C11000 vs C10200 for vacuum electronics?

For high-vacuum electronics and high-temperature brazing, C10200 (Oxygen-Free) copper is the technical requirement. While C11000 copper offers identical conductivity at 101% IACS min, its oxygen content (0.02% to 0.04%) causes "outgassing" in a vacuum and internal cracking during brazing. For standard power distribution where these extreme conditions are absent, c11000 material is the more economical and widely available choice. You can evaluate our available stock of conductive plates and profiles on the C11000 product overview.

The oxygen in electrolytic tough pitch copper exists as cuprous oxide particles. In a high-vacuum environment, especially under heat, these oxides can release trapped gases, contaminating the vacuum and degrading the performance of sensitive electronic tubes or particle accelerators.

As explained in our technical guide Is C110 copper oxygen free, C10200 is produced in a non-oxidizing atmosphere to eliminate these particles. If your project involves custom cut C11000 copper plate for a standard electrical panel, oxygen is a non-issue. However, for a vacuum chamber component, the high purity of oxygen-free copper is a mandatory specification. You can verify these chemical limits in our chemical composition of C11000 alloy.

C11000 (ETP) vs. C10200 (OF) Chemical Specs

Request Batch MTC

In the manufacturing of heat exchangers and electronic housings, brazing is a common joining method. If you heat C11000 copper sheet in a flame containing hydrogen, the material will suffer from hydrogen embrittlement. The hydrogen reacts with the internal oxygen to form steam, creating microscopic voids that destroy the mechanical strength of the part.

C10200 is "immune" to this phenomenon, making it the preferred grade for complex brazed assemblies. For a comparison with the even higher-purity C10100 grade, you can check our analysis on the difference between C11000 and C10100. For 90% of industrial t2 copper applications using mechanical fasteners, C11000 remains the standard.

Mechanical and Fabrication Properties

Consult Material Expert

From a B2B procurement standpoint, the c11000 copper price is the industry baseline. C10200 (Oxygen-Free) copper typically carries a 10% to 20% price premium because it requires specialized vacuum or inert gas casting.

Unless your application specifically involves high-vacuum sealing, hydrogen brazing, or ultra-high-frequency signals, C11000 provides identical electrical and thermal performance at a lower cost. For structural parts or standard grounding bars, paying the premium for oxygen-free copper provides no functional benefit.

1. Can C11000 be used for high-end audio cables?
While audiophiles often prefer oxygen-free copper (C10200 or C10100) due to a perceived reduction in signal distortion, C11000 is more than sufficient for standard high-fidelity audio applications.

2. How do I distinguish C11000 from C10200 visually?
They look identical. Identification requires a c11000 copper data sheet or an MTC that explicitly lists the oxygen content in parts per million (ppm).

3. Is C10200 more bendable than C11000?
In the same temper, C10200 is slightly more ductile because it lacks the cuprous oxide particles at the grain boundaries. However, for most industrial bending, C11000 is perfectly capable.

4. What is the equivalent of C10200 in Europe?
The equivalent is Cu-OF (CW008A). Most international buyers use this designation interchangeably with ASTM C10200.

5. Does C10200 have higher conductivity than C11000?
Not necessarily. Both grades typically hit the 101% IACS mark. The primary reason to buy C10200 is for its purity and lack of oxygen, not for a massive gain in conductivity.

Customization Note:

Custom Dimensions: We provide precision cutting and slitting services to meet your specific project requirements.

Tempers Available: Soft (O), Half-Hard (H02), Full Hard (H04), and Spring Hard (H08).

Surface Finish: Bright annealing, Polished, or Plated (Tin, Silver, Nickel) upon request.

Maximum protection against oxidation, moisture, and transit damage.

1. Anti-Oxidation Protection

VCI Paper & Moisture-Proof Film: Every order is vacuum-sealed or wrapped in anti-corrosion materials to ensure the copper remains bright and tarnish-free during sea freight.

2. Reinforced Structural Support

Seaworthy Wooden Crates: We use reinforced, fumigation-free wooden cases (ISPM-15) and steel strapping for rods, tubes, and heavy plates to prevent bending or surface scratches.

3. Secure Handling & Loading

Forklift-Ready Pallets: All materials are secured on standardized export pallets for easy unloading and maximum stability in containers.

4. Clear Identification

Professional Labeling: Each package includes detailed labels with heat numbers, specifications, and net weight for efficient inventory management.

1. Core Production Equipment

Up-casting & Continuous Casting Lines: Ensures high-purity oxygen-free copper rods and wires with uniform grain structure.

High-Precision Cold/Hot Rolling Mills: Automated thickness control for copper plates and strips with tolerances within ±0.01mm.

Large-Scale Extrusion & Drawing Machines: Capable of producing seamless copper tubes and rods in diverse diameters and shapes.

Atmospheric Controlled Annealing Furnaces: Bright annealing process to achieve specific tempers (Soft, Half-hard, Hard) without surface oxidation.

2. In-House Testing Center

Direct-Reading Spectrometers: Instant chemical composition analysis to guarantee Cu purity and precise alloying (Brass, Bronze, etc.).

Universal Tensile Testers: Verifying mechanical properties including tensile strength, elongation, and yield strength.

Eddy Current & Ultrasonic Testing: 100% non-destructive inspection for tubes and rods to detect internal cracks or flaws.

Conductivity & Hardness Testers: Ensuring electrical conductivity (IACS) and Vickers/Rockwell hardness meet international standards (ASTM, EN, DIN).

Get Fast Quote & Logistics Plan