| Alloys | The contents of chemical elements, % | |||||
| C | Si | Mn | P | S | V | |
| BU16A | 1.62 | 0.069 | 0.026 | 0.002 | 0.004 | --- |
| BU22A | 2.25 | 0.065 | 0.024 | 0.002 | 0.004 | --- |
| BU27A | 2.70 | <0.1 | <0.1 | 0.003 | 0.003 | --- |
| CAST IRON | 4.53 | 0.082 | 0.51 | 0.021 | 0.025 | 1.1 |
| All the rest elements in hundredths and thousandths fractions | ||||||