Copper C110 | CU ETP

C110 copper, also widely known as Cu-ETP (Electrolytic Tough Pitch Copper), is a high-purity commercial copper grade renowned for its exceptional electrical conductivity, superior thermal conductivity, reliable corrosion resistance and excellent forming performance. It is the mainstream material for precision conductive and heat-dissipating CNC machined parts.

For precision CNC manufacturing, C110 copper delivers a perfect balance of electrical and thermal performance plus moderate machinability. It is widely applied in electrical connectors, busbars, terminal parts, heat dissipation components and conductive tooling. As a professional C110 copper CNC machining manufacturer, Evefab optimizes tool selection, cutting parameters and processing technology targeting the high ductility and soft characteristics of C110 copper to help customers obtain high-precision, high-quality copper finished parts.

1. Basic Material Information

1.1 Global Material Designation Standards

C110 copper corresponds to multiple international standard designations, which are commonly cross-referenced in industrial drawings and procurement specifications. Evefab strictly verifies material standards for each batch to avoid grade mismatch:

Professional Reminder: Different standard designations cannot be completely equivalent in all product forms and performance parameters. For formal production orders, Evefab recommends clearly specifying the implementation standard, material temper and performance requirements, and verifying materials through official certificates.

1.2 Material Basic Classification

• Material Category: High-purity commercial pure copper

• Copper Type: Electrolytic Tough Pitch Copper (Cu-ETP)

• Common Names: C110 Copper, C11000 Copper, Electrolytic Copper

• Purity: Copper content ≥99.90%

• Core Advantages: Ultra-high conductivity and thermal conductivity, good ductility, moderate CNC machinability

1.3 Market Application Positioning

C110 is one of the most widely used pure copper grades in industrial manufacturing. Different from copper alloys, its ultra-high conductivity makes it irreplaceable in power conduction and thermal management scenarios. It is the preferred material for CNC processing of electrical and thermal functional parts with high precision requirements.

2. Physical Properties of C110 Copper

The following data are typical engineering reference values. The actual physical and mechanical properties of C110 copper depend on material temper, processing form and implementation standards, which are core bases for Evefab's CNC process design and part performance evaluation.

2.1 Electrical Conductivity (Core Advantage)

C110 copper has nearly standard international annealed copper conductivity (100% IACS), which can minimize current loss and contact resistance. It is the best choice for high-current and high-precision conductive parts.

Applicable CNC parts: busbars, electrical terminals, conductive plates, switchgear components, motor and transformer conductive parts, power distribution components.

2.2 Thermal Conductivity Performance

With ultra-high thermal conductivity up to 400 W/m·K, C110 copper has excellent heat transfer and heat dissipation capabilities, far superior to conventional aluminum alloys and alloy steels.

Applicable CNC parts: precision heat sinks, cooling blocks, thermal spreaders, power electronic heat dissipation components, heat transfer fixtures.

2.3 Operating Temperature Characteristics

C110 copper maintains stable electrical and thermal properties in conventional temperature environments, but its mechanical strength will decrease significantly with the rise of temperature. Evefab will comprehensively evaluate the working load, environmental temperature and service life of parts to avoid strength failure of high-temperature working parts.

2.4 Wear and Impact Resistance

C110 copper is soft and high ductile, with low wear resistance. It can adapt to static and low-friction working conditions, but is not suitable for severe abrasive wear and high-load sliding friction scenarios. For wear-resistant parts, Evefab recommends replacing with bronze or professional wear-resistant copper alloys.

3. Chemical Properties of C110 Copper

3.1 Typical Chemical Composition

C110 (Cu-ETP) is high-purity electrolytic copper with controllable trace oxygen elements, ensuring excellent conductivity and processing performance:

3.2 Corrosion Resistance

C110 copper has good natural corrosion resistance in atmospheric and fresh water environments, and will form a protective patina layer on the surface over time. However, it is prone to corrosion in strong oxidizing acid, ammonia-containing, sulfur-containing and high-salt environments.

Evefab Protection Solution: For C110 parts used in humid, coastal and corrosive environments, we provide targeted surface treatments such as passivation, plating and anti-oxidation coating to extend part service life.

3.3 Salt Spray & Marine Environment Adaptability

Bare C110 copper cannot resist long-term salt spray and marine corrosion. For marine equipment and coastal facility parts, Evefab recommends matching professional anti-corrosion processes or selecting higher corrosion-resistant copper alloys according to the service life requirements.

3.4 Surface Oxidation Characteristics

C110 copper is easy to oxidize and discolor in air, especially in high-temperature environments. Oxidation will affect surface finish, contact resistance and welding performance of precision conductive parts. Evefab adopts standardized post-processing cleaning and anti-oxidation protection processes for precision copper parts to ensure stable electrical performance and appearance quality.

3.5 Welding & Connection Performance

C110 copper is compatible with brazing, soldering, resistance welding and TIG welding processes. Due to its ultra-high thermal conductivity, welding heat dissipation is fast and heat input is difficult to control. Evefab formulates special low-heat welding processes for C110 precision parts to avoid welding deformation and ensure assembly accuracy.

4. C110 Copper CNC Machinability Analysis

Overall Machining Difficulty: Moderate

C110 copper is easier to machine than titanium alloy and hardened steel, but its high ductility, low hardness and high thermal conductivity bring unique processing challenges such as burrs, material smearing and continuous chips. Evefab has mature C110 processing technology accumulation to solve various machining pain points stably.

4.1 Recommended Cutting Tools

Tool sharpness is the core key to C110 copper precision machining. Evefab matches professional tool configurations according to processing scenarios:

• Conventional processing: Sharp polished carbide tools with positive rake angle

• Mass production & high finish requirements: PCD diamond tools

• Avoid dull tools: Prevent excessive cutting heat, burrs, material smearing and dimensional deviation

4.2 Reference CNC Cutting Parameters

The following parameters are standard starting values. Evefab will dynamically optimize according to tool diameter, machine rigidity, coolant system and part structure to achieve the best processing effect:

4.3 Common Machining Problems & Professional Solutions

Burr Generation

C110 soft texture is easy to produce burrs on hole edges, groove boundaries and thin-wall edges.
Evefab Solution: Adopt brand-new sharp tools, optimize cutting feed, design reserved chamfers, and match professional secondary deburring process.

Material Smearing

Improper tool and parameters will cause copper material to deform and smear without clean shearing.
Evefab Solution: Use polished carbide tools, appropriately increase cutting speed, optimize chip load and strengthen coolant lubrication.

Long Continuous Chips

High ductility of copper leads to unbroken long chips, affecting chip removal and processing stability.
Evefab Solution: Select tools with chip-breaking structure, adjust feed rate, and use high-pressure coolant to assist chip removal.

Thermal Dimensional Deviation

Large thermal expansion coefficient of copper leads to dimensional change caused by processing temperature rise.
Evefab Solution: Control processing heat, stabilize workshop environment temperature, and perform unified temperature measurement and inspection after parts are cooled.

Thin-Wall Deformation

Low rigidity of thin-wall copper parts is easy to deform under clamping and cutting force.
Evefab Solution: Customize special flexible fixtures, reduce single cutting allowance, adopt layered finishing, and avoid excessive clamping pressure.

4.4 Machining Tolerance & Surface Finish Capability

With standardized process control and high-precision equipment, Evefab stably achieves high precision and high finish processing of C110 copper parts:

• Conventional dimensional tolerance: ±0.05 mm

• Precision key feature tolerance: ±0.01–0.02 mm

• Conventional surface roughness: Ra 0.8–3.2 μm

• Ultra-fine finishing roughness: Ra ≤0.4 μm

4.5 Compatible Machining Processes & Scenarios

C110 copper supports full-process CNC precision processing, and Evefab matches optimal process routes according to part characteristics:

• CNC Milling: Suitable for copper shells, conductive plates, busbars, heat sinks, cooling blocks and fixture parts

• CNC Turning: Suitable for copper shafts, shaft sleeves, rings, cylindrical terminals and conductive sleeves

• Swiss-Type Precision Machining: Specialized for small-diameter pins, contacts, precision sleeves and miniature conductive parts

• Other Processes: Drilling, tapping, boring, reaming, grinding, polishing and deburring

4.6 Machining Scenario Suitability Evaluation

5. Typical Application Scenarios of C110 Copper Parts

5.1 Electrical & Power Equipment

Relying on ultra-high conductivity, C110 is the core material of power conductive parts. Evefab custom processes various precision power components: busbars, electrical terminals, connectors, switchgear parts, grounding components, etc., ensuring low loss and stable power transmission.

5.2 Thermal Management & Heat Dissipation Parts

It is widely used in precision heat dissipation fields such as electronic equipment and power devices. Processed parts include heat sinks, cooling blocks, thermal diffusion plates and power electronic heat dissipation components, meeting high-efficiency heat transfer requirements.

5.3 Semiconductor Equipment Components

Used for semiconductor manufacturing equipment conductive fixtures, thermal plates, precision contact parts and heat transfer blocks. Evefab supports ultra-clean processing and precision finishing to meet high-purity and high-precision requirements of semiconductor equipment.

5.4 Automation & Robot Equipment

Suitable for automation system electrical terminals, conductive blocks, motor matching parts and sensor thermal components, providing stable electrical connection and heat dissipation support for intelligent equipment.

5.5 New Energy & Automotive Equipment

Widely used in new energy vehicle charging systems, battery conductive interfaces, motor electrical components and power electronic heat dissipation parts, adapting to high-current and high-precision new energy equipment working conditions.

5.6 Aerospace Precision Parts

Applied to aerospace equipment electrical connectors, precision conductive components and thermal management parts. Evefab provides full material certification and traceability documents to meet aerospace high-standard manufacturing requirements.

6. Evefab C110 Copper CNC Machining Core Advantages

6.1 Professional Material Selection & Verification

Evefab engineering team selects materials according to part conductivity, heat dissipation, strength and processing requirements, and strictly verifies C110/Cu-ETP raw material standards, temper and composition to avoid material substitution and performance mismatch.

6.2 Customized Mature Processing Technology

Aiming at the ductility and thermal deformation characteristics of C110 copper, we formulate exclusive processes including tool optimization, parameter matching, chip control, burr suppression and thermal stabilization control, realizing stable production from prototype to batch mass production.

6.3 High Precision & High Finish Custom Processing

Support full-process services such as precision milling, turning, drilling, tapping, grinding, polishing and surface cleaning. Cooperate with professional finishing suppliers to provide plating, passivation and anti-oxidation treatments to meet electrical and appearance dual requirements.

6.4 One-Stop Production Service

Complete closed-loop service: Drawing DFM review → Material confirmation → Process planning → Prototype trial production → Quality inspection → Batch production → Surface treatment → Final delivery, greatly simplifying the procurement process for B2B overseas customers.

6.5 Strict Quality Inspection & Traceability

Equipped with CMM three-dimensional detector, roughness meter and thread detection equipment, realizing full dimensional inspection and GD&T verification. Provide official MTR material test reports and batch traceability documents to meet industrial standardized delivery requirements.

C110 Copper CNC Machining Engineering Summary

Final Engineering Recommendation

C110 (Cu-ETP) is the preferred material for CNC machining of precision conductive and heat-dissipating parts. Its ultra-high conductivity and thermal conductivity are irreplaceable in power electronics, new energy, semiconductor and automation equipment.

Due to its high ductility and thermal deformation characteristics, professional process control is required in CNC machining. Evefab relies on rich copper processing experience to solve problems such as burrs, deformation and poor surface finish, providing customers with high-quality, repeatable precision C110 copper parts manufacturing services.

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