CNC Milling Brass and Cooper Parts
Copper is a metal with excellent physical and chemical properties, making it easy to machine using CNC. It possesses outstanding qualities such as electrical conductivity, thermal conductivity, ductility, corrosion resistance, and abrasion resistance. Copper is widely applied in industries such as electric power, electronics, energy, petrochemicals, machinery, metallurgy, transportation, light industry, emerging industries, and more. In China, copper ranks second in consumption of non-ferrous metal materials, only behind aluminum.
Brass is a copper-zinc alloy commonly used in CNC turning. It is named for its yellow color, with a copper content ranging from 56% to 68%. Brass has a melting point between 934 and 967 degrees Celsius and offers good mechanical properties and wear resistance. It is used to manufacture precision instruments, ship parts, and gun shells. Precision copper parts, such as those for automotive, medical, and electrical applications, are also commonly produced in relatively large quantities.
CNC Milling Services for Brass and Cooper Parts
JUNYU is one of the leading CNC milling brass parts suppliers in China. With decades of experience in CNC machining, a professional team, and advanced CNC machining equipment, we offer the highest precision CNC milled brass parts. Additionally, we provide product design proposals to meet the specific needs of our customers. Our CNC milled brass parts are manufactured to the highest standards, and as long as part drawings and details are provided, we will process them according to your requirements.
Materials – CNC Milling Brass and Copper
CNC Milling for Brass Materials Parts
360 brass is known as machinable brass, and is also commonly referred to as free-cutting brass or easy-to-machine brass. The machinability of 360 brass is the highest among all copper alloys. It offers excellent cutting performance, reducing tool wear during machining, and is suitable for various machining operations such as turning, milling, drilling, and tapping. It can be precisely machined into parts of various shapes and sizes to meet the needs of different applications. 360 brass is used to manufacture various components such as gears, locks, pipes, and trim parts. Additionally, 360 brass is widely used in electronic hardware and contacts, musical instruments, automatic screw machine parts, bolts, faucet seats, fluid connectors, and other fields.
| Brass | ||||
| Yield Strength (tensile) | Elongation at Break | Hardness | Density | Maximum Temp |
| 15,000 psi | 53% | Rockwell B35 | 0.307 Ibs / cu. in. | 1650°F |
CNC Milling for Bronze Materials Parts
932 bronze is a high-performance copper alloy, also known as CDA932 or C93200 bearing bronze. It has high strength and hardness, allowing it to withstand significant mechanical loads. Due to its content of tin, lead, and zinc, it offers excellent wear and corrosion resistance. It is most commonly used in bearings, bushings, and thrust washers.
| Bronze | ||||
| Yield Strength (tensile) | Elongation at Break | Hardness | Density | Maximum Temp |
| 18,000 psi | 10% | Rockwell B34 | 0.322 Ibs / cu. in. | 500°F |
CNC Milling for Copper Material Parts
The excellent thermal and electrical conductivity of 101 and 110 copper alloys makes them a natural choice for bus bars, wire connectors, and other electrical applications. 101 copper (also known as superconducting copper) is more conductive due to its high purity (99.99% copper) but is more cost-effective because 110 is easier to process.
110 Copper
The full name of 110 copper is C11000, which belongs to the category of electrolytic tough copper (ECP). It has good electrical conductivity, thermal conductivity, corrosion resistance, and excellent machinability.
C11000 copper contains approximately 99.9% copper and is low in oxygen content. Due to the low oxygen content, it exhibits excellent electrical conductivity, superior ductility and toughness, good corrosion resistance, and excellent weldability.
| Tensile Strength, Yield （MPa） | Coefficient of Thermal Expansion: | Density (p) | Melting Point | Elongation (ε) at break |
| 32,000 psi | 0.0000098°F (68-572°F） | 0.321-.323 lbs/cu in | 1949°F | 55% (in 2″) |
C10100 Copper
C10100 copper is oxygen-free copper with a purity of over 99.99%, containing extremely low levels of impurities. It has excellent electrical and thermal conductivity, good machinability, and corrosion resistance. It can be applied in high-end manufacturing industries: in the production of precision instruments, meters, sensors, and other devices, it serves as a key material for conductive and thermal components, helping to improve the accuracy and stability of equipment.
| Tensile Strength，Yield (MPa) | Hardness VPN | Density(p) | Melting Point | Elongation (ε) at break |
| 200-400 MPa | 40-120 | 8.92 g/cm3 | 1083°C | 5-50% |
Materials Properties
High-Speed Machining Brass offers excellent machinability, often referred to as 100% machinability. The mechanical properties of this alloy include high strength, high tensile strength, and shear resistance.
Precision Machining and Dimensional Stability
Brass is well-known for its dimensional stability and is well-suited for manufacturing parts with strict tolerances.
High Workpiece-to-Tool Compatibility
In brass CNC machining, chip formation is negligible, which minimizes tool wear and tear.
Higher Productivity and Profit
As a fast and precise machining process, brass CNC machining increases process efficiency.
Brass is also a cost-effective material, which benefits the overall capital investment in machining materials.
Eco-Friendly CNC Milling of Brass and Copper Parts
Brass, a copper alloy, retains the chemical and physical properties of natural copper, with enhanced properties in this alloy. As a result, the material used in this process is eco-friendly.
