The Coatings Type Rc Descriptions XC1000 Rc68/71 A composition of 12% Cobalt saturated with 88% 2-5 micron Tungsten Carbide with a particulate hardenss average of Rc82, providing ultimate abrasion resistance. XC1000Ni  Rc68/71 A composition 10% Nickel and 90% Tungsten Carbide providing ultimate abrasion resistance combined with improved corrosion resistance over the XC1000 in PVC applications. XC1000-17 Rc67-70 A compositionof 83% Tungsten Carbide and 17% Cobalt. Higher concentration of Cobalt provides more ductilly than XC4000 Rc55-65 A composition of Nickel, Chromium, and Chromium Carbide producing an abrasion resistant coating with extreme corrosion resistance and excellent ductility, relative to hardness. XC9000 Rc65-70 Our Millennium Carbide is a Tungsten Carbide/ Cobalt featuring a unique sub-micron nmanufacturing process providing improved wear resistance over traditional Tungsten Carbide coatings. Excellent for sub-micron particle abrasion.