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China Copper CNC Machining Suppliers - High-Performance Components from a Leading 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
99.99% Cu
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
99.9% Cu
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 Bronze
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
QWhat is the difference between Copper 101 and Copper C110?
Copper 101 (Oxygen-Free Electronic Copper) is the purest grade at 99.99% Cu, offering the highest electrical and thermal conductivity with minimal oxygen content — ideal for critical electronic and vacuum applications. Copper C110 (Electrolytic Tough Pitch) is 99.9% Cu and is the most widely used general-purpose copper, suitable for busbars, connectors, and standard electrical components.
QWhich copper alloy is best for high-volume CNC machining?
Copper 360 (Free-Cutting Brass, C36000) is the industry standard for machinability. It allows high-speed machining, produces small broken chips, and delivers excellent surface finishes — making it the top choice for high-volume production of complex parts such as valves, fittings, and screw machine components.
QWhat copper alloy should I choose for bushings and bearings?
Copper C932 (SAE 660 High-Leaded Tin Bronze) is specifically designed for bearing applications. It provides excellent machinability, anti-galling properties, and high load capacity, making it ideal for bushings, bearings, and thrust washers that operate against steel surfaces.
QIs Copper 260 (Cartridge Brass) suitable for plumbing and decorative applications?
Yes. Copper 260 (C26000) is a 70/30 brass known for its excellent cold-working properties, good strength, and superior corrosion resistance. It is widely used in plumbing components, electrical sockets, decorative hardware, and custom machined parts where both formability and durability are required.
QHow do I select the right copper or copper alloy for my application?
Selection depends on your primary requirements: for maximum conductivity, choose C101 or C110; for superior machinability in high-volume production, choose C360; for bearing and wear-resistant applications, choose C932; for a balance of corrosion resistance, formability, and strength, choose C260. Our team can help you identify the optimal material based on your specific design and performance needs.
QCan these copper alloys be custom machined to specific dimensions and tolerances?
Yes. All copper and copper alloy materials in our library are available for custom CNC machining to precise dimensions and tight tolerances. Whether you need simple profiles or complex geometries, our machining capabilities cover the full range of these materials to meet your exact specifications.
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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