copper tungsten electrical contacts

Our Copper Tungsten productis a press-sinter-infiltrated material with the tungsten content ranging from 30% to 90% by weight. Copper Tungsten costs less thanSilver Tungsten.copper tungsten material has good resistance to arc erosion, mechanical wear, contact welding and good conductivity. They are usually selected for oil, gas, or vacuum, devices. Their contact surfaces will oxidize when switched in air. These press-sinter-infiltrate materials should only be considered for arcing surfaces in air when used as arcing tips, arc plates and arc runners. When switching with moderate contact arcing, with a high copper content may give the lowest erosion. As arcing severity increases, thematerial with the higher refractory content withstand arc erosion better.