Valssataan

Valssataan is a Finnish term used in metalworking and materials processing to denote the passive present form of the verb valssata, meaning "it is rolled." In practice, valssataan describes the process of passing a workpiece between rollers to reduce thickness, alter shape, or achieve a required surface finish. The method is common in sheet metal fabrication, aluminum and steel production, and can also be applied to plastics and composite films. It can be performed as hot rolling or cold rolling, depending on material and product requirements; many operations involve multiple passes and, in some cases, intermediate annealing to restore ductility.

The process parameters include roller gap, reduction per pass, number of passes, lubrication, and temperature control. The outcome is improved dimensional accuracy and surface quality, with possible work hardening in metals that may necessitate subsequent heat treatment. The technique enables precise control of thickness and uniformity across the material width and is adaptable to wide or narrow strips, coils, or sheet stock.

In Finnish technical literature, valssataan is a standard passive construction used to describe rolling operations, while valssaus refers to the rolling process itself and valssata to the act of rolling. The term is primarily used by engineers, machinists, and quality-control personnel involved in metal forming and related manufacturing workflows.