wear low,good toughness , broken less,high hardness metal ball widely used in cement building materials, metal mines, coal ... ceramic coatings, light industry papermaking, magnetic materials, and other industries of powder preparation and superfine processing. The product high hardness, wear ... 40,φ50,φ60,φ70,φ80,φ90,φ100surface hardness: low alloy of metal ball HRC≥45 high alloy of metal ball HRC58-66