What Grade of Copper is C110? (JIS Standard vs. ASTM C11000)

When you see "C1100" on a technical drawing, you are looking at the Japanese Industrial Standard (JIS) for Electrolytic Tough Pitch (ETP) copper. While it may look different from the American 5-digit code C11000, they are essentially the same material with a minimum copper purity of 99.90%.

C1100 is the "workhorse" grade for the electronics and power distribution industries in Asia. If your bill of materials (BOM) specifies C1100, but your supplier offers C11000 or T2 copper, you are receiving a chemically and physically equivalent product.

Working with multiple international standards? Check our [complete cross-reference guide for C11000 / C1100 / T2 copper] to streamline your sourcing.

The short answer is yes. These designations represent the same grade of high-conductivity copper across different global standards. However, the testing protocols and minor impurity limits might vary slightly.

International Standards Comparison for C1100 Grade

If you are sourcing from a china t2 copper plate factory, providing the JIS C1100 specification is standard practice, and the manufacturer will typically provide a C11000 mill test certificate (MTC) that covers all these equivalent standards.

The "grade" of C1100 is defined by two things: high purity and a specific oxygen content (usually 0.02% to 0.04%). This oxygen content is what makes it "Tough Pitch," ensuring the copper is easy to cast and roll while maintaining elite conductivity levels.

Chemical Composition of C1100 / C11000

In terms of performance, C1100 is prized for its thermal conductivity, making it the primary choice for heatsink C11000 copper plate and high-power transformer C11000 copper coil applications.

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Because C1100 is extremely ductile, it is an excellent grade for deep drawing, stamping, and bending. However, its "softness" can be a challenge for precision milling.

If your project requires C1100 copper cnc machining, it is vital to select the correct temper.

Annealed (O): Best for complex wire bending or foil applications.

Half-Hard (C11000 H02): The standard for C11000 electrical copper busbar. It provides enough stiffness for structural support but won't crack during 90-degree bends.

Full-Hard (C11000 H04): Used for springs, connectors, and c11000 copper bar where maximum tensile strength is required.

Precision matters. Explore our [custom C1100 / C11000 CNC machining services] for high-tolerance electrical components and cooling solutions.

Most global electrical projects specify c11000 electrolytic tough pitch copper because of its cost-to-performance ratio. While "Oxygen-Free" copper (C10100) is slightly more conductive, C1100 provides 101% IACS at a significantly lower price point.

Whether you are sourcing C1100 copper tube for HVAC or C1100 copper wire for motor windings, this grade ensures your system operates with minimal resistive heat loss.

Want to dive deeper? Read our comparisons: [What is C11000 Copper?] and [The difference between Copper 110 and C11000].

1. Can I use C1100 for high-frequency welding?

Caution is required. Because C1100 contains oxygen, it can suffer from hydrogen embrittlement during high-temperature welding in reducing atmospheres. If your fabrication process involves intense welding, ask us for a C11000 copper mechanical properties review to see if an Oxygen-Free grade is necessary.

2. Is C1100 copper available in "Polished" finish?

Yes. For architectural or high-end electronic applications, we provide polished t2 copper sheet (C1100). This is often used in luxury roofing C11000 copper sheet projects or decorative busbars.

3. How do I verify the grade of C1100 upon arrival?

Every shipment from an ISO certified C11000 manufacturer should include a Mill Test Certificate. Look for the chemical analysis and the conductivity test result (it must be ≥ 58 MS/m or 100% IACS).

4. What is the typical lead time for custom cut C1100 copper plate?

For standard thicknesses in stock, we offer 48-hour dispatch. For custom cut C11000 copper plate with specific dimensions or CNC pre-drilled holes, the lead time is usually 7-10 business days.

5. Does C1100 meet RoHS and REACH environmental standards?

Absolutely. C1100 is a "pure" copper grade. Our RoHS compliant C11000 copper ensures your end-products can be exported to European and North American markets without regulatory hurdles.

6. Is there a difference in price between C1100 and C11000?

Since they are the same material, the price is identical. The only factor that changes the price is the form factor-for example, C1100 copper strip vs. C1100 copper bar-due to the different processing costs at the mill.

Understanding that C1100 is simply the JIS equivalent of C11000 opens up a global supply chain for your project. By sourcing from a china t2 copper plate factory that understands these international cross-references, you can secure high-quality C1100 material at a much more competitive wholesale rate.

Browse our specialized C1100 / C11000 product lines:

[C11000 copper plate] - Custom cut to your exact dimensions.

[C11000 copper tube] - Available in coils and straight lengths.

[C11000 copper bar] - The industry standard for busbars and switchgear.

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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).

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