Tungsten Carbide roll (ring) or TC ring is a tool material that contains Tungsten Carbide and Cobalt. Tungsten carbide is the most scratch-resistant metal known to man. Tungsten carbide by itself is a powder. It requires a binder, like nickel, to hold it all together to form a shape. Tungsten Carbide rolls are used in the manufacturing of mill rolls & wire flattening for extended life in applications where long rolling campaigns are required.