ETP/ EDM Copper


ETP/ EDM Copper

ETP EDM Copper stands out as a versatile and reliable material in industries requiring high electrical and thermal conductivity combined with excellent machinability.


  • JIS C1100
  • ASTM C11000
  • DIN E-Cu58
  • ISO Cu-ETP


  • TLM Copper products are of the highest purity with superior conductivity. We carry more than 800 sizes for Copper Flat Bars.
  • They are drawn from raw materials of highest quality. Each bar goes through a rigorous quality control program in which they are inspected and electronically tested to ensure consistent top quality.
  • Very popular in Precision Engineering Industries (Mould Makers).
  • Most copper is used in electrical equipment such as wiring and motors. This is due to its good conductibility of heat and electricity.
  • Being practically immune to atmospheric corrosion, Copper is also the obvious choice for roofing, gluttering, downpipes, dampcoursing, etc.
  • Copper also has uses in construction, for example roofing and plumbing, and industrial machinery such as heat exchangers.


ETP (Electrolytic Tough Pitch) EDM (Electrical Discharge Machining) Copper is a high-quality copper alloy specifically engineered for electrical and thermal conductivity, along with excellent machinability. This alloy is widely used in electrical discharge machining applications, where precision and intricate designs are essential. Understanding the properties, applications, and advantages of ETP EDM Copper is crucial for manufacturers, engineers, and professionals in industries such as electronics, aerospace, automotive, and tooling.

Properties of ETP EDM Copper:

  1. High Conductivity: ETP EDM Copper exhibits exceptional electrical conductivity, making it ideal for applications requiring efficient electrical transmission without significant power losses.
  2. Thermal Conductivity: Along with electrical conductivity, ETP EDM Copper also boasts excellent thermal conductivity, ensuring effective heat dissipation, which is crucial in electrical and electronic components.
  3. Machinability: ETP EDM Copper is designed for ease of machining, enabling intricate and precise shapes to be created with minimal effort. This property is especially important in electrical discharge machining processes, where complex geometries are common.
  4. Corrosion Resistance: While not as corrosion-resistant as some other copper alloys, ETP EDM Copper still offers good resistance to corrosion in various environments, ensuring longevity and reliability in use.
  5. Ductility and Formability: ETP EDM Copper is ductile and highly formable, allowing it to be easily shaped and formed into desired configurations, facilitating manufacturing processes.

Applications of ETP EDM Copper:

  1. Electrical Discharge Machining (EDM): ETP EDM Copper is primarily used as electrode material in EDM processes, where it serves as a conductive tool to create intricate shapes and contours in metal workpieces through controlled spark erosion.
  2. Electrical Components: Due to its high electrical conductivity, ETP EDM Copper finds applications in electrical contacts, connectors, busbars, and circuitry where efficient current flow is essential.
  3. Heat Sinks: The excellent thermal conductivity of ETP EDM Copper makes it suitable for heat sinks and heat exchangers in electronic devices and power systems, helping dissipate heat generated during operation.
  4. Injection Molds: ETP EDM Copper is utilized in injection molding applications for producing molds and dies, thanks to its machinability and ability to withstand high temperatures and pressures.
  5. Tooling and Precision Components: Its superior machinability and dimensional stability make ETP EDM Copper an excellent choice for manufacturing precision components, tools, and fixtures in various industries.

Advantages of ETP EDM Copper:

  1. Precision Machining: ETP EDM Copper's exceptional machinability allows for the creation of intricate and precise components with tight tolerances, enhancing manufacturing efficiency and productivity.
  2. Consistent Performance: The uniformity of properties in ETP EDM Copper ensures consistent performance in electrical, thermal, and machining applications, contributing to reliable operation and product quality.
  3. Cost-Effectiveness: Despite its premium quality and performance, ETP EDM Copper offers cost-effective solutions for various applications, providing value through its long-term reliability and performance.


ETP EDM Copper stands out as a versatile and reliable material in industries requiring high electrical and thermal conductivity combined with excellent machinability. Its properties make it indispensable in electrical discharge machining processes and a wide range of other applications where precision, reliability, and performance are paramount. By leveraging the unique properties of ETP EDM Copper, manufacturers can achieve intricate designs, efficient operations, and high-quality products across diverse industrial sectors.

  • ​​​​​​Flat Bar / Bus Bar
  • Square Bar
  • Round Bar / Rod
  • Pipe / Tube
  • Tubing (Coil form
  • Wire
  • Shim / Foil
  • Sheet / Plate

  • Cu: min 99.90% / 99.98% Purity
  • Ultimate Tensile Strength 19 Tons/In2
  • Typical Hardness: 100 HB
  • 0.1% Proof stress: 16 Tons/In2
  • Melting Point: 1085 oC
  • Boiling Point: 2562 oC
  • Electrical Conductivity I.A.C.S @ 68oF: 100%
  • Elastic Coefficient: 12000 Kgmm2

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