You are welcome here is a discription of Tungsten Carbide that will help. Tungsten carbide is a compound made of the elements tungsten and carbon. Its density makes it highly valuable in the military, and the mining and manufacturing industries. Since its creation, tungsten carbide has even been used to make wedding bands.
Read more: What Is the Hardness of Tungsten Carbide? | eHow.com http://www.ehow.com/about_5039159_hardness-tungsten-carbide.html#ixzz2GsOdn8Tk