches international standard systems. We are ISO9001 and SGS verified.
As the world transitions to high-frequency processing networks and green transport infrastructures, the requirements for industrial copper are undergoing major shifts:
The transition toward high-voltage architectures in electric vehicles requires thick-film pure copper sheets that can carry massive currents without overheating. Busbars require copper sheets with clean profiles and minimal oxide layers to guarantee strong weld bonds and reduce resistance at connection points.
Higher frequency communication signals suffer from path loss, requiring conductive pathways that are highly uniform. Pure copper sheets processed for surface smoothness help minimize skin effect losses in micro-circuits, power modules, and base station thermal splitters.
In high-temperature environments, normal pure copper softens rapidly. Introducing micro-particles of aluminum oxide (alumina dispersion-strengthened copper) allows the material to maintain high mechanical strength at elevated temperatures while retaining over 85% IACS electrical conductivity.
Detailed answers addressing critical technical questions raised by quality assurance and B2B sourcing managers globally.
Browse our selection of performance alloys, phosphor coppers, tellurium formulations, and beryllium solutions designed to withstand high friction, structural stress, and extreme electrical loads.
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
