GENERAL CHARACTERISTICS: COROCARB Fe40+ is an open arc tubular wire filled with 40% fused tungsten carbide (FTC) and up to 10% of special refractory carbides for semiautomatic application, where extreme abrasive wear is encountered. For reduced to crack-free hard-facing of low alloyed steels that have a maximum of 0,45% carbon (a higher carbon content may lead to a small degree of relief checking). Also for hard-facing and repairing tool joints and other drilling and mining parts exposed to extreme wear. ¡El area to be hard-faced should be free of rust, scale, grease or other dirt. Depending on the base metal’s alloy and the size of the area to be hard-faced the advisable preheating temperature should be between 350-500°C (662-932°F). It is highly recommended that the voltage and welding current are kept on the lowest settings possible to preserve the integrity of the tungsten carbide granules. During welding, the arc should be activated such that the weld metal is deposited in coarse droplets rather than running as a smooth flow (indicating parameters are set too high).