In occupied Silesia, resistance is organizing. In close contact with the miners and led by an engineer, a group of partisans prepare the sabotage of the steel combine. The going will be tough as the place is closely guarded by the Nazis. But despite a denunciation from a traitor and several violent deaths, they get going and the operation is a success. But the Red Army is approaching and now the coal production must not be sabotaged anymore. On the contrary, the partisans must prevent the Germans from destroying the steel mill and the coal mine...
Unfortunately the movie The Steel Hearts is not yet available on HBO Max.
| Art | Roman Mann | Production Design |
| Art | Anatol Radzinowicz | Production Design |
| Lighting | Józef Marczak | Lighting Technician |
| Directing | Feliks Średnicki | Assistant Director |
| Directing | Aleksander Ciesielski | Assistant Director |
| Camera | Kazimierz Konrad | Assistant Camera |
| Camera | Mieczysław Verocsy | Assistant Camera |
| Art | Józef Galewski | Painter |
| Writing | Stanisław Urbanowicz | Screenplay |
| Writing | Gustaw Morcinek | Story Supervisor |
| Crew | Marian Lis | Pyrotechnician |
| Art | Jerzy Tkaczuk | Assistant Set Decoration |
| Editing | Stanisław Urbanowicz | Editor |
| Production | Zygmunt Król | Unit Manager |
| Costume & Make-Up | Jan Dobracki | Makeup Artist |
| Directing | Jerzy Kawalerowicz | Assistant Director |
| Production | Aleksander Pękalski | Production Manager |
| Sound | Jan Radlicz | Sound |
| Directing | Stanisław Urbanowicz | Director |
| Sound | Mieczyslaw Mierzejewski | Music |
| Camera | Adolf Forbert | Director of Photography |
