UNS C11000 Seamless Tube
Henan Gnee New Material Co., Ltd. is one of the most professional manufacturers and suppliers of uns c11000 seamless tube in China, specialized in providing high quality copper products with competitive price. Welcome to buy discount uns c11000 seamless tube for sale here from our factory. Customized orders are welcome.
C11000 Copper Bus Pipe for Electrical Conductors | High Conductivity Hollow Copper Tube
In my 20 years managing copper tube production lines, I've seen trends come and go, but one material remains the absolute king of the electrical industry: UNS C11000 Seamless Copper Tube.
Engineered for Maximum Electrical Efficiency.
Unlike standard plumbing tubes, our C11000 (Cu-ETP) Copper Bus Pipes are specifically manufactured for high-current electrical applications. With an electrical conductivity exceeding 100% IACS, these hollow conductors are the industry standard for electrical switchgear, induction heating coils, and high-frequency waveguides.
Alloy: C11000 (Cu-ETP)
Chemical Composition: Cu ≥ 99.90%, O: 0.005-0.040%
Electrical Conductivity:≥ 100% IACS (at 20°C)
Standard: ASTM B188 (Electrical Bus Pipe), JIS H3300, etc.
Temper: O60 (Soft), H55 (Half Hard), H80 (Hard)
Shapes: Round, Square, Rectangular
Application:
Electrical Busbars (Hollow conductors)
Induction Heating Coils
Electronic Waveguides
High-current electrical applications
1. What is UNS C11000 (ETP) Copper?
UNS C11000, known as Electrolytic Tough Pitch (ETP), is the global benchmark for electrical conductivity. When we say a metal conducts electricity, we measure it against copper. C11000 is that standard.
It is 99.90% pure copper with a specific, deliberate oxygen content that scavenges impurities to maximize electrical flow.
Chemical Composition Table
| Element | Symbol | Content (%) | Function |
| Copper | Cu | ≥ 99.90% | Ensures maximum conductivity. |
| Oxygen | O | 0.005 - 0.040% | Removes impurities; improves conductivity rating. |
|
Product Name |
copper pipe/ tube |
|
Material |
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920, TP1,TP2,C10930,C11000,C11300,C11400,C11500,C11600,C12000,C12200,C12300,TU1,TU2,etc. |
|
Wall Thickness |
0.2mm-50mm |
|
Outer Diameter |
2-200mm |
|
Tolerance |
+/-0.02mm |
|
Cu(Min) |
99.99% |
|
MOQ |
1 Ton |
|
Payment |
T/T, LC, Western Union, Paypal |
|
Package |
Standard seaworthy export packing: 3 layers of packing, inside is kraft paper, water plastic film is in the middle and outside GI |
When you send us an RFQ (Request for Quotation), it helps to reference the correct standard. Here is a quick reference table I compiled based on common buyer requests.
Standard Specifications for C11000 Copper Tubes:
Material Standard: ASTM B75, ASTM B88, ASTM B280, ASTM B68, ASME SB75
Size Range: 6 mm to 300 mm outer diameter (Custom sizes available)
Wall Thickness: 0.5 mm to 10 mm
Length: Straight, Coil, Cut-to-Length
Available Temper:
Hard Drawn (H58)
Annealed (O60)
Half-Hard (H55)
Applications of C11000 Copper Tubes:
- Electrical Industry – Busbars, grounding systems, power transmission
- HVAC & Refrigeration – Air conditioning, cooling coils, condensers
- Plumbing & Water Supply – Potable water systems, gas pipelines
- Heat Exchangers & Boilers – Thermal transfer in industrial processes
- Automotive & Aerospace – Fuel lines, hydraulic systems, radiator tubes
Applications: Why Choose C11000 Over C12200?
While C12200 is standard for plumbing, C11000 is the king of electricity. Our C11000 copper tubes are designed for industries requiring efficient heat dissipation and current transmission.
1. Water-Cooled Hollow Conductors
Used in induction heating coils and generator stators. The hollow center allows cooling water to flow through, removing heat generated by high currents. C11000's high thermal conductivity ensures rapid heat transfer.
2. Electrical Bus Systems
For switchboards and power distribution panels. C11000 square or rectangular copper tubes serve as rigid busbars, offering a better skin-effect ratio than solid bars in high-frequency applications.
3. Electronic Waveguides
Due to the high purity and smooth internal surface finish, our copper tubes are ideal for radar and telecommunication waveguides.
Mechanical & Physical Properties
| Feature | Value / Specification | Why it Matters |
| Conductivity | 101% IACS (Annealed) | The highest standard for electrical efficiency. |
| Common Standards | ASTM B188 (Bus Pipe) ASTM B75 (Seamless Tube) |
Ensures dimensions and testing meet global norms. |
| Thermal Conductivity | ~391 W/(m·K) | Excellent for heat exchangers and cooling systems. |
| Tensile Strength | 220–385 MPa (depending on temper) | Balances structural integrity with formability. |
Selection Guide: C11000 vs. C12200 (DHP)
This is the most common mistake I see in procurement. Buyers choose C12200 because it is common for plumbing, but it is terrible for electrical use.
Comparison Table: Which one do you need?
| Feature | UNS C11000 (ETP) | UNS C12200 (DHP) |
| Primary Use | Electrical / Electronic | Plumbing / HVAC / Refrigeration |
| Conductivity | High (101% IACS) | Low (~85% IACS) |
| Oxygen Content | Yes (contains Oxygen) | No (Deoxidized with Phosphorus) |
| Welding | Good for Soldering/Brazing. (Risk of Hydrogen Embrittlement) |
Excellent for all welding. (No Hydrogen Embrittlement) |
| Best For... | Busbars, Induction Coils, Waveguides. | Water pipes, Heat Exchanger shells. |
My Advice: If your application involves electricity or magnetic fields, never substitute C11000 with C12200, or your equipment will overheat.
Manufacturing & Quality Assurance
Quality is not just a promise; it is verified data. At GNEE COPPER, every batch of C11000 copper piping undergoes rigorous testing before shipment:
Eddy Current Testing (ECT): To detect surface and sub-surface defects such as cracks or pits.
Conductivity Testing: We ensure every tube meets the minimum 100% IACS requirement.
Dimension Control: Strict tolerance control on Wall Thickness and Outer Diameter (OD) for precision fitting.
Surface Treatment: Pipes are supplied clean, bright, and free from oxidation.
How Our 20 Years of Experience Guarantees Quality
Anyone can buy a machine, but not everyone has the know-how. Here is how we ensure the quality of your order:
Eddy Current Testing (100%): Every inch of seamless tube passes through our electromagnetic scanners to detect invisible cracks or pinholes.
Strict Tolerance Control: We don't just meet ASTM standards; we aim for the tighter side of the tolerance range to ensure your assembly fits perfectly.
Export-Ready Packaging: We know the dangers of sea freight. All C11000 tubes are packed in wooden cases with desiccant agents to prevent moisture damage during shipping.
FAQ: Questions I Get Asked Weekly
Q: Can UNS C11000 Seamless Tube be bent?
A: Yes, absolutely. If you order the Annealed (Soft) temper, it has excellent ductility and is perfect for bending into complex induction coils.
Q: Do you provide Mill Test Certificates (MTC)?
A: Yes. Every shipment comes with a full MTC detailing the chemical composition, mechanical testing, and electrical conductivity results.
Q: What is the lead time for custom sizes?
A: With our optimized production schedule, we can typically ship custom seamless tubes in 2–3 weeks.
Ready to Order High-Conductivity Copper Tubes?
Whether you need square bus pipes for a transformer project or round hollow conductors for induction coils, we have the stock and custom capability to support you.
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