Pure Copper Round Bar Cu-ETP 99.95% Pure Copper Rod Hot Rolled Diameter 10 - 300mm In Custom Length

Specification of our copper products

Pure Copper Round Bar Cu-ETP 99.95% Pure Copper Rod Hot Rolled Diameter 10–300mm in Custom Length

A Cu-ETP pure copper round bar is a high-conductivity copper rod manufactured from Electrolytic Tough Pitch Copper, containing 99.95% pure copper with excellent electrical and thermal performance. Due to its outstanding conductivity, formability, and stability, Cu-ETP is widely used in power distribution systems, electrical engineering, transformers, electromechanical components, and precision industrial equipment.

This product description provides a detailed overview of the material specifications, manufacturing process, mechanical properties, applications, quality standards, and customization options to help buyers, engineers, and procurement specialists evaluate and select the ideal Cu-ETP copper rod for industrial use.

1. Product Overview

The Pure Copper Round Bar Cu-ETP 99.95% is manufactured using premium-grade ETP copper (UNS C11000), featuring high purity, smooth surface finish, and excellent machinability. These rods are available in hot-rolled, cold-drawn, and polished conditions, with diameters ranging from 10 mm to 300 mm, and custom lengths tailored to customer requirements—whether for mass production or precision machining.

Cu-ETP copper rods are especially valued in the electrical industry due to their Very High Electrical Conductivity (≥ 101% IACS), making them ideal for components where electrical efficiency and minimal energy loss are essential.

2. Key Features

• Purity: 99.95% Cu-ETP (C11000)

• Diameter Range: 10 mm – 300 mm

• Custom Length: 100 mm – 6000 mm or according to customer requirements

• Manufacturing Method: Hot rolled, cold drawn, extruded, straightened

• Surface Finish: Bright, smooth, polished, or mill finish

• Excellent Conductivity: ≥101% IACS

• High Thermal Conductivity

• Outstanding ductility and workability

• Corrosion-resistant in natural environments

• Environmentally friendly & RoHS-compliant material

3. Chemical Composition (Typical)

Cu-ETP copper contains controlled oxygen content to ensure excellent conductivity while maintaining mechanical strength.

4. Mechanical Properties

These properties make the rod easy to bend, draw, weld, or machine without losing performance.

5. Technical Specifications

5.1 Dimensions and Tolerances

Length tolerance is typically ±5–10 mm, but precision-cut options are available upon request.

5.2 Available Forms

• Solid round bars

• Straight rods

• Long coils (for smaller diameters)

• Machined or surface-treated custom parts

6. Manufacturing Process

The Cu-ETP rods are produced through a high-precision metallurgical process to ensure consistent performance:

1. Electrolytic Copper Refining
   High-purity copper cathodes are refined to achieve 99.95% purity.

2. Melting and Casting
   Raw copper is melted and cast into billets for extrusion or rolling.

3. Hot Rolling or Extrusion
   Billets are hot-worked to achieve desired diameter ranges.

4. Cold Drawing (Optional)
   Used for tighter tolerances and improved surface finish.

5. Straightening & Cutting
   Rods are straightened using precision equipment to achieve excellent linearity.

6. Inspection & Testing
   Every batch undergoes strict quality control, including conductivity testing, ultrasonic inspection, and size measurement.

7. Applications

Cu-ETP 99.95% pure copper rods are widely used in industries that require reliable electrical and thermal performance. Applications include:

7.1 Electrical & Power Industry

• Bus bars and connectors

• Transformer windings

• Switchgear components

• Grounding and earthing systems

• Electrical contacts and terminals

7.2 Electronics & Telecommunications

• Circuit components

• Semiconductor heat spreaders

• RF and microwave components

• EMI shielding materials

7.3 Mechanical & Industrial

• Precision machining parts

• Fasteners, pins, bolts, and shafts

• Hydraulic and pneumatic components

• Tooling and fixtures

7.4 Heat Transfer Equipment

• Heat exchangers

• Radiators and cooling plates

• Induction heating coils

7.5 Decorative and Architectural

• High-polish decorative rods

• Artistic metalwork

• Industrial design components

8. Advantages of Cu-ETP Over Other Copper Grades

8.1 Higher Conductivity

Compared with deoxidized copper (Cu-DHP), Cu-ETP offers 10–15% better electrical conductivity, making it ideal for power applications.

8.2 Cost-Effective

ETP copper is more economical than oxygen-free copper (Cu-OF), while still providing excellent conductivity for most applications.

8.3 Improved Strength & Workability

It offers a balance of ductility and durability, making it suitable for bending, forging, or machining.

8.4 Suitable for Welding and Brazing

While not ideal for hydrogen atmosphere welding, Cu-ETP works well with soldering, brazing, and general fabrication.

9. Quality Standards & Compliance

The product can be manufactured to meet the following international standards:

• ASTM B152 / B187 (C11000)

• EN 13601 / EN 12163

• JIS H3250 C1100

• RoHS Compliance

• ISO 9001:2015

All materials include mill certificates and chemical analysis reports upon request.

10. Customization Options

To meet different industrial requirements, the Cu-ETP copper rods can be customized based on:

10.1 Dimensions

• Diameter: 10–300 mm

• Length: 100–6000 mm or custom cut

10.2 Manufacturing Condition

• Annealed (Soft)

• Half-hard

• Full-hard

• Hot rolled

• Cold drawn

10.3 Surface Treatment

• Polished

• Mirror finish

• Brushed

• Electropolished

• Natural mill finish

10.4 Packaging Options

• Wooden crates

• Plastic-wrapped for corrosion protection

• Bundles secured with steel straps

• Custom export-grade packaging

11. Performance Considerations

11.1 Electrical Performance

The strong conductivity of Cu-ETP makes it ideal for low-loss electrical systems. It ensures:

• Stable current flow

• Lower heat generation

• Increased lifespan of electrical components

11.2 Machining and Fabrication

Cu-ETP is easy to cut, drill, turn, and mill. It produces clean surfaces and tight tolerances when machined.

11.3 Corrosion Resistance

Pure copper naturally resists corrosion in most environments, and even develops a stable protective oxide layer over time.

11.4 Thermal Stability

The high thermal conductivity supports the efficient removal of heat from sensitive components like transformers or heat exchangers.

12. Packaging & Delivery

The copper rods are shipped with reinforced protection to avoid bending, oxidation, and surface scratches.

• Diameter ≤ 40 mm: bundled in hexagonal or round packs

• Diameter ≥ 40 mm: individually wrapped and packed in wooden crates

• Anti-corrosion oil coating available

• Export-grade fumigated wooden cases for international shipment

Shipping options include sea freight, air freight, express delivery, and door-to-door logistics.

13. Why Choose Our Cu-ETP Copper Rods?

✔ Strict Purity Control – 99.95% Minimum
✔ Wide Diameter Range (10–300 mm)
✔ Custom Lengths & Tailored Solutions
✔ Advanced Hot-Rolling and Cold-Drawing Techniques
✔ High Accuracy, Smooth Surface, Tight Tolerances
✔ Competitive Factory Price & Fast Delivery
✔ Professional Technical Support & OEM/ODM Service

14. Product Summary Table

15. Conclusion

The Pure Copper Round Bar Cu-ETP 99.95% is a versatile, high-performance material essential for electrical, thermal, and industrial applications. With exceptional conductivity, corrosion resistance, and workability, it serves as a reliable solution for engineers and manufacturers seeking consistent quality and long-lasting performance.

Available in diameters from 10 mm to 300 mm and custom lengths, this product meets global industry standards and supports customization for diverse project requirements. Whether used in electrical systems, heat exchangers, precision machining, or structural applications, Cu-ETP copper rods deliver unmatched efficiency and durability.