Tungsten Carbide Wire Drawing Die YG6 YG8 is composed of tungsten carbide (WC) and cobalt (Co). The content of tungsten carbide is about 94% and 92%, and the content of cobalt is about 6% and 8%. This material is known for its excellent hardness, wear resistance and good impact resistance toughness, and is often used in various mechanical equipment and tools, drawing molds, etc.