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China Copper CNC Machining Factory - High-Quality Components by Leading Suppliers for Electrical and Aerospace Industries
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. 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 grade. 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) has a purity of 99.99% Cu and is optimized for critical electronic applications requiring maximum conductivity and minimal oxygen content. Copper C110 (Electrolytic Tough Pitch) has a purity of 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 widely regarded as the benchmark for machinability among all copper alloys. It produces small, broken chips at high cutting speeds and delivers excellent surface finishes, making it the top choice for high-volume production of complex parts such as gears, valves, and fittings.
QWhat makes Copper C932 suitable for bearing and bushing applications?
Copper C932 (SAE 660 High-Leaded Tin Bronze) offers a combination of excellent machinability, strong anti-galling properties, and high load-bearing capacity. Its low friction characteristics against steel make it ideal for bushings, bearings, and thrust washers in demanding mechanical environments.
QWhen should I choose Copper 260 (Cartridge Brass) over other brass alloys?
Copper 260 is the preferred choice when your application requires superior cold-working and forming capabilities combined with good corrosion resistance. It is especially well-suited for plumbing components, electrical sockets, decorative hardware, and machined parts where both formability and durability are important.
QCan these copper alloys be used in corrosive or outdoor environments?
Several alloys in this library offer good corrosion resistance. Copper 260 (Cartridge Brass) provides excellent corrosion resistance for plumbing and outdoor hardware. High-purity coppers like C101 and C110 also resist corrosion well in most environments. For highly aggressive conditions, material selection should be evaluated on a case-by-case basis.
QHow do I select the right copper or copper alloy for my project?
Selection depends on your key requirements: for maximum electrical or thermal conductivity, choose C101 or C110; for the easiest and fastest machining, choose C360; for bearing and wear applications, choose C932; for forming and corrosion resistance, choose C260. Our team can assist you in identifying the optimal material based on your specific application, tolerances, and production volume.
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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