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Copper CNC Machining Material
Copper (often referred to as Red Copper due to its color) is a highly ductile metal renowned for having the best thermal and electrical conductivity of any commercial metal. It is the gold standard for electrical components and heat management systems. At JUCHENG, we specialize in Copper CNC machining, transforming raw copper bars and plates into precision heat sinks, busbars, and electrical contacts. While copper is soft and "gummy" to machine, our optimized tool paths and sharp cutting strategies ensure burr-free parts with excellent surface finishes.
Copper CNC Machining

JUCHENG's Copper Machining Capabilities

Machining soft copper requires specific expertise to prevent deformation and ensure surface quality. JUCHENG offers:
  • Deformation Control: Pure copper is soft and ductile. We use specialized clamping and low-stress machining techniques to hold tight tolerances without bending the part.
  • High-End Surface Finishes: We provide post-processing services including polishing, passivation (anti-tarnish), and nickel/tin plating to enhance conductivity and corrosion resistance.
  • Material Grades: We stock electrolytic tough pitch (ETP) and oxygen-free (OFE) copper grades to meet different conductivity requirements.
  • Complex Geometries: Our 5-axis CNC centers can machine intricate cooling fins and complex geometries found in advanced thermal management devices.

Advantages of CNC Machining Copper

 
Advantage Detailed Description Key Benefit
Superior Electrical Conductivity Second only to silver, copper is the industry standard for conducting electricity. Essential for connectors, busbars, and electrical contacts.
Excellent Thermal Conductivity Dissipates heat rapidly and efficiently. Ideal for heat sinks, heat exchangers, and cooling blocks.
Corrosion Resistance Forms a stable patina (oxide layer) that protects the metal from further corrosion. Suitable for outdoor and marine environments (though often plated for electronics).
Ductility & Malleability Highly ductile, allowing it to be machined and formed without cracking. Capable of forming complex shapes and thin fins.
Antimicrobial Properties Naturally kills bacteria and viruses on its surface. Useful for medical equipment and public touch surfaces.

Technical Parameters & Material Properties

We predominantly machine the following Copper grades:
 
Grade Category Composition / Standard Detailed Characteristics Ideal Applications
Copper C11000 (ETP) Electrolytic Tough Pitch The most common copper grade (99.9% pure). Excellent electrical and thermal conductivity. Good corrosion resistance and solderability. Electrical busbars, wiring terminals, gaskets, heat sinks, transformer components.
Copper C10100 (OFE) Oxygen-Free Electronic Highest purity (99.99%). Produced in an oxygen-free environment. Offers superior conductivity and ductility compared to C11000. Resistant to hydrogen embrittlement. High-vacuum electronics, cryogenic components, microwave tubes, superconductor applications.
Beryllium Copper (C17200) Copper-Beryllium Alloy A copper alloy with high strength and hardness (comparable to steel) while maintaining good conductivity. Non-sparking and non-magnetic. Springs, non-sparking tools, aerospace bushings, oil & gas drilling components.
C10200 (OF) Oxygen-Free (99.95% Cu) Very high purity with no residual deoxidizers. Excellent conductivity and formability. Slightly lower purity than C10100 but more cost-effective. High-quality electrical conductors, busbars, coaxial cables, glass-to-metal seals.
C12200 (DHP) Phosphorus Deoxidized (99.9% Cu) Deoxidized with phosphorus. Slightly lower conductivity (~85% IACS) but offers superior weldability and brazing properties compared to ETP. Plumbing tubes, heat exchanger coils, hydraulic lines, distilling equipment.
C14500 (Tellurium) Tellurium Copper A free-machining alloy (Machinability rating 85%). Tellurium creates short chips, making it much easier to machine than pure copper, with only slight loss in conductivity (90% IACS). Screw machine parts, welding torch tips, electrical connectors, sprinkler heads.

CNC Machining Guidelines for Copper

  • Tooling: We use very sharp, high-rake carbide tools. Dull tools will plow through the soft copper rather than cutting it, causing work hardening and poor finishes.
  • Chip Control: Copper forms long, stringy chips. We use "chip breaking" tool paths and high-pressure coolant to clear chips from the cutting zone.
  • Coolant: Copper generates significant heat during machining. We use flood coolant to maintain temperature stability and lubricity.
  • Surface Protection: Freshly machined copper tarnishes quickly. We handle parts with gloves and apply anti-tarnish treatments or plating immediately after machining.

Application Scenarios

  • Electronics: Busbars, connectors, electrode holders, microwave cavities.
  • Thermal Management: CPU heat sinks, liquid cooling blocks, heat exchangers.
  • Automotive: Electrical contacts for EVs, radiator components.
  • Medical: MRI components, antimicrobial touch surfaces.

Physical Properties Table

Property C10100 (OFE) C11000 (ETP) C14500 (Tellurium) Unit
Purity 99.99% 99.90% ~99.5% -
Density 8.94 8.89 8.94 g/cm³
Electrical Conductivity 101 100 90 - 95 % IACS
Thermal Conductivity 391 388 355 W/m-K
Tensile Strength 220 - 300 220 - 300 250 - 350 MPa
Elongation 40 - 50 35 - 45 10 - 20 %
Hardness (Rockwell) B40 (Soft) B40 (Soft) B50 (Half Hard) -
Machinability Rating 20% 20% 85% (Free-cutting Brass = 100%)
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Factory Address :
Shenzhen: Fourth Industrial Zone, Xisha Road, Shajing Street, Baoan District, Shenzhen.
Dongguan: 3rd Floor, Building 5, No. 198, Chang'an Section, Guanchang Road, Chang'an Town, Dongguan.
 
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unit 1, Enterprise City,Durham DL16 6JF, united Kindom
 
 
+86 - 186 - 8005 - 3076
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