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C11000 ETP Copper Round Bar Excellent Electrical Conductivity & Machinability
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xProduct Details
| Products Name | Pure Copper Bar | Diameter | 4 - 200mm |
|---|---|---|---|
| Length | Custom Any Length As Request | Standard | GB ASTM EN DIN |
| Loading Port | Shanghai Port | Shape | Round |
| Service | Cutting | Company Type | Factory |
| Other Material | Brass | Packing | Wooden Box |
| Highlight | ETP copper round bar,copper round bar electrical conductivity,machinable copper round bar |
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Product Description
C11000 ETP Copper Round Bar Excellent Electrical Conductivity & Machinability
Specification of our copper products
| Product Name | Pure Copper Bar |
| Material | Copper |
| Standard | ASTM, AISI, JIS, DIN, GB, EN |
| Grade |
C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920,C10930, C11000,C11300,C11400,C11500,C11600,C12000,C12200,C12300,C12500,C14200, C14420,C14500,C14510,C14520,C14530,C17200,C19200,C21000,C23000,C26000, C27000,C27400,C28000,C33000,C33200,C37000,C44300,C44400,C44500,C60800, C63020,C65500,C68700,C70400, C70620,C71000,C71500,C71520,C71640,C72200 T1,T2,T3,TU1,TU0,TU2,TP1,TP2,TAg0.1, |
| Shape | Round |
| Temper | O-H112; T3-T8; T351-T851 |
| Diameter | 4 - 300mm |
| Length | custom cutting any length as request |
| Payment terms | T/T,L/C,western union |
| Price terms | CFR,FOB,CIF,Ex-work,CNF |
| Package | Standard export seaworthy package or as required. |
| Contact | If you have any question,please feel free to contact me. |
Product Introduction
C11000 Electrolytic Tough Pitch (ETP) Copper Round Bar is a high-performance, commercially pure copper product engineered for applications where superior electrical conductivity, thermal efficiency, and ease of machining are critical. Widely recognized under the UNS C11000 designation and compliant with ASTM B187 standards, this round bar offers an ideal balance of ductility, strength, and fabricability—making it a go-to material for electrical engineering, industrial automation, precision manufacturing, and architectural detailing.
Unlike oxygen-free coppers, C11000 contains a small, controlled amount of oxygen that enhances hot workability while maintaining near-perfect electrical performance—ideal for both mass production and custom fabrication environments.
Why Choose C11000 Round Bar?
- ≥100% IACS Electrical Conductivity: Among the highest in commercial metals.
- Outstanding Machinability: Smooth cutting, minimal tool wear, excellent surface finish.
- High Thermal Conductivity: Efficient heat dissipation for thermal management systems.
- Excellent Cold & Hot Formability: Suitable for bending, stamping, extrusion, and drawing.
- Corrosion Resistant: Performs reliably in atmospheric and mildly aggressive environments.
- Fully Traceable & Certified: Supplied with Mill Test Reports (MTRs) and compliance documentation.
Chemical Composition (Per ASTM B187 / UNS C11000)
| Element | Maximum Allowable (wt.%) | Typical Value |
|---|---|---|
| Copper + Silver (Cu + Ag) | ≥99.90% | 99.95% |
| Oxygen (O) | 0.02–0.04 | 0.03% |
| Lead (Pb) | ≤0.005 | <0.002% |
| Iron (Fe) | ≤0.005 | <0.003% |
| Sulfur (S) | ≤0.003 | <0.001% |
| Bismuth (Bi) | ≤0.001 | Trace |
| Total Impurities | ≤0.03 | ~0.02% |
Note: Silver is counted toward copper content per ASTM practice. Low impurity levels ensure minimal disruption to electron flow.
Key Physical & Mechanical Properties
| Property | Annealed (Soft) | 1/2 Hard | Hard (Cold-Worked) |
|---|---|---|---|
| Tensile Strength (MPa) | 200–250 | 260–310 | 340–400 |
| Yield Strength (0.2% offset, MPa) | 60–80 | 180–220 | 280–340 |
| Elongation (%) | ≥45 | 10–20 | 3–8 |
| Hardness (HV) | 40–60 | 70–90 | 100–120 |
| Electrical Conductivity | ≥100% IACS | ≥98% IACS | ≥97% IACS |
| Thermal Conductivity (W/m·K) | ~401 | ~398 | ~395 |
| Density (g/cm³) | 8.94 | 8.94 | 8.94 |
| Coefficient of Thermal Expansion (20–100°C) | 16.5 × 10⁻⁶ /°C | — | — |
Temper can be customized based on application requirements—annealed for forming, hard for structural support.
Superior Machinability: A Core Advantage
One of the standout features of C11000 ETP copper round bar is its excellent machinability, especially when compared to many other high-conductivity metals:
- Chip Control: Produces short, manageable chips during turning or milling.
- Surface Finish: Achieves Ra values as low as 0.4–0.8 μm with standard tools.
- Tool Life: Carbide or high-speed steel (HSS) tools maintain sharpness longer than with brass or bronze.
- Coolant Compatibility: Works well with water-soluble coolants, reducing thermal deformation.
This makes C11000 ideal for producing electrical connectors, terminals, bushings, valve components, and custom fittings where dimensional accuracy and surface quality matter.
Common Industrial Applications
| Sector | Typical Uses |
|---|---|
| Electrical Engineering | Busbars, switchgear parts, terminal blocks, grounding rods, motor commutators |
| Automation & Robotics | Conductive shafts, sensor housings, encoder rings, robotic joint components |
| Precision Manufacturing | Custom machined parts, jigs, fixtures, EDM electrodes |
| HVAC & Refrigeration | Manifolds, distributor tubes, brazed assemblies |
| Renewable Energy | Inverter bus structures, battery interconnects, solar tracker joints |
| Architecture & Design | Decorative columns, handrails, lighting fixtures (often polished or patinated) |
Its dual strength in conductivity and machinability eliminates the need to compromise between electrical performance and manufacturability.
Available Specifications
| Parameter | Options |
|---|---|
| Diameter Range | 6 mm to 200 mm (standard); custom sizes available |
| Lengths | 1 m, 2 m, 3 m, 6 m; cut-to-length service offered |
| Temper Conditions | Annealed (O60), 1/2 Hard (H02), Hard (H04) |
| Surface Finish | As-drawn, turned, ground, or polished (Ra ≤ 0.8 μm) |
| Tolerances | ISO h9/h11 for diameter; ±0.5 mm on length (tighter on request) |
| Packaging | Bundled with protective film, wooden crates for export |
All bars are ultrasonically cleaned and visually inspected to prevent surface defects like scratches, pits, or oxide streaks.
Compliance & Certifications
Our C11000 round bars meet or exceed the following international standards:
- ASTM B187: Standard Specification for Copper Bar, Rod, and Shapes
- UNS C11000: Unified Numbering System designation
- EN CW004A (Cu-ETP): European equivalent
- JIS H3250: Japanese Industrial Standard for copper and copper alloy bars
- RoHS & REACH Compliant: Free from restricted hazardous substances
Each shipment includes:
- Mill Test Report (MTR)
- Certificate of Conformance (CoC)
- Material Safety Data Sheet (MSDS/SDS)
Comparison: C11000 vs. Other Copper Grades
| Feature | C11000 (ETP) | C10200 (OFC) | C14500 (Tellurium Cu) |
|---|---|---|---|
| Electrical Conductivity | ≥100% IACS | ≥101% IACS | ~93% IACS |
| Oxygen Content | 0.02–0.04% | <0.001% | 0.02–0.04% |
| Machinability (Relative) | Good | Fair | Excellent |
| Cost | Low | High | Moderate |
| Best For | General electrical & thermal apps | High-vacuum, hydrogen env. | High-speed machining |
While C14500 offers better chip-breaking for automated lathes, C11000 remains the top choice when maximum conductivity is non-negotiable.
Handling & Storage Tips
- Store in a clean, dry, well-ventilated area away from direct sunlight.
- Avoid stacking bare bars directly on concrete (use wooden pallets).
- Prevent contact with sulfur-containing materials (e.g., rubber, some paints) to avoid tarnishing.
- For long-term storage, apply corrosion-inhibiting paper or VCI film.
Sustainability & Recyclability
C11000 copper is 100% recyclable without loss of properties. Over 80% of all copper ever mined is still in use today. Choosing recycled-content C11000 (available on request) reduces environmental impact while maintaining performance—supporting ESG and circular economy goals.
Technical Support & Custom Solutions
We offer:
- Material selection consulting
- Prototype machining services
- Batch traceability down to cathode lot
- Export documentation (COO, phytosanitary if needed, customs codes)
Whether you need a single precision-ground bar or monthly tonnage for OEM production, our team ensures consistent quality and on-time delivery worldwide.
Frequently Asked Questions
Q: Can C11000 be welded?
A: Yes, but with care. Use inert gas shielding (TIG/MIG). Avoid welding in hydrogen-rich atmospheres due to risk of steam embrittlement from oxygen-copper reaction.
Q: Is it suitable for food or medical applications?
A: Not directly. While copper has antimicrobial properties, C11000 isn’t certified for direct food contact unless specially processed and tested per FDA or EU 10/2011. Consider certified alloys if required.
Q: How does surface oxidation affect performance?
A: Light oxidation (reddish tarnish) doesn’t significantly impact bulk conductivity but may increase contact resistance. For critical contacts, use tinned or silver-plated finishes.
C11000 ETP Copper Round Bar stands out in the industrial metals landscape by delivering world-class electrical conductivity alongside surprisingly good machinability—a rare combination that streamlines design and manufacturing. From power distribution hubs to precision-engineered automation components, it enables engineers to build efficient, reliable, and cost-effective systems without trade-offs.
Backed by rigorous quality control, global compliance, and flexible customization, our C11000 round bar is more than a raw material—it’s a performance enabler for the electrified future.
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