... alumina Emery wheel for metal1. Grinding wheels are used for metal removal, dimensioning, and finishing. 2. They consist of ... that is harder than aluminum oxide, is typically used with nonferrous materials such as brass, aluminum, and titanium. 5. ... stainless steel. 6. Synthetic diamond superabrasives are used for grinding nonferrous metals, ceramics, glass, stone, and building materials. Emery wheel ...