Midrex Technologies Midrex Technologies, Inc. is a wholly owned subsidiary of Kobe Steel Ltd. Midrex is a steelmaking process developer, having developed its direct reduced iron (DRI) process. Kobe Steel acts as a licensor for Midrex's technologies. Midrex has recently become active within the sustainable steel sector, adapting its DRI process for hydrogen-based reduction. This profile focuses mainly on Midrex's activities within the hydrogen sector. Midrex Technologies