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Machinability of Copper 752: Unveiling the Secrets of a High-Performance Alloy

Copper alloys have been widely used in various industries due to their remarkable properties, such as excellent thermal and electrical conductivity, high ductility, and good corrosion resistance. Among these alloys, Copper 752, also known as Nickel Silver, is an exceptional material that has gained popularity in recent years. In this blog post, we will dive deep into the machinability of Copper 752, exploring its characteristics, applications, and tips for successful machining.

What is Copper 752?

Copper 752 is an alloy composed of 65% copper, 18% nickel, and 17% zinc. This unique composition gives it a silvery appearance, which is why it is often referred to as Nickel Silver. Despite its name, Copper 752 does not contain any silver. The alloy is known for its excellent corrosion resistance, high strength, and good formability. It is commonly used in decorative applications, electrical connectors, and musical instruments.

Machinability of Copper 752

Machinability refers to the ease with which a material can be cut, shaped, or otherwise processed using machine tools. Copper 752 has a machinability rating of approximately 60% when compared to free-cutting brass, which is considered 100%. This means that Copper 752 is relatively easy to machine, although not as easy as some other copper alloys.

Factors Affecting Machinability

Several factors contribute to the machinability of Copper 752, including:

1. Composition:The presence of nickel and zinc in Copper 752 improves its machinability compared to pure copper. Nickel increases the strength and hardness of the alloy, while zinc enhances its wear resistance. These properties make Copper 752 less prone to deformation during machining, resulting in better surface finishes and more accurate dimensions.

2. Heat Treatment:Copper 752 can be heat treated to achieve different mechanical properties, which can affect its machinability. Annealing the alloy can improve its ductility and make it easier to machine, while hardening it through cold working or precipitation hardening can increase its strength and wear resistance, making it more challenging to machine.

3. Tool Selection:The choice of cutting tools and their geometry can significantly impact the machinability of Copper 752. Sharp tools with large rake angles and relief angles are recommended for machining this alloy to minimize cutting forces and reduce the risk of built-up edge formation.

Tips for Machining Copper 752

To achieve the best results when machining Copper 752, consider the following tips:

1. Use Sharp Tools:Dull tools can increase cutting forces and cause work hardening, leading to poor surface finishes and reduced tool life. Ensure that your cutting tools are sharp and in good condition before starting the machining process.

2. Optimize Cutting Parameters:Choosing the right cutting speed, feed rate, and depth of cut is crucial for successful machining of Copper 752. Experiment with different parameters to find the optimal combination that minimizes cutting forces, heat generation, and tool wear while maximizing productivity.

3. Apply Coolant:Using a coolant or cutting fluid during machining can help reduce heat generation, minimize tool wear, and improve surface finishes. Ensure that the coolant is applied directly to the cutting area to maximize its effectiveness.

4. Consider Chip Control:Copper 752 can produce long, stringy chips during machining, which can interfere with the cutting process and damage the workpiece or tool. Implementing chip control techniques, such as using chip breakers or high-pressure coolant, can help manage chip formation and improve overall machining performance.

Applications of Copper 752

Due to its unique combination of properties, Copper 752 is used in a wide range of applications, including:

1. Decorative Hardware:The silvery appearance of Copper 752 makes it an attractive material for decorative hardware, such as door handles, hinges, and light fixtures.

2. Electrical Connectors:Copper 752's excellent electrical conductivity and corrosion resistance make it suitable for use in electrical connectors, switches, and contacts.

3. Musical Instruments:The alloy's high strength, good formability, and pleasing appearance make it a popular choice for musical instruments, such as wind instruments and guitar frets.

4. Coins and Medals:Copper

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

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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

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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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