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China Copper CNC Machining: High-Quality Copper Components from Reliable Suppliers and Factory
We stock a wide range of high-purity coppers and key copper alloys, enabling optimal selection for conductivity, machinability, strength, and wear resistance.
Copper 101 / C110 — Oxygen-Free Electronic Copper
Highest Purity
The purest commercially available grade (99.99% Cu). Offers exceptional electrical and thermal conductivity. Primarily used for high-frequency conductors, waveguides, vacuum components, and other critical electronic applications where high purity is essential.
Copper C110 — Electrolytic Tough Pitch Copper
Most Common
The most common and widely used copper (99.9% Cu). Provides excellent electrical conductivity and formability. The standard choice for electrical components, busbars, connectors, and general conductive parts.
Copper C932 — SAE 660 High-Leaded Tin Bronze
Bearing Grade
A bearing bronze with excellent machinability, good anti-galling properties, and high load capacity. Ideal for bushings, bearings, thrust washers, and other applications requiring low friction and wear resistance against steel.
Copper 260 — Cartridge Brass (C26000)
70/30 Brass
A classic 70/30 brass with superb cold-working properties, good strength, and excellent corrosion resistance. Widely used for plumbing components, electrical sockets, connectors, decorative hardware, and custom machined parts requiring a balance of formability and durability.
Copper 360 — Free-Cutting Brass (C36000)
Best Machinability
Known as the standard for machinability among copper alloys. Offers high-speed machining capabilities, producing small, broken chips and excellent surface finishes. The preferred choice for high-volume production of complex parts like gears, fittings, valves, and screw machine components.
Frequently Asked Questions
Q
What is the difference between Copper 101 and Copper C110?
Copper 101 (Oxygen-Free Electronic Copper) has a purity of 99.99% Cu, making it ideal for ultra-sensitive electronic and vacuum applications. Copper C110 (Electrolytic Tough Pitch) has a purity of 99.9% Cu and is the most widely used general-purpose copper for electrical components, busbars, and connectors.
Q
Which copper alloy is best for high-volume CNC machining?
Copper 360 (Free-Cutting Brass, C36000) is the top choice for high-volume CNC and screw machine production. It offers the highest machinability rating among copper alloys, producing clean chips and excellent surface finishes at high speeds, which significantly reduces cycle times and tooling costs.
Q
What copper alloy is recommended for bushings and bearings?
Copper C932 (SAE 660 High-Leaded Tin Bronze) is specifically engineered for bearing and bushing applications. Its excellent anti-galling properties, high load capacity, and low friction against steel make it the industry standard for bushings, thrust washers, and wear components.
Q
Is Copper 260 (Cartridge Brass) suitable for plumbing and decorative parts?
Yes. Copper 260 is a classic 70/30 brass renowned for its excellent corrosion resistance, superb cold-working properties, and attractive appearance. It is widely used for plumbing fittings, electrical sockets, decorative hardware, and any custom machined part that requires a combination of formability and durability.
Q
How do I choose between brass alloys (C260 vs. C360) for my project?
If your project involves significant cold-forming, bending, or drawing operations, Copper 260 (Cartridge Brass) is the better choice due to its superior formability. If your primary requirement is fast, precise CNC machining of complex parts in high volumes, Copper 360 (Free-Cutting Brass) is the preferred option for its unmatched machinability.
Q
Can copper alloys be used in high-frequency or RF applications?
For high-frequency, RF, and microwave applications, Copper 101 (Oxygen-Free Electronic Copper) is the preferred material. Its 99.99% purity ensures minimal signal loss and maximum electrical and thermal conductivity, making it ideal for waveguides, vacuum components, and precision electronic assemblies where performance cannot be compromised.
Finishes and Post-Processing Options
The zinc alloy substrate is highly suitable for various surface treatments to enhance decoration, protection, or functionality:
Electroplating: Such as chrome, nickel, gold, or silver plating, providing a highly decorative appearance, excellent wear and corrosion resistance. This is the most common choice.
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Passivation or Chromate Conversion Coating:
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Powder Coating:
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Painting:
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Physical Vapor Deposition (PVD):
Design and Machining Considerations
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Process Selection:
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Design Considerations:
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Material Selection:
Zamak 3 and 5 are suitable for the vast majority of general-purpose parts requiring good appearance and strength; ZA-8 is better for wear and bearing applications; for making rapid tooling, choose specialized alloys like Kirksite.
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