No, C11000 copper is not oxygen-free. It is internationally classified as Electrolytic Tough Pitch (ETP) copper. While it boasts a high purity of at least 99.90%, it contains a controlled oxygen content typically ranging from 0.02% to 0.04% (200-400 ppm). For B2B buyers looking for various shapes and dimensions, our full range is available on the C11000 product overview. The oxygen in this grade is essential for achieving its high electrical conductivity, but it also defines the material's thermal processing limits.
Why oxygen content matters in C11000 (T2 copper)
The oxygen in cu etp copper is a deliberate result of the refining process. During casting, oxygen is used to scavenge impurities like sulfur, ensuring the material reaches an electrical conductivity of 101% IACS. In global markets, this grade is frequently traded as t2 copper.
While oxygen is beneficial for conductivity, it creates a risk of hydrogen embrittlement if the metal is heated above 400°C in a reducing atmosphere. If your project involves high-temperature fabrication, you should review the chemical composition of C11000 alloy to understand the specific oxide distribution within the matrix.
C11000 (Cu-ETP) Technical Specifications
| Property | Specification | Industrial Value |
| Copper Purity | Cu + Ag | 99.90% Min |
| Oxygen Content | O | 0.02% - 0.04% |
| Conductivity | Electrical |
≥≥ 101% IACS |
| Temper State | cu etp r240 | Half-Hard (65-95 HV) |
| Standard | astm b152 c11000 pdf | Industrial Standard |
C11000 vs. Oxygen-Free Grades
For engineers, the presence of oxygen is the primary reason to distinguish C11000 from oxygen-free grades like C10100. When c11000 copper is exposed to hydrogen at high temperatures, the hydrogen diffuses into the metal and reacts with the cuprous oxide to form internal steam pockets, leading to structural failure.
If your application involves vacuum electronics or hydrogen brazing, you must switch to an oxygen-free alternative. We recommend checking the difference between C11000 and C10100 before finalizing your purchase order. However, for a standard c11000 electrical copper busbar, the oxygen content is perfectly acceptable and provides the most cost-effective solution.
ETP Copper vs. Oxygen-Free (OF) Copper Comparison
| Feature | C11000 (ETP) | C10100 (OFC) |
| Oxygen Level | 200-400 ppm | < 10 ppm |
| Welding | Not Recommended | Excellent |
| Brazing | Oxidizing only | All Atmospheres |
| Lead Product | C11000 copper bar | Vacuum Tubing |
| Cost Profile | Economic/Standard | Premium Price |
Fabrication Performance of C11000 Sheet and Plate
Despite the oxygen content, c11000 copper properties allow for excellent cold working and ductility. The oxide particles are finely dispersed and do not interfere with standard bending or punching. This makes it the preferred choice for a c11000 copper sheet manufacturer supplying the power distribution industry.
If you are manufacturing a C11000 copper sheet for electrical enclosures, you can rely on its superior thermal and electrical properties. For specific bending radius requirements, consult our guide on whether C110 copper is bendable to prevent surface cracking during fabrication.
FAQ
1. Does the oxygen in C11000 reduce its conductivity?
No. In fact, the oxygen helps "clean" the copper matrix of dissolved impurities. This allows C11000 to consistently maintain 101% IACS conductivity, which is equivalent to or better than many oxygen-free grades.
2. Is C11000 considered "Pure Copper"?
Yes. Even with 400 ppm of oxygen, it is classified as commercially pure copper. It meets the 99.90% purity requirement set by ASTM and international standards.
3. Can I weld C11000 copper?
Welding is generally not recommended due to the risk of porosity and cracking. For applications requiring high-strength welded joints, deoxidized or oxygen-free copper is a safer choice.
4. Why is C11000 the standard for busbars?
Because it offers the best balance between conductivity and cost. The oxygen content does not impact performance at standard operating temperatures of electrical switchgear.
5. How can I confirm the oxygen level?
You should always request a Mill Test Certificate (MTC). This document will verify the chemical composition and ensure the material meets ASTM B152 or B187 standards.
6. Does oxygen affect the price of the material?
Yes. Because C11000 is easier to refine than oxygen-free copper, the c11000 copper price is significantly lower, making it the most popular grade globally.
Product Specifications & Range
| Product Category | Common Grades (Alloys) | Size Range (Dimensions) | Standards |
| Copper Rods | C11000, C12200, C10200, C14500 | Diameter: 3mm – 400mm<br>Shape: Round, Hexagonal, Square | ASTM B187, EN 12163 |
| Copper Tubes | C11000, C12200 (DHP), C10200 (OF), C27200 | OD: 2mm – 219mm<br>Wall Thickness: 0.2mm – 20mm | ASTM B280, EN 12735 |
| Copper Plates | C11000 (ETP), C10200, C12200 | Thickness: 0.1mm – 150mm<br>Width: Up to 2500mm | ASTM B152, DIN 1751 |
| Copper Wires | C11000, C10200, Brass Wire | Diameter: 0.05mm – 10.0mm<br>Form: Spool or Coil | ASTM B3, EN 13602 |
| Copper Strips | C11000, C12200, C26800 (Brass) | Thickness: 0.05mm – 3.0mm<br>Width: 5mm – 610mm | ASTM B19, EN 1652 |
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.
Industrial-Grade Export Packaging
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.
Advanced Manufacturing & Quality Control
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).
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