Black Steel is a material added by GregTech 5 mod.
Black Steel is a HV-tier material, it is required to create Plascrete Block which is the main component of CleanroomCleanroom. It is also used to create good EV-tier cables and 2 alloys: Red Steel and Blue Steel.
Due to the excessive bulk of including all GregTech 5 blocks and items this navigation box only holds ~10% of all. The reader can view This and This navigation boxes to access the rest.