Thermowelding process applies the high temperatures generated by the reaction of copper oxide with aluminum in various welding applications.


Reaction Formula: 3CuO + 2Al  Heat effects and 3Cu+Al2O3

All components are used as powders or granules. Once the reaction is initiated by an external heat source, the aluminum reduces the oxygen from the metal-oxide, which will result in a liquid superheated aluminum-oxide (Al(2)O(3). Since these two components are different in density, they separate automatically and the liquid metal can be used for the production of alloys, special metals or for multiple welding applications.


The reaction takes place in a molded graphite mould. The parts to be welded are located into the mould before the reaction. After the powder is ignited, molten metal from the aluminothermic reaction flows around the pieces. The reaction connect them as one solid piece. Exothermic reaction process takes few seconds only. In preparing the joint for thermowelding, the parts to be welded must be cleaned, aligned, and held firmly in place is then made around the joint in the size and shape of the intended weld. A mold made of graphite is built around the joint to hold the molten metal after it is poured.



The  system may be used in welding copper to copper and/or between the following materials:

Steel, satainless steel, rail steel, copper clad steel, galvanized steel, brass, bronze



Thermowelding process provide a perfect connection: 

• There is no possibility of corrosion at the point of the weld.
• Connections are not affected by high current surges. Tests have shown that the electrical conductor will melt before the connection when subjected to very high short-circuit currents.
• Connection conductivity is at least equal or greater than the conductors welded.

other facilities

  • Safe andeasy to operate.
  • excelllent tensile strength
  • Horizontal connection of the grounding grid
  • Easy to operate, no need to be trained
  • a graphite mould could be used for 70 or more connections
  • Low cost
  • No maintanence cost


International Standarts & Certificates: UL, RoHS, CE, IEEE Std.80, UL467 and IEEE837.




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