C10200 is the ASTM-standard Grade 1 oxygen-free copper (equivalent to China’s national standard TU1). Its core characteristics are ultra-high purity and extremely low oxygen content, which eliminates the risk of hydrogen embrittlement during high-temperature processing. This gives it excellent dimensional stability, making it the preferred material for high-precision copper CNC machining and premium precision copper components.
| Item | Standard / Specification | Key Advantages |
|---|---|---|
| Governing Standards | GB/T 5231-2022, ASTM B152/B152M | Recognized both domestically and internationally — suitable for cross-border machining and integration with high-end equipment |
| Material Grade | C10200 High-Purity Oxygen-Free Copper | Ultra-low oxygen content with no impurity interference, ensuring stable machining performance |
| Applications | Precision copper CNC machining, vacuum components, high-conductivity/thermal precision parts | Meets production requirements for components with tolerances down to 0.01 mm |
C10200 oxygen-free copper is subject to strict controls on copper purity, oxygen content, and harmful impurities. This exceptional purity is the core guarantee behind its outstanding machinability and electrical conductivity, effectively preventing issues such as cracking, warping, and dimensional deviation during copper CNC machining.
| Chemical Element | Mass Percentage (%) | Technical Notes |
|---|---|---|
| Copper + Silver (Cu+Ag) | ≥ 99.97 | Ultra-high base metal purity, ensuring stable electrical/thermal conductivity and machining performance |
| Oxygen (O) | ≤ 0.003 | Eliminates hydrogen embrittlement during high-temperature processing, suitable for a wide range of precision machining processes |
| Total Impurities | ≤ 0.03 | Extremely low impurity levels with no interference in machining, ensuring high consistency across finished parts |
| Lead/Bismuth (Pb/Bi) | Trace-level limits | Effectively prevents cracking during bending and drilling operations in copper CNC machining |
C10200 oxygen-free copper combines excellent electrical/thermal conductivity with strong toughness and structural stability. Its mechanical properties are well-suited to the full range of copper CNC machining processes — cutting, drilling, bending, and deep-hole machining — resulting in high finished-part precision and a stable yield rate.
| Property | Value | CNC Machining Application Value |
|---|---|---|
| Density | 8.94 g/cm³ | Uniform material density enables precise weight allocation and controllable dimensional tolerances |
| Electrical Conductivity | 100–101% IACS | Ideal for high-end precision copper CNC components requiring superior conductivity |
| Thermal Conductivity | 391 W/(m·K) | Rapid heat dissipation significantly reduces thermal deformation and thermal error during machining |
| Tensile Strength (Soft/Annealed) | 200–240 MPa | Flexible material well-suited to precision cutting and forming, resistant to edge chipping |
| Elongation | ≥ 45% | High ductility allows complex CNC-formed structures without cracking or deformation |
Compared to standard red copper, C10200 oxygen-free copper offers higher purity and more stable performance, giving it a clear edge in high-precision machining. This makes it the material of choice for premium custom precision copper CNC machining, suitable for producing complex geometries and ultra-high-precision components across a wide range of applications.
| Machining Advantage | Performance in Practice | Process Optimization Recommendations |
|---|---|---|
| Ultra-High-Precision Forming | Impurity-free material yields smooth cut surfaces with no burrs or tool marks | Enables ultra-precision machining down to 0.01 mm, suitable for miniature precision components |
| Low Thermal Deformation | Fast heat dissipation keeps machining temperatures even, ensuring dimensional stability | Slightly reduce spindle speed during the finishing stage to further improve precision |
| Exceptional Ductility | Easily handles bending, slotting, deep-hole drilling, and irregular-shape cutting | Meets custom CNC machining needs for complex, non-standard copper geometries |
| High Surface Finish | Extremely low surface roughness after cutting, delivering a superior finished texture | Most applications require no secondary polishing, streamlining the production process |
precision copper CNC machining case studies.
Thanks to its ultra-high purity, stable performance, and outstanding copper CNC machining characteristics, C10200 oxygen-free copper is widely used across high-end precision manufacturing. Its core application areas are outlined below:
| Application Field | Core Machined Products | Application Advantages |
|---|---|---|
| Precision Electronics | Conductive terminals, RF components, precision copper connectors | Stable conductivity and high precision, meeting the miniaturization demands of electronic devices |
| Vacuum Equipment | Vacuum seals, vacuum conductive components | Low outgassing and no hydrogen embrittlement, ensuring stable performance in vacuum environments |
| New Energy | Conductive copper busbars for energy storage, precision heat-dissipation components for new energy applications | Excellent thermal/electrical conductivity, high heat resistance, and dimensional stability |
| Instrumentation | Precision copper structural parts for testing equipment, conductive sensor components | High machining precision and strong performance consistency, suitable for precision testing applications |
A: C10200 offers significantly higher purity and extremely low oxygen content, eliminating hydrogen embrittlement and machining-related cracking. This results in far superior precision and surface finish compared to standard red copper, making it ideal for high-precision copper CNC machining.
A: In most precision applications, secondary polishing isn’t necessary — CNC-machined surfaces already meet finish requirements. Only components with extremely high cosmetic/appearance demands may need light final polishing.
A: Thanks to its stable material properties, professional copper CNC machining can achieve ultra-high precision down to 0.01 mm, meeting the requirements of the vast majority of high-end precision components.
A: Ultra-high purity, low deformation, excellent electrical/thermal conductivity, and strong ductility — combined, these deliver high yield rates in machining and make it well-suited for high-end precision manufacturing applications.
Fiona Huang is a Sales Engineer with 16+ years of experience in the mechanical and precision manufacturing industry. She specializes in CNC machining components, custom fasteners, and engineering-driven manufacturing solutions. With strong expertise in international trade and technical project support, she focuses on transforming complex engineering requirements into high-precision, production-ready solutions for global clients.
