Mar 31, 2011 · Tungsten Carbide has a high melting point, 2,870 °C (5,200 °F), is also extremely hard ( Vickers hardness number = 2242) and has a low electrical resistivity (~2×10−7 Ohm•m), compared to other metals (e.g. vanadium 2×10−7 Ohm•m). Rockwell Hardness.
Tungsten Carbide (WC) is a chemical compound made up of equal parts of both tungsten and carbon, making it a stronger material than steel and titanium. Tungsten Carbide measures 90 on the Rockwell "C" scale, which approaches the hardness and durability of natural diamonds.
The Rockwell "A" scale is used for tungsten carbide. Rockwell "C" readings are only shown on the data sheet so that tooling people can compare values of carbide against tool steel. The "A" scale is used on tungsten carbide because the lower indenting force of 60 KGs is less likely to damage the diamond than the 150 KGs force used on the "C" scale.