a plasma arc torch that includes a torch body having a nozzle mounted relative to a composite electrode in the body to define a plasma chamber . the torch body includes a plasma flow path for directing a plasma gas to the plasma chamber in which a plasma arc is formed . the nozzle includes a hollow , body portion and a substantially solid , head portion defining an exit orifice . the composite electrode can be made of a metallic material with high thermal conductivity in the forward portion electrode body adjacent the emitting surface , and the aft portion of the electrode body is made of a second low cost , metallic material with good thermal and electrical conductivity . this composite electrode configuration produces an electrode with reduced electrode wear or pitting comparable to a silver electrode , for a price comparable to that of a copper electrode .