Steel sheet for crown caps, method for producing steel sheet for crown caps, and crown cap

摘要

Provided are: a steel sheet for crown caps, which has sufficient strength and formability even if reduced in thickness; a method for producing this steel sheet for crown caps; and a crown cap. A steel sheet for crown caps, which has a component composition that contains, in mass%, 0.0010% or more but less than 0.0050% of C, 0.10% or less of Si, 0.05% or more but less than 0.50% of Mn, 0.050% or less of P, 0.050% or less of S, more than 0.002% but less than 0.070% of Al, less than 0.0040% of N and from 0.0005% to 0.0020% (inclusive) of B, with the balance made up of Fe and unavoidable impurities, and which has a yield strength in the rolling direction of 500 MPa or more, an average Lankford value (r) of 1.1 or more, and an in-plane anisotropy of the Lankford value (∆r) of from -0.3 to 0.3 (inclusive).