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A Detailed Guide to CNC Machined Brass Parts

Table of Contents

Brass, a copper-zinc alloy, has been revered for its golden-like luster and remarkable properties. Brass has become one of the most popular materials for processing due to its corrosion resistance, thermal conductivity and electrical conductivity. Brass machining is not only cost-effective and easy to machine, but it is also extremely durable and is often used as the material of choice for manufacturing a variety of custom precision parts.

Brass CNC Machining
Brass CNC Machining

Properties of Brass

To truly appreciate the significance of CNC Machined Brass Parts, it’s imperative to understand the material at the heart of this craftsmanship – brass. Brass, a copper-zinc alloy, possesses a unique set of characteristics that make it a prized choice in manufacturing.

  • Attractive Aesthetic:Brass is renowned for its golden-like appearance. Its warm, lustrous hue imparts a timeless elegance to components. This aesthetic appeal makes brass the preferred choice in applications where both function and form are essential.


  • Corrosion Resistance: Brass is inherently resistant to corrosion. The combination of copper and zinc provides excellent protection against environmental factors that would cause other metals to deteriorate. This resistance to corrosion ensures the longevity and reliability of components, even in harsh conditions.


  • Malleability and Ductility: Brass is incredibly malleable and ductile, meaning it can be easily shaped and formed.


  • Thermal Conductivity:Brass is a superb conductor of heat, making it ideal for applications where efficient heat transfer is necessary.


  • Electrical Conductivity: Brass boasts exceptional electrical conductivity, which is vital in electrical and electronic applications.


Key Properties that Make Brass Suitable for Machining

CNC machining requires a material that can be precisely shaped, cut, and milled to meet exact specifications. Brass’s properties lend themselves exceptionally well to machining processes, making it a standout choice for CNC Machined Brass Parts.

  • Machinability
  • Non-ferromagnetic
  • Chip Formation
  • Threadability
  • Low friction
  • Superior machinability
  • Exceptional surface finish


Material Selection for Brass CNC Machining

CNC machining is a versatile process, and the choice of brass material can significantly impact the final product’s performance and characteristics.

C360 Brass

  • Properties:C360, also known as free-cutting or leaded brass, is prized for its exceptional machinability. It contains a small amount of lead, which acts as a lubricant during machining, reducing tool wear. C360 exhibits good corrosion resistance and offers excellent formability.
  • Applications:C360 is a top choice for producing intricate components, such as connectors, electrical terminals, and fasteners, where precision machining is critical. Its ease of machining and excellent threadability make it a go-to option for threaded parts.


C230 Brass

  • Properties:C230 brass boasts high tensile strength and good electrical conductivity. It’s known for its superior corrosion resistance and is highly ductile. This brass type is an excellent conductor of both heat and electricity.
  • Applications:With its corrosion-resistant properties and electrical conductivity, C230 is often used in electrical components, heat exchangers, and various marine applications where resistance to saltwater corrosion is essential.


C220 Brass

  • Properties:C220 brass, also known as low-lead brass, is valued for its balance of machinability, corrosion resistance, and strength. It has a lower lead content compared to C360, making it more environmentally friendly.
  • Applications:C220 is commonly used for architectural and decorative applications, including door hardware, architectural accents, and musical instruments. Its corrosion resistance and pleasing aesthetics make it a suitable choice for such purposes.


C464 Brass

  • Properties:C464, or naval brass, is a high-strength alloy with excellent corrosion resistance, especially in marine environments. It offers good wear resistance, making it suitable for applications where components are subject to friction and wear.
  • Applications:C464 is ideal for marine hardware, shipbuilding, and valve and pump components due to its resistance to seawater corrosion. Its robustness in saltwater environments is unmatched.


C353 Brass

  • Properties:C353 brass, also known as high leaded brass, contains a significant lead content. It excels in terms of machinability and is highly free-cutting, making it easy to work with. It offers good corrosion resistance and a pleasing appearance.
  • Applications:C353 is often employed in architectural and decorative applications, as well as in the production of musical instruments. Its ease of machining and aesthetically pleasing finish are well-suited for artistic and functional components.
CNC Machined Brass Parts
CNC Machined Brass Parts

Factors Influencing Material Selection

When deciding which brass type to use for CNC machining, several factors come into play:

– Mechanical Requirements: Consider the mechanical properties needed for the specific application, such as tensile strength, hardness, and ductility.

– Corrosion Resistance: Assess the environment the component will be exposed to and choose a brass type with the appropriate corrosion resistance properties.

– Machinability: Evaluate the complexity of the part and the required precision. Some projects may benefit from the high machinability of C360, while others may require the strength of C464.

– Electrical and Thermal Conductivity: If the component needs to conduct electricity or dissipate heat, consider the electrical and thermal conductivity of the brass alloy.

– Environmental Regulations: Be aware of any regulations regarding lead content in brass alloys, which may impact material selection.

Advantages and Disadvantages of CNC Machined Brass Parts

CNC Machined Brass Parts offer a plethora of advantages, making them a preferred choice for various industries. However, like any manufacturing process, they also come with their own set of potential drawbacks.



  • Exceptional precision
  • Durability
  • Corrosion Resistance
  • Versatility
  • Tight tolerances
  • Toxicity: Contains lead
  • Relatively expensive
  • Appearance tarnishes easily

Comparison with Other Manufacturing Methods

-Die Casting: Die casting is an alternative to CNC machining for brass parts. It offers faster production, lower material waste, and reduced labor costs. However, die casting may not achieve the same level of precision as CNC machining. The choice between the two methods often depends on the specific requirements of the project.

-3D Printing:3D printing is gaining popularity for producing brass parts. It offers design flexibility and can create intricate shapes. However, the mechanical properties of 3D printed brass may not match those of CNC machined parts, especially in terms of strength and durability.

-Forging: Forging is a process that shapes brass through controlled deformation. It is suitable for high-strength applications and can produce parts with excellent mechanical properties. However, it may not be as precise or versatile as CNC machining.


The synergy between brass’s remarkable properties and the precision of CNC machining is the hallmark of excellence in manufacturing. Brass’s corrosion resistance, malleability, and aesthetic appeal make it an ideal canvas for crafting precision components.

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