A rolling mill consisting of two or more stands arranged so that the metal being processed travels in a straight line from stand to stand. In continuous rolling, the various stands are synchro?nized so that the strip may be rolled in all stands simultane?ously. Contrast with single-stand mill.

A set of close-coupled mill stands. Tandem mill speeds and deformations are synchronized to control the strip tension and mass flow. This allows simultaneous bar deformation in all the coupled mill stands, without strip buckling or breakage.

A type of cold-rolling mill, the tandem mill imparts greater strength, a uniform and smoother surface and reduced thickness to the steel sheet. Unlike the original single-stand mills, a tandem mill rolls steel through a series of rolls (generally three to five in a row) to achieve a desired thickness and surface quality.