| TÜV NORD | 2014/68/EU Castings, Forgings,Ingots | Certification, Materials‘ Tables |
| AD-2000 W0/TRD100 Castings, Forgings,Ingots | Certification |
| AMERICAN BUREAU OF SHIPPING | Castings, Ingots | Certification |
| Forgings | Certification |
| DET NORSKE VERITAS | Castings | Certification |
| Forgings | Certification |
| LLOYD’S REGISTER | Castings | Certification |
| Forgings | Certification |
| Production of Steel and Ingots | Certification |
| BUREAU VERITAS | Castings | Certification |
| Forgings, Ingots | Certification |
| RINA | Forgings, Ingots | Certification |
| KOREAN REGISTER OF SHIPPING | Ingots | Certification |
| RUSSIAN MARITIME REGISTER OF SHIPPING | Castings, Forgings | Certification |
| ČESKÉ DRÁHY | Castings, Forgings, Machining, Gearing Production, Thermal Treatment and Welding | Certification |
| ŠKODA JS | Forgings | Certification |
| ČEZ, a.s. | Metallurgical and Engineering Products | Certification |
| Slovenské elektrárne | Metallurgical Products | Certification |
