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China Copper CNC Machining Factory: High-Quality Components from Trusted Suppliers
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.
⚡ High Conductivity
🔬 Vacuum Components
📡 Waveguides
🔌 Electronic Applications
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.
⚡ Electrical Conductivity
🔩 Busbars
🔌 Connectors
🏭 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.
⚙️ Bearing Bronze
🛡️ Anti-Galling
🔧 Bushings & Bearings
💪 High Load Capacity
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.
🔨 Cold-Working
🚿 Plumbing Components
🎨 Decorative Hardware
🛡️ Corrosion Resistant
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.
🏎️ High-Speed Machining
⚙️ Gears & Fittings
🔧 Valves
🏭 High-Volume Production
Frequently Asked Questions
QWhat is the difference between Copper 101 and Copper C110 (ETP)?
Copper 101 (OFE) is 99.99% pure and oxygen-free, making it ideal for high-frequency and vacuum applications. Copper C110 (ETP) is 99.9% pure and is the most widely used grade for general electrical components, busbars, and connectors where ultra-high purity is not required.
QWhich copper alloy offers the best machinability for high-volume production?
Copper 360 (Free-Cutting Brass, C36000) is the industry standard for machinability among copper alloys. It enables high-speed machining, produces small broken chips, and delivers excellent surface finishes — making it the top choice for complex, high-volume parts such as gears, valves, and screw machine components.
QWhat makes Copper C932 (SAE 660) suitable for bearing applications?
Copper C932 is a high-leaded tin bronze specifically engineered for bearing applications. Its combination of excellent machinability, anti-galling properties, and high load capacity makes it ideal for bushings, bearings, and thrust washers — especially in environments with steel mating surfaces.
QWhen should I choose Copper 260 (Cartridge Brass) over other brass alloys?
Copper 260 is the best choice when you need superior cold-working and forming capabilities combined with good corrosion resistance. It is widely used for plumbing components, electrical sockets, decorative hardware, and custom machined parts where a balance of formability and durability is required.
QCan copper alloys be used in corrosive environments?
Yes. Copper 260 (Cartridge Brass) offers excellent corrosion resistance and is widely used in plumbing and marine-adjacent applications. Pure coppers like C110 also provide good resistance to atmospheric corrosion. The right alloy should be selected based on the specific corrosive media and operating conditions.
QHow do I select the right copper or copper alloy for my project?
Selection depends on your key requirements: for maximum electrical/thermal conductivity, choose Copper 101 or C110; for best machinability and high-volume production, choose Copper 360; for bearing and wear resistance, choose C932; for cold-forming and corrosion resistance, choose Copper 260. Our team can help you identify the optimal material based on your specific application, tolerances, and environment.
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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