What is C11000 Grade Copper?

C11000 grade copper is the global industry standard for high-conductivity electrical applications, officially known as Electrolytic Tough Pitch (ETP) copper. It must maintain a minimum copper purity of 99.90% (including silver) and a controlled oxygen content to ensure an elite electrical conductivity rating of at least 101% IACS. This grade is the most common unalloyed copper used in power distribution, switchgear, and architectural projects.

If you are sourcing C11000 electrolytic tough pitch, you are choosing the most reliable and cost-effective material for minimizing resistive heat loss in high-amperage systems.

The chemical profile of C11000 is defined by its 99.90% purity. The remaining 0.1% consists of trace impurities and a specific oxygen content (0.02% to 0.04%). This oxygen is not a contaminant; it is a refining agent used during the electrolytic process to sequester deleterious elements like iron and lead.

As we analyzed in our technical guide on the purity of C11000 copper, this precise chemical balance is what allows the material to reach its high conductivity while remaining easier to form than oxygen-free grades.

Chemical Composition Limits of UNS C11000 (ASTM B152)

Yes. In the international market, T2 (China), Cu-ETP (Europe), and C11000 (USA) are functionally identical. Most leading mills, including a china t2 copper plate factory, produce material that meets all these standards simultaneously to simplify global supply chains.

You can refer to our international copper equivalent guide to verify how these regional designations map to the same UNS C11000 performance specifications.

Request a Global Grade Compliance Audit

While the chemical purity of C11000 remains constant, its physical strength depends on its temper (hardness). For structural busway work, c11000 h02 (half-hard) is the most common specification, offering a balance of rigidity and formability.

C11000 Mechanical Property Benchmarks (Common Tempers)

When sourcing a heavy C11000 copper bar, ensuring batch-to-batch consistency in these mechanical values is vital to prevent failure in high-voltage switchgear.

The price of C11000 is directly tied to the LME (London Metal Exchange) base price plus a fabrication premium. Because it is the most widely produced industrial copper grade, it generally offers a better ROI than specialty alloys.

To understand how current market volatility and fabrication complexity impact your budget, please refer to our latest analysis on the price of C11000 copper.

1. Is C11000 grade copper easy to bend?

Yes, it is highly ductile. As we analyzed in Is C110 copper bendable?, C11000 can easily handle 90-degree bends in an H02 temper without cracking.

2. Can C11000 be used for precision CNC work?

Yes, but it is "gummy" due to its purity. Procurement managers often outsource C11000 copper cnc machining to facilities with specialized tool geometries to prevent tool smearing.

3. What is the difference between C11000 and C10100?

The main difference is oxygen content. As we explored in the difference between C11000 and C10100, C10100 is oxygen-free (99.99%) and is required for vacuum electronics and hydrogen brazing.

4. Is this grade suitable for thermal heat sinks?

Absolutely. The high thermal conductivity (391 W/m·K) of a heatsink C11000 copper plate makes it superior to aluminum for high-performance CPU and power transistor cooling.

5. Why is C11000 called "Electrolytic"?

This refers to the refining process (electrolysis) used to reach the 99.90% purity. This process pulls pure copper ions onto a cathode, leaving impurities behind.

6. Does C11000 copper develop a patina?

Yes. Over time, a C11000 copper plate or sheet will develop a protective oxide layer. This makes it a popular choice for architectural roofing C11000 copper sheet projects.

To protect your equipment from overheating, always demand a mill-direct C11000 mill test certificate (MTC) for every C11000 copper tube or bar order. This document is your only guarantee that the purity and 101% IACS conductivity standards have been met, shielding you from the risks of sub-standard scrap copper.

Request a Multi-Batch Purity & Quality Assurance Plan

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