Copper C11000

Copper C11000, universally known as Electrolytic Tough Pitch (ETP) copper, is the industry standard for electrical conductivity and thermal management. With a minimum purity of 99.90% and a minimum electrical conductivity of 100% IACS, it is the premier choice for high-voltage busbars, switchgear, and power distribution components. At Jucheng Precision, we specialize in the high-volume CNC machining of C11000, utilizing advanced tool geometries and high-speed 5-axis milling to overcome its inherent "gummy" nature. Whether you need complex liquid cooling blocks or precision-plated automotive busbars, our IATF 16949 certified production lines ensure your copper components are delivered with exceptional precision and surface quality.

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Copper C11000

C11000 Machining Capabilities

Capability Technical Description Jucheng Advantage
High-Volume Busbar Production CNC milling and drilling of C11000 flat bars for power distribution systems and EV battery packs. Our automated setups allow for rapid production of thousands of busbars monthly with perfect edge quality and hole alignment.
Complex 5-Axis Milling Using 5-axis machines to create intricate copper heat sinks and liquid cooling blocks from solid C11000 blocks. Jucheng achieves high surface area fin patterns while maintaining tight tolerances, critical for efficient thermal management.
Precision Power Turning Turning large diameter copper contacts and switchgear components with smooth surface finishes (Ra 0.8). Ensures maximum surface contact for high-voltage transmission, reducing electrical resistance and heat buildup.
Custom Surface Plating Integrated secondary services including Tin Plating, Nickel Plating, and Silver Plating. Prevents the natural oxidation of C11000 in harsh industrial environments while maintaining 100% electrical performance.

Fabrication Guidelines for C11000 ETP Copper

Managing Ductility:
C11000 is highly ductile and “soft,” which can lead to burr formation. Tip: We use specialized high-rake tooling and high-speed spindles to ensure clean, burr-free edges without the need for manual deburring.

Chip Evacuation:
ETP copper produces long, stringy chips that can wrap around the tool. Tip: We utilize high-pressure flood coolant and peck-drilling cycles to break chips into manageable pieces, ensuring safe automated production.

Thermal Control:
Copper expands significantly when heated during machining. Tip: We monitor part temperature strictly and use optimized tool paths to keep the workpiece cool, guaranteeing dimensional consistency across large batches.

Workholding Strategies:
To prevent marring the soft reddish surface, we use custom plastic-faced jaws or vacuum tables for holding thin C11000 busbar plates during high-speed milling.

Primary Applications

Electrical Power Distribution
Busbars, switchgear components, and transformer terminals where 100% IACS conductivity is the primary requirement.

Electric Vehicles (EV)
Battery interconnects, charging port pins, and motor winding components requiring efficient power transfer and thermal cooling.

Renewable Energy
Components for solar inverters and wind turbine grounding systems that must withstand outdoor exposure (when plated).

Industrial Machinery
Resistance welding electrodes and heavy-duty grounding straps for factory automation equipment.

Properties

Density 8.89 g/cm³
Tensile Strength 220 - 380 MPa
Yield Strength 69 - 330 MPa
Hardness 45 - 95 HB (Brinell)
Elongation at Break 25 - 45%
Thermal Conductivity 388 W/m-K
Electrical Conductivity 100% IACS
Melting Point 1083 °C
Machinability Rating 20%
Purity Level 99.90% Cu
Max Part Size 2000 x 800 x 600 mm