How to Select the Right Brass Alloy for CNC Turned Parts Manufacturing?



Brass is an incredibly versatile alloy that has been widely used in manufacturing a range of products due to its exceptional properties, such as corrosion resistance, excellent conductivity, and machinability. When it comes to CNC turned parts manufacturing, choosing the right brass alloy is crucial to ensure optimal performance and durability. Each brass alloy offers unique characteristics that make it suitable for specific applications. In this article, we will delve into the factors to consider when selecting the right brass alloy for CNC turned parts manufacturing, guiding you through the various options available.

Understanding the Importance of Brass Alloys in CNC Turned Parts:

Brass alloys play a vital role in CNC turned parts manufacturing as they provide the necessary strength, precision, and reliability required for such applications. CNC turning involves the use of computer-controlled machines to shape solid materials, turning them into intricate and precisely crafted components. Brass alloys are particularly well-suited for CNC turning due to their excellent machinability, allowing for smooth and precise operations. The choice of the brass alloy is influenced by several factors, such as the desired mechanical properties, resistance to corrosion, and even aesthetic considerations.

Exploring Different Brass Alloys:

There are several types of brass alloys available, each offering specific characteristics that make them suitable for various applications. Let's take a closer look at some of the most commonly used brass alloys in CNC turned parts manufacturing:

C260 Brass:

C260 brass, also known as cartridge brass or 70/30 brass, consists of 70% copper and 30% zinc. This alloy exhibits excellent ductility, making it highly versatile for CNC turned parts that require extensive shaping or forming. C260 brass offers good corrosion resistance in various environments, making it suitable for applications exposed to moisture. Furthermore, its malleability allows for easy machining and excellent surface finishes, making it an ideal choice for decorative parts.

C360 Brass:

C360 brass, also referred to as free-cutting brass, is a leaded alloy comprising 61.5% copper, 35.5% zinc, and a small amount of lead. The presence of lead enhances the machinability of C360 brass, resulting in improved chip formation and extended tool life during CNC turning. This alloy is well-suited for parts that require intricate designs or close tolerances. C360 brass is commonly used in electrical connectors, fasteners, and plumbing fittings due to its high strength and corrosion resistance.

C464 Naval Brass:

C464 naval brass, composed of about 60% copper, 39.2% zinc, and 0.8% tin, is recognized for its exceptional resistance to corrosion in marine environments. This alloy offers high tensile strength, good ductility, and excellent machinability, making it suitable for CNC turned parts such as fittings and valve components. C464 naval brass's resistance to dezincification and stress corrosion cracking makes it an ideal choice for applications exposed to seawater.

C693 Eco Brass:

C693 eco brass, also known as lead-free brass, has gained popularity in recent years due to its environmentally friendly composition. This alloy comprises approximately 75% copper and 25% zinc. By eliminating lead, C693 eco brass provides a safer alternative without compromising performance. It offers excellent strength, machinability, and corrosion resistance, making it a versatile option for CNC turned parts across various industries, including plumbing, electronics, and automotive.

C377 Brass:

C377 brass, also referred to as forging brass, consists of 59% copper and 40% zinc, with traces of lead. Offering excellent machinability and forgeability, C377 brass is suitable for producing intricate CNC turned parts and components. This alloy exhibits good corrosion resistance and is often used in plumbing fittings, valves, and decorative hardware.

Factors to Consider When Selecting the Right Brass Alloy:

When choosing the appropriate brass alloy for CNC turned parts manufacturing, it's important to consider various factors that align with the specific requirements of your application. Some key factors to keep in mind include:

Mechanical Properties:

Different brass alloys offer varying mechanical properties that determine their strength, ductility, and hardness. Consider the level of strength and toughness required for your CNC turned parts and select an alloy that meets these criteria.

Corrosion Resistance:

The corrosive environment in which the CNC turned parts will be utilized should be taken into account. Certain brass alloys possess enhanced corrosion resistance, making them suitable for applications exposed to moisture, chemicals, or marine environments.


Brass alloys are known for their superior machineability, but some variations may offer better performance during CNC turning operations. Evaluate the machinability characteristics of different brass alloys to ensure efficient and precise manufacturing.

Physical Appearance:

In some cases, the aesthetic appearance of CNC turned parts might be a consideration. Brass alloys can exhibit different colors and finishes, allowing for the selection of an alloy that aligns with the desired appearance requirements.

Additional Considerations:

Apart from the aforementioned factors, there may be additional considerations specific to your application. These may include electrical conductivity, thermal conductivity, or even compliance with regulatory standards. Assess the specific requirements of your CNC turned parts to make an informed decision.


In conclusion, selecting the right brass alloy for CNC turned parts manufacturing is essential to ensure optimal performance, durability, and cost-effectiveness. Understanding the unique properties of each brass alloy and considering factors such as mechanical properties, corrosion resistance, machineability, and physical appearance will guide you in making the appropriate choice. Whether it's C260 brass for decorative components or C693 eco brass for environmentally conscious applications, the versatility and reliability of brass alloys make them indispensable in the world of CNC turned parts manufacturing.


Just tell us your requirements, we can do more than you can imagine.
    Send your inquiry

    Send your inquiry

      Choose a different language
      Tiếng Việt
      Bahasa Melayu
      Current language:English