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China Copper CNC Machining Factory: Trusted Suppliers for High-Performance Copper Components and Alloys
We stock a wide range of high-purity coppers and key copper alloys, enabling optimal selection for conductivity, machinability, strength, and wear resistance.
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Copper 101 / C110 — Oxygen-Free Electronic Copper99.99% 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.
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Copper C110 — Electrolytic Tough Pitch Copper99.9% 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.
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Copper C932 — SAE 660 High-Leaded Tin BronzeBearing 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.
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Copper 260 — Cartridge Brass C2600070/30 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.
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Copper 360 — Free-Cutting Brass C36000Best 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.
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Frequently Asked Questions
1What is the difference between Copper 101 and C110 Electrolytic Tough Pitch Copper?
Copper 101 (Oxygen-Free Electronic Copper) has a purity of 99.99% Cu and is specifically refined to eliminate oxygen, making it ideal for vacuum and high-frequency electronic applications. C110 ETP has a purity of 99.9% Cu and is the most widely used general-purpose copper, offering excellent conductivity and formability for standard electrical and industrial components.
2Which copper alloy is best for high-volume CNC machining?
Copper 360 (Free-Cutting Brass C36000) is the top choice for high-volume CNC machining. It is recognized as the benchmark for machinability among all copper alloys, enabling high-speed cutting, producing clean broken chips, and delivering superior surface finishes — significantly reducing cycle times and tooling costs.
3What copper alloy should I use for bushings and bearings?
Copper C932 (SAE 660 High-Leaded Tin Bronze) is specifically engineered for bearing and bushing applications. Its excellent machinability, anti-galling properties, and high load capacity make it the ideal material for components that operate under friction against steel shafts or surfaces.
4Is Copper 260 Cartridge Brass suitable for corrosion-resistant applications?
Yes. Copper 260 (Cartridge Brass C26000) offers excellent corrosion resistance, particularly in atmospheric and aqueous environments. Its 70/30 copper-zinc composition provides a strong balance of formability, strength, and durability, making it a popular choice for plumbing fittings, connectors, and decorative hardware exposed to moisture.
5Can you supply custom copper alloy parts in small quantities?
Yes. We support both prototype and production runs across our full copper and copper alloy material library. Whether you need a single custom part in Oxygen-Free Copper 101 or a high-volume batch in Free-Cutting Brass C360, our team can accommodate your requirements with flexible order quantities.
6How do I choose the right copper alloy for my application?
The selection depends on your key performance requirements: for maximum electrical or thermal conductivity, choose Copper 101 or C110; for superior machinability in complex parts, choose C360; for corrosion resistance and cold-working formability, choose C260; for bearing and wear-resistance applications, choose C932. Our engineering team is available to help you identify the optimal material for your specific use case.
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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