Explore our flagship series of advanced copper materials and precision-engineered alloys customized for worldwide industrial sectors.
Oxygen-Free Copper (OFC) represents the pinnacle of metallurgical purity in copper manufacturing. Categorized under major global designations such as UNS C10100 (Oxygen-Free Electronic, OFE) and UNS C10200 (Oxygen-Free, OF), this specialized material is refined through induction furnace melting under a vacuum or a highly controlled reducing atmosphere. By mitigating oxygen levels to less than 0.001% (10 ppm) and overall chemical impurities to negligible levels, OFC yields structural and electrical attributes that are unattainable with standard ETP (Electrolytic Tough Pitch) copper alloys.
OFC boasts an electrical conductivity rating exceeding 101% IACS (International Annealed Copper Standard). This guarantees minimal resistive losses in high-frequency and high-power applications, making it essential for critical electrical infrastructure.
Standard copper containing cuprous oxide (Cu2O) undergoes severe hydrogen embrittlement when exposed to reducing gases at high temperatures. High-purity oxygen-free copper prevents this structural degradation entirely, ensuring structural longevity under vacuum thermal processing.
With an extremely low volatile impurity rate, oxygen-free copper prevents outgassing when exposed to ultra-high vacuum conditions (UHV). This makes it highly sought after for cryogenics, physics research instruments, and semiconductor fabrication chambers.
Technical Insight: The absence of cuprous oxide inclusions in Oxygen-Free High Conductivity (OFHC) tubes enables exceptional mechanical workability. During cold drawing and fabrication processes, C10100 and C10200 copper tubes exhibit unparalleled ductility, allowing tighter bend radii, complex flaring, and highly reliable TIG/MIG welding joints.
Understanding the key differences is vital for global procurement engineers:
Sichuan Kepai New Materials Co., Ltd. (established in 2017) operates a state-of-the-art 9,000 square meter facility in the western area of the Sichuan Guanghan Industrial Development Zone. Positioned strategically adjacent to National Highway 108, Kepai combines local logistical efficiency with cutting-edge engineering capabilities to supply high-end, strategic new materials aligned with China's national development frameworks.
By executing an integrated research, production, and distribution model, Kepai has positioned itself as a pivotal node in the global high-performance copper supply chain. From the sourcing of pure cathode copper to precision continuous horizontal casting, induction melting, extrusion, and drawing, Kepai guarantees that every custom tube batch meets exact dimensional tolerances and structural specifications.
Kepai’s technical core is driven by a specialized research and development team composed of senior industry metallurgists and engineers. Through persistent exploration in high-performance copper alloy structures—including tellurium copper, dispersion-strengthened copper, and high-purity oxygen-free copper—Kepai has pushed the performance boundaries of strategic materials. Our joint research initiatives with prominent metallurgical academic institutions enable us to deliver products that meet the highest standards of international competition.
At Kepai, quality control is integrated into every phase of production. The factory floor is equipped with advanced testing suites, including eddy current non-destructive testing for surface and structural flaws, chemical composition analysis rooms, metallographic examination stations, and universal hydraulic testing machines. Every batch of oxygen-free copper tubing is certified for grain size, conductivity, and absence of oxygen inclusions before dispatch.
Take a look inside our manufacturing lines and QA testing laboratories where high-purity copper solutions are forged and certified.
Sichuan Kepai provides global businesses with extensive localization services and custom engineering support. We recognize that international engineering projects demand compliance with diverse regulatory and material frameworks. We actively manufacture products to align with several international standards:
All copper alloys dispatched from our facility are certified under international environmental regulations, including the European RoHS Directive (2011/65/EU) and REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). This ensures that global OEM brands, electronics manufacturers, and automotive supply chains can source from Kepai without facing compliance bottlenecks at regional ports of entry.
From our strategically located facility in Guanghan, Sichuan, we maintain reliable supply lanes to major international ports (such as Shenzhen, Shanghai, and Ningbo), as well as direct railway connections to Central Europe. We offer structured logistics agreements including FOB, CIF, DDP, and DAP, supported by robust anti-oxidation packaging (vacuum wrapping, desiccant modules, and reinforced wooden crates) to preserve product condition during transport.
The transition toward electrification, digital network density, and clean energy has accelerated the demand for high-purity oxygen-free copper tubes. As design parameters push the thermal and electrical performance of copper to its limits, industries are increasingly moving away from ETP copper to adopt OFC/OFHC tubes. Critical application scenarios include:
In high-voltage EV battery packs, drive motors, and supercharging interfaces, copper components must handle heavy electrical loads without significant heat buildup. OFC tubes are used in cooling conduits, busbars, and internal relays to ensure thermal and electrical efficiency.
5G base station transmitters, coaxial cables, and high-frequency wave guides require highly uniform metal conduits. The low signal attenuation and excellent conductivity of oxygen-free copper tubes optimize wave propagation and signal clarity.
Precision plasma and laser cutting machines require materials capable of withstanding intense thermal stress. Kepai's tellurium-copper and oxygen-free copper alloys are highly valued for laser cutting nozzles and heavy-duty high-power relay contacts.
As micro-manufacturing and structural miniaturization advance, the demand for precision copper capillary tubes, customized ultra-thin wall profiles, and specialized multi-channel tubes is rising. Sichuan Kepai remains at the forefront of this shift, continuously developing advanced copper alloys that combine easy machinability with excellent electrical conductivity, helping engineers develop next-generation technologies.
Sichuan Kepai stands behind verified quality. Below are our official certifications validating our production processes and material testing standards.
Get professional metallurgical insights regarding the procurement, application, and processing of Oxygen-Free Copper Tubes.
Are you looking for high-purity oxygen-free copper tubes, specialized tellurium copper, or customized alloys? Our team of engineers is ready to discuss your project specifications and provide a competitive quotation.
From pure copper to specialized tellurium, sulfur, and beryllium alloys, we provide materials tailored for challenging engineering requirements.
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