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With increasing competition in the global steel market, strip casting technology potentially offers an efficient, economical and environmentally-friendly approach to the production of hot-rolled, coiled steel. This review provides a summary of the basic theory and history in the developments of strip casting operations of steels, along with technical discussions regarding various strip casting initiatives that have been carried out in the past, as well as present. Two strip casting processes are discussed in detail; Twin-Roll Casting (TRC) and Horizontal Single-Belt Casting (HSBC). With its inevitable logic, the emergence of strip casting technology could have an enormous impact on the world’s steel industry. This present paper reviews the progress of strip casting technology for steel from a historical perspective, and this will be followed by a sequel, reviewing recent technical developments in the field.