spacer grid for placing fuel rods

Method of manufacturing a sheet optimized metal (1) of a zirconium-based alloy, sheet optimized metal (1) defining a plane sheet (BA), the method comprising the step of providing a metal sheet (2) a zirconium-based alloy, wherein the method comprises the steps of subjecting the metal sheet (2) to at least one cold rolling preparation and final cold rolling, in which both the cold rolling preparation as the final cold rolling are performed in a common direction of rolling, heat treating the sheet metal (2) between the cold rolling preparation and final cold rolling so that it partially recrystallize the zirconium-based alloy, in the degree of recrystallization heat treatment is at least 20 percent and not more than 90 percent.