What Are the Common Types of Brass Alloys Used in CNC Turned Parts Production?


The Common Types of Brass Alloys Used in CNC Turned Parts Production

Brass, an alloy composed of copper and zinc, has been widely used in various industries due to its excellent properties, including durability, corrosion resistance, and malleability. In the manufacturing of CNC turned parts, brass alloys play a pivotal role in delivering precise and high-quality components. This article dives into the common types of brass alloys employed in CNC turned parts production and explores their unique characteristics and applications.

1. Admiralty Brass

Admiralty brass, known for its exceptional corrosion resistance, is primarily composed of copper, zinc, and small amounts of tin and arsenic. This alloy is highly resistant to saltwater corrosion, making it an ideal material for marine applications such as shipbuilding, heat exchangers, and condensers. Additionally, Admiralty brass exhibits excellent thermal conductivity, making it suitable for heat exchanger tubes, where efficient heat transfer is crucial.

When CNC turned parts are manufactured from Admiralty brass, they possess remarkable machinability. The material can be effectively shaped, drilled, and tapped without sacrificing its desirable properties. Moreover, Admiralty brass can be easily soldered or brazed, providing flexibility in joining components during the assembly process.

2. Naval Brass

Naval brass, also referred to as commercial bronze, is a popular alloy composed of copper, zinc, and a small percentage of tin. This alloy is widely recognized for its resistance to corrosion from seawater, making it invaluable in marine environments. Naval brass is commonly utilized in the production of various CNC turned components in marine applications like propeller shafts, fasteners, and fittings.

The high strength and ductility of naval brass make it an exceptional choice in CNC turned parts manufacturing. This alloy combines machinability with high tensile and yield strength, ensuring the produced components are not only robust but also mechanically reliable. Moreover, naval brass exhibits excellent resistance to dezincification, a form of corrosion that occurs in brass alloys exposed to specific environments, further enhancing the durability of CNC turned parts.

3. Yellow Brass

Yellow brass, one of the most common brass alloys used in CNC turned parts production, is composed of copper and zinc. It derives its name from its vibrant yellow color, which closely resembles that of pure gold. Yellow brass is a versatile alloy employed in a wide range of applications, including plumbing fittings, electrical connectors, and musical instruments.

The key advantage of yellow brass is its superb combination of machinability and formability. CNC turned parts manufactured from yellow brass exhibit excellent mechanical properties while allowing for intricate patterns and designs. Additionally, yellow brass can be easily polished and plated, providing an aesthetic appeal to CNC turned components in various applications.

4. Red Brass

Red brass, also known as gunmetal, is an alloy primarily comprised of copper, zinc, and a higher concentration of tin compared to other brass alloys. This distinctive composition results in a reddish-brown color, hence the name. Red brass offers excellent corrosion resistance in both fresh and saltwater environments, making it a suitable material for plumbing systems, valves, and fittings.

When utilized in CNC turned parts production, red brass demonstrates exceptional machinability. The alloy exhibits good cutting performance, allowing for accurate shaping and precision in manufacturing intricate components. Furthermore, red brass possesses excellent dimensional stability, ensuring the produced CNC turned parts maintain their shape and size over time.

5. Low-Lead Brass

As environmental regulations and concerns have become more prevalent, the demand for low-lead or lead-free brass alloys in CNC turned parts production has significantly increased. Low-lead brass is carefully formulated to minimize lead content while retaining the essential properties of brass. This alloy is ideal for applications such as plumbing systems, potable water fittings, and food processing equipment.

The primary advantage of low-lead brass lies in its compliance with lead-related regulations and standards, ensuring the safety of drinking water and reducing potential health risks associated with lead exposure. Although low-lead brass has slightly lower machinability compared to traditional brass alloys, modern CNC machining techniques can easily handle its properties while maintaining high precision in the production of turned parts.


In the realm of CNC turned parts production, various brass alloys offer distinct advantages depending on the desired characteristics of the components. Admiralty brass excels in corrosion resistance and thermal conductivity, while naval brass provides exceptional strength and resistance to dezincification. Yellow brass offers versatility in formability and aesthetics, while red brass combines corrosion resistance with excellent machinability. Lastly, low-lead brass addresses the growing demand for lead-free materials while still maintaining the essential properties of brass.

By understanding the unique properties and applications of these common brass alloys, manufacturers can choose the most suitable material for CNC turned parts production. Whether it is for marine environments, plumbing systems, electrical connections, or other specific applications, utilizing the right brass alloy ensures the production of high-quality, durable, and reliable CNC turned parts.


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