Finishing Materials. Artificial stone is the general name of artificial marble and artificial granite. It belongs to the cement concrete or polyvinyl acetate concrete. To decorate the internal surfaces, natural stones are usually used because of their grain, texture, weight (only half of the natural stone), high intensity, thin thickness and easiness to adhesive.
Reasonable machining hardness range for iron and steel castings. As for machining process, the hardness is an important issue. Too high hardness will harm .