Hardness evaluates a material's capability to resist mechanical dress in and abrasion. Alumina ceramics surpass steel and tungsten carbide resources in hardness. About the Rockwell hardness scale, alumina ceramics vary from HRA80-ninety, putting them slightly below diamonds and previously mentioned chrome steel. Macor is a cheaper material that Shapal Hello https://jimh321rgu7.wikifrontier.com/user