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China Copper CNC Machining: Quality Components from Trusted Suppliers and Factory Experts

Copper is renowned as one of the most extensively utilized metal materials in CNC machining, prized for its outstanding thermal and electrical conductivity, exceptional corrosion resistance, and excellent ductility. Its versatility makes it an essential component across various industries, including electrical and power equipment, automotive, medical, and aerospace sectors, As a leading CNC machining manufacturer in China, Yuanwenyu specializes in providing top-notch CNC machining services. Our expertise lies in working with pure copper and a range of high-performance copper alloys. Equipped with cutting-edge CNC milling, turning, and multi-axis machining technologies, our factory is dedicated to producing high-quality copper components that meet stringent conductivity and thermal performance requirements, We offer efficient solutions supported by an intelligent production system, ensuring seamless delivery from prototype validation to small and medium-batch production. As trusted suppliers, Yuanwenyu is here to fulfill your copper machining needs with precision and reliability
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    Product Details

    We stock a wide range of high-purity coppers and key copper alloys, enabling optimal selection for conductivity, machinability, strength, and wear resistance.

    Highest Purity

    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.

    Most Common

    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.

    Bearing Bronze

    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.

    Cartridge Brass

    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.

    Best Machinability

    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
    Q
    What is the difference between Copper 101 and Copper C110 (ETP)?
    Copper 101 (Oxygen-Free Electronic Copper) is 99.99% pure and is specifically processed to eliminate oxygen, making it ideal for high-frequency and vacuum applications. Copper C110 (ETP) is 99.9% pure and is the most widely used general-purpose copper, suitable for electrical components and busbars where ultra-high purity is not critical.
    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, delivering fast cutting speeds, excellent surface finishes, and small chip formation that protects tooling.
    Q
    What makes Copper C932 suitable for bushings and bearings?
    Copper C932 (SAE 660 High-Leaded Tin Bronze) contains lead which acts as a built-in lubricant, reducing friction and preventing galling. Its high load capacity and wear resistance make it an excellent material for bushings, thrust washers, and bearing applications operating against steel shafts.
    Q
    Is Copper 260 (Cartridge Brass) suitable for decorative applications?
    Yes. Copper 260 features an attractive golden appearance combined with excellent corrosion resistance and cold-working properties, making it a popular choice for decorative hardware, architectural trim, and consumer products in addition to functional components like plumbing fittings and electrical connectors.
    Q
    How do I choose between Copper 260 and Copper 360 for my project?
    Choose Copper 260 when your project requires superior cold-forming, deep drawing, or a balance of strength and corrosion resistance. Choose Copper 360 when machinability and production speed are the priority — especially for complex, high-tolerance parts produced in large volumes on screw machines or CNC lathes.
    Q
    Can these copper alloys be used in electrical conductivity applications?
    Copper 101 and C110 are the primary choices for electrical conductivity applications, as they offer the highest conductivity ratings (100% and 101% IACS respectively). Brass alloys like C260 and C360 have significantly lower conductivity due to zinc content and are better suited for structural, mechanical, or decorative roles rather than high-conductivity electrical use.

    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.

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