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Indication of materials
| Material | BDS (Bulgarian State Standard) |
DIN | GOST (Russian State Standard) |
| Cast iron | СЧ 20 | GG 20 | СЧ 20 |
| Bronze | CuSn3Zn7Pb5Ni | GB CuSn2ZnPb | 3-7-5-1(Бр.ОЦСН) |
| Stainless steel | Х18Н10ТСЛ | X6CrNiTi 18 10 | 12Х18Н9ТЛ |
| Steel Chrome 13% | 4Х13 | X46Cr13 | 40Х13 |
| Carbon steel | 45 | C 45 | 45 |
