Atomic Awesome, Big Complicated Machines, Technostalgia

Mesta Memories #21: Sheet Mills and a Pickling Machine

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 Today we’ll look at four types of inter-related rolling mills that produce steel sheets. A jobbing mill rolls steel sheets that range between 1/8″ and 1/2″ in thickness and then send the sheets to a furnace for annealing, producing “blue annealed sheets”. Some plate mills can produce light plates that overlap the output of jobbing mills, but the output of plate mills is not annealed, unlike the jobbing mill. The material sent to a jobbing mill is called “sheet bar” produced by a universal mill or a sheet bar mill and sent to the jobbing mill cold. A jobbing mill uses two-high stands, i.e. stands with two rollers, and consists of a stand with both rollers pinion driven, a roughing stand and a finishing stand.

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