Explore our premium custom-engineered copper rods, plates, and wire alloys manufactured to meet critical performance thresholds across defense, EV, and high-frequency communication sectors.
Ultra-high electrical conductivity (>101% IACS) and exceptional thermal transfer metrics, optimized for heavy-duty electric busbars and power distribution components.
Learn More
Engineered for extreme tensile strength, wear resistance, and anti-sparking properties, perfect for high-reliability electrical connectors and hazardous switches.
Learn More
Premium free-machining sulfur copper providing an outstanding machinability rating of 85% with optimized electrical conductivity for rapid mass-production.
Learn More
High-strength phosphor-bronze alloy containing lead, providing excellent low-friction mechanical action for bearings, bushings, and heavy gear systems.
Learn More
Provides a balanced blend of thermal/electrical conductivity and robust mechanical properties. Extremely popular for resistance welding electrodes.
Learn More
Widely recognized for resistance welding and EDM applications. Combines high thermal resilience with superior mechanical wear capacity under extreme temperatures.
Learn More
The gold standard free-cutting brass. Renowned for its exceptional high-speed chip fragmentation and thread-rolling characteristics in high-precision turnings.
Learn More
Designed specifically for vacuum metallurgy and semiconductor substrates, boasting minimal hydrogen embrittlement susceptibility and supreme raw purity levels.
Learn MoreEstablished in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech enterprise dedicated to the R&D, high-precision manufacturing, and global export of high conductivity and high strength free-cutting tellurium copper, sulfur copper, and special beryllium bronze formulations.
Our technical breakthroughs address a historic industry compromise: the friction between ultimate electrical conductivity and high-speed machinability. By engineering precision micro-alloying processes, Kepai produces high-density, oxygen-free tellurium copper that delivers rapid machining output without degrading critical thermal properties.
Supported by advanced manufacturing structures with process control images:
An authoritative breakdown of metallurgical parameters, market forces, and material innovations defining modern power transmission and component manufacturing.
Copper is widely understood as the primary infrastructure metal. However, emerging sectors like grid-scale energy storage, EV propulsion inverters, high-intensity plasma torches, and micro-semiconductor packaging require physical capabilities that exceed traditional electrolytic tough pitch (ETP) copper. Industries are actively shifting from basic raw elements to custom-engineered, multi-component alloys. With the surge of high-frequency AI datacenters and 5G telecommunication networks, custom copper rods have evolved from simple bulk conductors into precision-machined elements designed for high thermal stability and low contact resistance.
Standard pure copper (such as C11000) possesses exceptional electrical conductivity (~101% IACS) but is highly gummy and challenging to machine at high speeds, which can shorten cutting tool lifespans. Machining companies historically used leaded brasses (such as C36000) for fast cycle times, but this compromised electrical transmission capabilities (~26% IACS) and conflicted with environmental standards like RoHS and REACH.
Our specialized micro-alloying process introduces precise amounts of tellurium (yielding C14500) or sulfur (yielding C14700). This produces discrete, finely dispersed particles within the copper matrix. These particles act as natural chip breakers during high-speed turning, raising the machinability index to 85% while keeping electrical conductivity above 93-98% IACS. This allows global manufacturing companies to optimize processing speeds while maintaining high electrical efficiency.
| Alloy Grade | Nominal Composition | Electrical Conductivity (% IACS) | Machinability Rating | Primary Applications |
|---|---|---|---|---|
| C11000 (Pure Copper) | Cu > 99.90% | 101% | 20% | Busbars, Electrical Grounding, Foil Windings |
| C14500 (Tellurium Copper) | Cu + 0.5% Te + 0.008% P | 93% - 98% | 85% | Plasma Electrodes, EV Connectors, Electrical Contacts |
| C14700 (Sulfur Copper) | Cu + 0.35% S + 0.008% P | 90% - 95% | 85% | Precision Switchgear, Screw Machine Parts |
| C17200 (Beryllium Copper) | Cu + 1.9% Be + Co/Ni | 22% - 28% | 20% | High-Stress Springs, Non-Sparking Safety Tools |
| C18150 (Chrome-Zirconium) | Cu + 1% Cr + 0.15% Zr | 80% | 30% | Resistance Welding Cap Electrodes, EDM Wheels |
The industry is transitioning toward ultra-purified, oxygen-free copper matrices combined with micro-alloying techniques. Sichuan Kepai's research and development team is focused on designing oxygen-free, highly conductive tellurium copper (OFT). By lowering oxygen content to under 10 ppm, we minimize the risk of hydrogen embrittlement in high-temperature environments. This process maintains high electrical conductivity and yields a stable grain structure, which is crucial for manufacturing next-generation high-energy physical connectors and aerospace electrical systems.
Sichuan Kepai operates a robust international export network, shipping high-performance copper alloys to industrial buyers worldwide while maintaining strict compliance with international manufacturing standards.
To support global supply chains, Kepai has established a comprehensive quality management system. We hold certifications for ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health and Safety). Our products comply with RoHS and REACH regulations to ensure environmental compatibility in sensitive applications.
Providing high-performance copper alloy supply lines to North America, Europe, East Asia, and emerging industrial hubs.
Our custom copper alloys are designed for high-stress, precision applications across multiple demanding industries.
Tellurium and sulfur copper rods are extensively used to manufacture EV charging pins, power connectors, and battery busbars, supporting high electrical conductivity and low contact resistance.
High thermal stability makes C14500 and C18150 alloys ideal for plasma cutting electrodes and nozzles, maintaining precise structural geometry under intense thermal stress.
Beryllium copper spring contacts, coaxial connectors, and non-magnetic components provide reliable performance in harsh environments, featuring high fatigue resistance and elastic recovery.
How Sichuan Kepai New Materials maintains technological leadership through continuous metallurgy research, advanced processing equipment, and proprietary alloy development.
Our facility operates integrated production lines covering casting, extrusion, drawing, heat treatment, and precision finishing. This system allows us to control chemical compositions within narrow tolerances, ensuring batch-to-batch consistency for critical industrial components.
In addition to standard copper alloys, our R&D division has developed high-conductivity, oxygen-free tellurium copper. This material exhibits reduced oxidation behavior and lower electrical contact resistance than standard grades, making it well-suited for high-voltage DC switchgear.
We participate in the formulation of copper alloy industry standards. Our engineering team continuously refines manufacturing parameters to improve the grain structures of tellurium copper, helping to advance industry-wide material specifications.
We implement green production technologies, employing energy-efficient melting systems and dust recovery units. Our free-cutting sulfur copper (C14700) provides an environmentally conscious alternative to leaded brasses, helping clients meet environmental compliance targets.
Technical answers to common metallurgical and procurement questions regarding custom copper rods and engineering alloys.
Explore our specialized range of high-machinability, high-elasticity, and wear-resistant copper alloys developed for challenging industrial conditions.
Detailed material profile on tellurium-alloyed copper, highlighting its mechanical processing characteristics and high-voltage applications.
Learn More
Premium C14500 tellurium copper rods engineered for high electrical transmission efficiency and clean machining characteristics in automated systems.
Learn More
A free-cutting beryllium copper alloy containing trace lead. Formulated for high-speed machining of complex electronic spring contacts.
Learn More
Oxygen-free tellurium copper with low oxygen levels (<10 ppm) to prevent hydrogen embrittlement in high-temperature vacuum environments.
Learn More
A precipitation-hardened CuNiSiCr alloy providing high strength, electrical conductivity, and thermal softening resistance for connector contacts.
Learn More
High-conductivity copper alloys optimized for power electronics, electrical switchgear, and electric vehicle applications.
Learn More
Custom-manufactured beryllium bronze alloys meeting tight dimensional tolerances for demanding spring applications.
Learn More
Heavy-duty C17200 beryllium bronze rods featuring high hardness and fatigue limits, suitable for demanding heavy machinery applications.
Learn MoreReceive material recommendations, mechanical test certificates, and custom alloy quotes from our engineering division.
Submit Your Technical RFQ
Kepai New Material