... C) Even wearing D) Good wear resistance NameCasting grinding steel balls Size20mm-130mmFeatureA) High hardnessB) No breakageC) Even wearingD) Good ... 1.8-3.3, Si 0.3-1.2, Mn 1.5-2.0, Cr 10-16, P 0.10Max, ... Medium chromium steel ball C 2.0-3.3, Si 0.3-1.2, Mn 1.5-2.0, Cr 4-9, ... 10 Max, S 0.1MaxC)Low chromium steel ball C 2.2-3.5, Si 0.3-1.0, Mn 0 ... tons the sample DIA 130mm high chromium grinding steel balls