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Oxygen-Free Copper: The Ultimate Guide to Machinability and Applications

Oxygen-free copper (OFC) is a type of high-purity copper that is widely used in various industries due to its excellent machinability and conductivity properties. In this comprehensive guide, we will delve into the world of oxygen-free copper, discussing its properties, machinability, and applications. With over 1000 words, this blog post will provide you with a wealth of information on the subject.

What is Oxygen-Free Copper?

Oxygen-free copper is a type of copper that has had most of its oxygen content removed, resulting in a purity level of 99.95% or higher. This is achieved through a specialized refining process that removes impurities and oxygen from the copper. The absence of oxygen in the metal significantly improves its machinability, electrical conductivity, and resistance to corrosion.

Properties of Oxygen-Free Copper

Oxygen-free copper boasts several properties that make it ideal for various applications, particularly in industries that require high electrical conductivity and excellent machinability. Some of these properties include:

1. High Electrical Conductivity:OFC has a high electrical conductivity, making it an excellent choice for applications that require efficient transmission of electrical signals, such as in the electronics and telecommunications industries.

2. Excellent Machinability:Oxygen-free copper is easier to machine than other types of copper due to its lack of oxygen content. This results in a smoother surface finish and reduced tool wear, making it a popular choice for manufacturers.

3. High Thermal Conductivity:OFC has a high thermal conductivity, meaning it can efficiently transfer heat. This property is beneficial in applications that require effective heat dissipation, such as in heat sinks and radiators.

4. Corrosion Resistance:Oxygen-free copper is more resistant to corrosion than other types of copper, making it suitable for use in harsh environments and applications where corrosion resistance is essential.

5. Ductility and Formability:OFC is highly ductile and formable, allowing it to be easily shaped and formed into various configurations without cracking or breaking.

Machinability of Oxygen-Free Copper

One of the most significant advantages of oxygen-free copper is its excellent machinability. The absence of oxygen in the metal reduces the formation of chips and burrs during machining, resulting in a smoother surface finish and longer tool life. This makes it an attractive option for manufacturers who are looking to improve their machining processes and reduce costs.

When machining oxygen-free copper, it is essential to use sharp cutting tools and appropriate cutting speeds to achieve the best results. The use of coolant is also recommended to help dissipate heat and prolong tool life. Additionally, it is essential to ensure that the workpiece is adequately supported and clamped to prevent vibrations and movement during machining.

Applications of Oxygen-Free Copper

Oxygen-free copper's unique properties make it suitable for various applications across different industries. Some of these applications include:

1. Electronics Industry:OFC is widely used in the electronics industry due to its high electrical conductivity. It is commonly found in printed circuit boards, connectors, and other electronic components that require efficient electrical signal transmission.

2. Telecommunications:Oxygen-free copper is used in the telecommunications industry for the production of high-quality cables and wires. Its high electrical conductivity ensures efficient signal transmission with minimal signal loss.

3. Automotive Industry:OFC is used in the automotive industry for the production of various electrical components, such as wiring harnesses, connectors, and sensors. Its excellent machinability and corrosion resistance make it an ideal choice for these applications.

4. Aerospace Industry:Oxygen-free copper is used in the aerospace industry for the production of electrical components and wiring systems that require high conductivity and corrosion resistance.

5. Renewable Energy:OFC is used in the renewable energy sector, particularly in solar panels and wind turbines, for the production of high-efficiency electrical components and wiring systems.

6. Musical Instruments:Oxygen-free copper is used in the production of high-quality musical instruments

CNC Copper Machining

CNC Machining Copper Material is good electrical conductivity, thermal conductivity, it is soft and good for machining as it has high plasticity, it is easily and rapidly to carry out desired shape as machining cutter can run faster than other steel materials, and also reach high precision.

Copper has a shiny reddish-orange finish, which varies slightly based on the surface finish method. Copper can be media-blasted and polished to achieve many different cosmetic surface finishes.

CNC Machining Copper Parts are widely used in the manufacture of electrical wires, cables, electric brushes, electric spark, and other electrical devices and products.

CNC Copper Machining

Benefits of CNC Copper Machining

1/ CNC Machining Copper Parts are excellent in electricity conductivity, supporting very good electric function

2/ CNC Machining Copper Parts are soft, easy to design into different shape, also suitable for many processes

3/ Copper is easy for cutting and machining, its production efficiency is much higher than steel series

4/ Good propriety for bending and shaping

5/ Heat transferring function very good, high resistance, temperature stability, long durable using

6/ Stable surface, non-surface treatment is durable, electroplating is also used on copper parts

CNC Copper Machining

Composition And Property of CNC Machining Copper

Copper Property Alloy Type Content Melting Point Hardness Tensile Strength Density
Cu-based Zn, Sn, Si, Al, Ni 1083°C HB35-45 Low 8.9 g/cm3

Common Materials Code of CNC Machining Copper

Copper Alloy Workable Processes Surface Finishing for Copper Parts Materials Code
CNC Turning, CNC Milling, CNC Drilling, Molding, Forging, Fabrication, Welding, etc. Passivation, Anodizing, Plating, Chemical Polishing, etc. Copper 110
Copper 101
Copper 145
other more Copper Alloy

Asianstar: Professional CNC Machining Supplier

From year of 2005, Asianstar Company establish the CNC Machining Factory in Guangdong Province, China.
We mostly provide CNC Turning, Milling, Drilling, Grinding, and Multi Machining processes service on various materials.
With the Belief of becoming a key supplier in the supply-chain of Precision Components, we strictly control our product quality, keep high precision on our components production, buildup the whole-process QC System and submit the satisfaction for every order.
By long term development, we have buildup partnership with world-wide clients, supporting our partners in Designing, Optimizing, Producing and Testing on each type of components.


Advantages of Asianstar CNC Copper Machining

Strong Facilities

Asianstar many CNC and stamp machines allow us to produce various copper parts, different sizes, and structures are all well done by suitable solution

Long-term Skills

Asianstar professional engineers team has experience from year 2005, producing copper parts for world wide electric products

Stable Quality

Asianstar QC system and QC tools guarantee our products are perfect result. We have procedures to control copper parts quality during production

Competitive Price

Asianstar aim to buildup partnership with clients, always choose best suitable facilities to carry out the components in competitive prices


CNC Brass Machining


CNC Machining Brass material is used for wide range components, we support clients to produce a variety of parts such as gears, locks, electronics, pipe fittings, etc.

CNC Copper Machining


CNC Machining Copper material is soft and easy to machining on different shape of components. We mostly produce copper components for electric devices by machining and stamping

CNC Aluminum Machining


CNC Machining Aluminum materials is one of our most used materials. We support clients to turning, drilling or milling on aluminum material from size 0.5mm to 470mm

CNC Stainless Steel Machining

Stainless Steel

CNC Machining Stainless Steel are common material for wide range components, we produce Stainless Steel turning parts, milling parts, high smoothness components, etc.

CNC Titanium Machining


CNC Machining Titanium material brings components superb features, we use titanium to produce high precision work-piece for clients from aircraft, aerospace, medical devices

CNC Plastic Machining


Our CNC Machining Plastic materials includes ABS, HDPE, LDPE, Nylon, POM, Peek, Polycarbonate, etc. We produce them in high precision and high smoothness.


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