TÔLE D'ACIER POUR CAPSULE COURONNE, CAPSULE COURONNE ET PROCÉDÉ DE PRODUCTION DE TÔLE D'ACIER POUR CAPSULE COURONNE

摘要

A steel sheet for crown cap having excellent formability from which a crown cap having an excellent pressure resistance can be produced without an expensive soft liner even if the steel sheet is subjected to sheet metal thinning, the steel sheet having: a chemical composition containing, in mass%, C: more than 0.006 % and 0.012 % or less, Si: 0.02 % or less, Mn: 0.10 % or more and 0.60 % or less, P: 0.020 % or less, S: 0.020 % or less, Al: 0.01 % or more and 0.07 % or less, and N: 0.0080 % or more and 0.0200 % or less, with the balance being Fe and inevitable impurities; and a percentage of a region of more than 0 % and less than 20 % at a position of 1/2 of a sheet thickness, the region having a dislocation density of 1 × 10