Abstract: A steel door system is disclosed. The steel door system includes a steel door, a steel door jamb, and a steel window frame. Each component of the steel door system is made with minimal materials and joints. The minimal materials and joints greatly reduce the risk of failure of the final steel door system. The steel door is made of steel door stiles and rails that are each formed of a single piece of sheet metal. The steel door jamb is made of three pieces of sheet metal, and the steel window frame is made of three pieces of sheet metal. These components are coupled together to create the finalized steel door system.