cast steel shot: S780 S660 S550 S460 S390 S330 S280 S230 S170 S110 S70 Hardness: 40-50HRC 52-56HRC 56-60HRCDensity: 7.4g/cm3 cast steel grit: G10 G12 G14 G16 G18 G25 G40 G54 G80 Hardness: GP 46-50HRC GL 56-60HRC GH 63-66HRC Density: 7.6g/cm3 Chemical compositions C 0.7-1.20% Mn 0.60-1.20% Si 0.4 -1.2 % S