Premium, high-performance alloys tailored to meet the strict technical standards and tolerances of Osaka's leading industrial sectors.
Osaka, as the heart of the Kansai industrial region, has long been celebrated for its "Monozukuri" (precision craftsmanship) spirit. From the micro-machining workshops of Higashiosaka to major aerospace, electronics, and automotive manufacturing complexes along the Osaka Bay, the demand for highly efficient materials is critical. Among these, Tellurium Copper (UNS C14500) stands out as a foundational alloy driving high-speed automated production.
Traditional pure coppers (such as C11000) possess outstanding conductivity but are notorious for being soft, sticky, and exceptionally difficult to machine. In high-volume CNC automatic lathe operations, pure copper forms long, continuous, stringy chips that wrap around tooling, leading to tool breakage, production halts, and unacceptable surface finishes.
For Osaka’s component designers, this unique matrix translates to reduced cycle times, minimal tool wear, and flawless surface finishes on critical components like plasma cutting tips, electrical switches, sensor housings, and battery terminals.
A comparative overview demonstrating the operational advantages of C14500 Tellurium Copper against competing copper alloys commonly utilized in Japanese factories.
| Alloy Classification | Common Designation | Machinability Rating | Electrical Cond. (% IACS) | Thermal Cond. (W/m·K) | Primary Industrial Use cases in Japan |
|---|---|---|---|---|---|
| C14500 (Tellurium Copper) | Te-Cu / JIS C14500 | 85% | 93% - 98% | 355 | Plasma welding tips, EV connectors, electrical contacts, CNC machined components |
| C11000 (Electrolytic Tough Pitch) | ETP / JIS C1100 | 20% | 101% | 388 | Bus bars, transformer windings, electrical ground cables (low machining req.) |
| C12200 (Phosphorized Copper) | DHP / JIS C1220 | 20% | 80% - 85% | 340 | Heat exchanger tubes, condenser tubes, gas pipelines |
| C36000 (Free-Cutting Brass) | Lead Brass / JIS C3604 | 100% (Baseline) | 26% | 115 | Precision turned parts, plumbing fixtures, gears (where conductivity is not critical) |
*Values are representative indicators. Under extreme high-frequency situations, Kepai's proprietary high-conductivity oxygen-free tellurium copper variants can approach 98% IACS while preserving the 85% machinability index.
Mapping metallurgical properties directly to the high-technology clusters operating within the Kansai economic zone.
Osaka's shipbuilding, heavy machinery, and steel fabrication yards along the Yodogawa River depend heavily on plasma cutting machines. C14500's high heat absorption and electrical stability prevent the fast degradation of cutting nozzles, resulting in cleaner cuts, reduced downtime, and lower replacement costs.
With Japan's aggressive shift towards carbon neutrality, automotive suppliers in the Kansai area are developing next-generation rapid-charging hardware. The contact pins and connector blocks must handle hundreds of amperes without overheating, a demand that is perfectly fulfilled by Kepai’s high-conductivity tellurium copper.
As the terminal hub for the Tokaido and Sanyo Shinkansen lines, Osaka hosts key railway maintenance engineering groups. Tellurium copper is extensively used in locomotive relays, catenary wire terminals, and power grid switches where mechanical reliability and low resistance are essential.
In today's volatile global economy, supply chain resilience is a primary concern for Japanese procurement managers. Sichuan Kepai New Material Co., Ltd. addresses this through a robust, vertically integrated production model. By controlling everything from raw material smelting to final extrusion and cold drawing at our state-of-the-art facility, we eliminate third-party supply bottlenecks.
Our strategic geographical position adjacent to National Highway 108 and key rail terminals allows us to transport goods quickly to major shipping ports like Shanghai and Ningbo. From there, direct container lines to the Port of Osaka offer rapid sea transit, usually completed in 5 to 7 days.
Furthermore, our large-scale production capacity allows us to maintain stable stockpiles of copper cathode and tellurium raw inputs, insulating our Japanese partners from the sudden price fluctuations often seen in metal trading markets.
Pioneering green metallurgy and ultra-high-density copper alloys for the next generation of smart manufacturing.
Industrial manufacturers in Osaka operate under strict environmental guidelines (METI regulations). Sichuan Kepai has proactively adjusted its metallurgical processes to ensure that all our exported tellurium copper alloys are fully compliant with EU RoHS and REACH directives, as well as Japanese domestic environmental standards. By replacing hazardous materials (such as leaded coppers) with tellurium and sulfur-based alternatives, we help our clients transition to cleaner, green-labeled end products without sacrificing mechanical performance.
A high-tech enterprise integrating research and development, production, and sales of high-performance strategic copper alloys.
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.
Verified compliance under international industrial standards, ensuring high performance reliability and safety.
Our high-end production facilities and labs ensure total traceability and strict tolerance limits.
Smelting Furnace
Laying-Off / Cutting
Hot Extrusion Line
Precision Cold Drawing
Automatic Straightening
Anti-Oxidation Packaging
Eddy Current Conductance Tester
Chemical Composition Lab
Metallographic Polisher
Electro-Hydraulic Servo Tester
LCD Electronic Universal Tester
Micro-Vickers Hardness Tester
Answers to technical questions commonly asked by materials engineers, CNC specialists, and purchasing managers in Japan.
Sichuan Kepai’s C14500 Tellurium Copper complies fully with both ASTM B301 (US) and Japanese Industrial Standards (JIS H3250 / JIS C1450 equivalent). We guarantee high electrical conductivity (min 93% IACS) and phosphorus-deoxidized structural integrity, which ensures stable behavior in automatic CNC lathe operations and plasma welding environments.
Japan has strict environmental guidelines matching international directives such as RoHS and REACH. Leaded copper alloys face legal limitations due to toxicity. Tellurium Copper provides similar high-speed machinability performance as leaded copper, but does not present the associated toxicity risks, making it the preferred alloy for green manufacturing and export-ready parts.
Yes. We provide comprehensive customization services. Our factory produces round, hexagonal, square, and customized profile shapes in various dimensions. We offer tight straightness tolerances suited for automatic bar feeders in high-speed Swiss-style CNC machines.
For standard catalog products in stock, packaging and customs clearance take approximately 3-5 days. Maritime transit from major Chinese terminals to the Port of Osaka typically takes 5-7 days. Total delivery time from placing an order to receipt at a Kansai-based warehouse is generally within 2-3 weeks for customized production runs.
Every shipment undergoes rigorous testing in our chemical composition lab and mechanical testing department. We use eddy current conductance testing to verify conductivity, and metallographic polishing machines to examine microstructure. We issue a Mill Test Certificate (MTC) detailing chemical composition and physical properties with every batch.
Explore our full catalog of high-conductivity, wear-resistant, and structural copper alloys supporting the Kansai industrial region.
Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to focus on the research and application of advanced new copper alloy materials, contributing to the development of the industry in China, Japan, and globally. We look forward to partnering with manufacturers and distributors throughout Osaka to drive industrial progress.
Kepai