These balls give maximum hardness with good corrosion resistance to fresh water, steam, crude oil, gasoline, alcohol, food environment, blood and perspiration. In addition this material is ferro-magnetic and makes a fair permanent magnet. Balls are deep freeze stabilised after heat treatment. International Equivalents AISI 440C, DINX105 CR Mo17, JIS SUS 440C, Z100CD17 Wks 1.4125