+86-13928348837
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.
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.
Copper C932 — SAE 660 High-Leaded Tin Bronze
Bearing Grade
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
Q What is the difference between Copper 101 and Copper C110?
Copper 101 (Oxygen-Free Electronic Copper) has a purity of 99.99% Cu and is specifically designed for high-frequency and vacuum applications where maximum conductivity and purity are critical. Copper C110 (Electrolytic Tough Pitch) has a purity of 99.9% Cu and is the standard general-purpose copper used for busbars, connectors, and everyday electrical components.
Q Which 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 widely regarded as the benchmark for machinability among all copper alloys, offering fast cutting speeds, clean chip breakage, and excellent surface finishes — making it ideal for complex, precision parts.
Q What 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 combination of high load capacity, excellent anti-galling properties, and low friction against steel makes it the preferred material for thrust washers, sleeve bearings, and similar wear components.
Q Is Copper 260 (Cartridge Brass) suitable for decorative applications?
Yes. Copper 260 (C26000) is an excellent choice for decorative hardware due to its attractive golden appearance, superior corrosion resistance, and outstanding cold-working properties. It is widely used in decorative fittings, hardware, electrical sockets, and plumbing components that require both aesthetics and durability.
Q How do I choose between Copper 260 and Copper 360 for machined parts?
If your priority is cold-forming, deep drawing, or corrosion resistance, Copper 260 is the better option. If your priority is fast, high-volume machining with tight tolerances and complex geometries, Copper 360 is the superior choice due to its outstanding free-cutting characteristics and chip control.
Q Can these copper alloys be used in electrical conductivity applications?
Pure copper grades — Copper 101 and Copper C110 — are the best choices for electrical conductivity applications, as alloying elements in brass and bronze significantly reduce conductivity. Copper 101 offers the highest conductivity for sensitive electronic uses, while C110 is the standard for general electrical components, busbars, and connectors.
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.
-
Passivation or Chromate Conversion Coating:
-
Powder Coating:
-
Painting:
-
Physical Vapor Deposition (PVD):
Design and Machining Considerations
-
Process Selection:
-
Design Considerations:
-
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.
Ready to Start Your CNC Project?
Send us your drawings to receive professional manufacturing solutions.