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C14500 Tellurium Copper Alloy | C145 Tellurium Copper Rod and Bar

C14500 Tellurium Copper


Tellurium Copper's (TelCu) resistance to hydrogen embrittlement combined with its' high electrical and thermal conductivity make it the ideal choice for electrical applications requiring extensive machining, corrosion resistance, or for the production of hot forged products.

The cutting properties of copper are enhanced significantly by creating a copper alloy with the addition of .5% tellurium (C145 Tellurium) which is adapted for use in high-speed automatic screw machines. On a machinability rating scale with 100% equal to free-cutting brass, Copper 145 Tellurium has a machinability rating scale of 85-90%, compared to pure copper which has a machinability rating scale of approximately 20%. The results? Increased efficiency on manual and automatic production lines as well as a significantly longer tool life!

Tellurium Copper is known by many different names and abbreviations:

  • TelCo
  • EDM
  • TelCu
  • Free-machining copper
  • CuTe
  • ASTM B301 copper
  • Tellurium Copper
  • Tellurium
  • C145 Tellurium
  • CuTel
  • Copper 145 Tellurium
  • Alloy 145
  • Metallic Electrode Material

Applications for TelCu include the following:

  • Welding Torch Tips
  • Switch Gears
  • Bolts
  • Studs
  • Soldering Copper
  • Relay Parts
  • Electrical Switches on Power Semiconductors
  • Fasteners
  • Transformers
  • Circuit Breaker Terminals
  • Electrical Connectors
  • Transistor Bases
  • Gas Cutting Nozzles
  • Motor Parts
  • Switch Parts
  • Soldering Tips
  • Furnace Brazed Parts
  • Screw Machine Products
  • Forgings
  • Plumbing Fittings
  • Sprinkler Heads
  • Fixtures

Located in Hayward, CA Sequoia Brass & Copper has been supplying metal fabrication industries throughout North America since 1983. SB&C specializes in oxygen-free copper and has a substantial inventory of hard-to-find products available for shipment at competitive prices. Our most recent order of Tellurium Copper (TelCu) has been received in-house. Shorter lengths and smaller pieces of TelCu rods and bars are available for immediate purchase and shipment from our on-line store.

We have a greater selection of widths and lengths available in our warehouse, so it you can't find the size or length you need in our on-line store; make sure to call 1-800-362-5255 or email us at

Whether your need is artistic, architectural, automotive, electrical, industrial, plumbing, marine, or something in-between, the knowledgeable and friendly staff at Sequoia Brass & Copper can help match your needs with the highest quality products available.

Call us today at 1-800-362-5255 or email us at for size, weight and pricing information. We look forward to hearing from you.