99.5% Alumina products have excellent Wear Resistance & Corrosion Resistance properties. Since high purity Alumina bodies are almost inert to chemical attack as also being very hard (9 on Mohr Scale) it can be used for a wide variety of applications where combinations of properties are required Wear and Acid Resistance - acid pumps. Corrosion and high temperature - Ferrules for waste heat boilers. Wear and Temperature Resistance - dies for hot extrusion nozzles for a wide variety of applications.