This auction is for a solid bar of Elkonite 10W3, 1/2″ X 4″ X 8″. All dimensions are slightly oversized. Elkonite 10W3 (RWMA Class 11) is a tungsten-copper composite (75% tungsten, 25% copper) widely used for resistance welding, Electrical Discharge Machining (EDM), and electrical contacts. It is prized for its high hardness, excellent arc-erosion resistance, and the optimal balance of thermal and electrical conductivity.