Cemented carbide is one of the hardest metals. In addition, cemented carbide contains hard substance and tough metals that bond the substance. The hard subsistence is tungsten carbide (WC), carbide of tungsten. Tough metals are cobalt (Co) and nickel (Ni) which are the families of iron. These two metals make a hard and strong alloy in combination with each other.
The main properties are hard, (HrA 80 to 94), strong (transverse resistance is about 2 GPa, 200kg/mm2) and large Young's modulus (about three time that of iron).Nippon Tungsten produces original cemented carbide, making use of the above properties and adding further improvement.