Cast Steel Grit.xlsx 
| Item | National standard grit | High quality grit | |
| Chemical composition % | C | 0.85-1.20 | 0.10-0.20 |
| Si | 0.40-1.20 | 0.10-0.35 | |
| Mn | 0.60-1.20 | 0.35-1.50 | |
| S | <0.05 | <0.05 | |
| P | <0.05 | <0.05 | |
| other | Microelement | ||
| Hardness | GP | HRC46-50 | HRC46-50 |
| GL | HRC56-60 | HRC56-60 | |
| GH | HRC63-65 | HRC63-65 | |
| Density | ≥7.40 g/cm3 | 7.6 g/cm3 | |
| Metallographic structure | tempered martensite | tempered martensite + bainite | |
| Appearance | Polygon spherical , semi-spherical , flat grain＜10％ crack<40% | Polygon spherical , semi-spherical , flat grain＜5％ crack<30% | |
