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High-Quality Copper CNC Machining Services from China's Leading Suppliers and Factory for Precision Components
Copper & Copper Alloy Material Library
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)
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)
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)
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)
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)
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
1. What is the primary difference between Copper 101 and C110?
Copper 101 is oxygen-free and has a higher purity (99.99%), making it ideal for high-vacuum and high-frequency electronic applications. C110 (99.9%) is the standard grade for general electrical use.
2. Which copper alloy is best for high-speed CNC machining?
Copper 360 (Free-Cutting Brass) is the industry standard for machinability, offering the highest speed capabilities and excellent surface finishes.
3. Why should I choose C932 Bronze for bearings?
C932 (SAE 660) offers excellent anti-galling properties and high load capacity, which reduces friction and wear when used against steel shafts.
4. Is Copper 260 suitable for plumbing applications?
Yes, Copper 260 (Cartridge Brass) is widely used in plumbing due to its excellent corrosion resistance and superb cold-working properties.
5. Can these materials be used for electrical connectors?
Absolutely. C110 is the standard for conductive parts, while C260 is frequently used for electrical sockets and connectors due to its balance of strength and conductivity.
6. What does "Oxygen-Free" mean for electronic copper?
It means the copper has been electrolytically refined to reduce the level of oxygen to .001% or below, preventing embrittlement and ensuring maximum conductivity.
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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