During the smelting process, due to some reasons, sometimes the carbon content in the steel does not meet the requirement, so it will need to add recarburizer to increase the content of carbon.
| Grades | C% | S% | N% | H2O |
| CPC | 98.5 | 0.5 | 10000PPM/5000PPM | 0.5 |
| GPC | 98.5 | 0.05/0.03 | 300PPM/100PPM | 0.5 |
| Columnar Graphite | 92/95/96 | 0.05 | 500PPM | 0.5 |
| CAC | 80-92 | 0.5 | ---------- | 0.5 |