A steel sheet for crown cap having: a chemical composition containing, C, Si, Mn, P, S, Al, N, with the balance being Fe and inevitable impurities; a ferrite phase in a region from a depth of of a sheet thickness to a mid-thickness part, the ferrite phase having a standard deviation of ferrite grain size of 7.0 m or less; a yield strength of 560 MPa or more and 700 MPa or less in a rolling direction; and a difference of 25 MPa or more between a yield strength in a 2% strain tensile test and a yield strength in a tensile test after heat treatment at 170 C. for 20 minutes, in the rolling direction.

A steel sheet for crown cap having: a chemical composition containing, C, Si, Mn, P, S, Al, N, with the balance being Fe and inevitable impurities; a ferrite phase in a region from a depth of of a sheet thickness to a mid-thickness part, the ferrite phase having a standard deviation of ferrite grain size of 7.0 m or less; a yield strength of 560 MPa or more and 700 MPa or less in a rolling direction; and a difference of 25 MPa or more between a yield strength in a 2% strain tensile test and a yield strength in a tensile test after heat treatment at 170 C. for 20 minutes, in the rolling direction.

A metal closure for containers comprising a capsule designed to be applied to an opening of a container and including a circular part from which extends a perimeter edge. The perimeter of the edge has a rounding or folding obtained by curling and has a series of deformations made in a radial direction towards the centre of the capsule for forming the seal.

A metal closure for containers comprising a capsule designed to be applied to an opening of a container and including a circular part from which extends a perimeter edge. The perimeter of the edge has a rounding or folding obtained by curling and has a series of deformations made in a radial direction towards the centre of the capsule for forming the seal.

Provided are a steel sheet, having sufficient strength and formability regardless of reduction of thickness, for crown caps; a method for manufacturing the same; and a crown cap. The steel sheet for crown caps has a composition containing C: 0.0010% to less than 0.0050%, Si: 0.10% or less, Mn: 0.05% to less than 0.50%, P: 0.050% or less, S: 0.050% or less, Al: more than 0.002% to less than 0.070%, N: less than 0.0040%, and B: 0.0005% to 0.0020% on a mass basis, the balance being Fe and inevitable impurities, and also has a yield strength of 500 MPa or more in a rolling direction, an average Lankford value (r) of 1.1 or more, and an in-plane anisotropy (r) of Lankford value of 0.3 to 0.3.

A crown, for a medical vial opening, has a top portion and a skirt surrounding the top portion. The skirt terminates at a lower edge defined in a first horizontal plane. An opener assembly is mounted to a portion of the top. A first scoring line extends from the portion of the top to which the opener assembly is mounted to the lower edge of the skirt in a continuous radial direction, and a second scoring line provides an upper radial segment extending from the opener assembly to the skirt along a radial axis, and a lower annular segment that extends circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment. The lower annular segment is defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt.

A crown, for a medical vial opening, has a top portion and a skirt surrounding the top portion. The skirt terminates at a lower edge defined in a first horizontal plane. An opener assembly is mounted to a portion of the top. A first scoring line extends from the portion of the top to which the opener assembly is mounted to the lower edge of the skirt in a continuous radial direction, and a second scoring line provides an upper radial segment extending from the opener assembly to the skirt along a radial axis, and a lower annular segment that extends circumferentially along the skirt in an annular direction and extending from a terminus of the upper radial segment. The lower annular segment is defined in a second horizontal plane equidistant to the first horizontal plane associated with the lower edge of the skirt.

A reduced gauged crown for a container opening includes a corrugated panel portion such that the corrugation strengthens the crown material and allows less material to be used for the crown than would be used for an uncorrugated bottle cap.

A reduced gauged crown for a container opening includes a corrugated panel portion such that the corrugation strengthens the crown material and allows less material to be used for the crown than would be used for an uncorrugated bottle cap.

Provided is a steel sheet having sufficient formability and strength even after sheet metal thinning, the steel sheet including: a chemical composition containing, by mass %, C: more than 0.0060% and not more than 0.012%, 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, in which a dislocation density at a depth position of of a sheet thickness from a surface of the steel sheet is 2.010.sup.14/m.sup.2 or more and 1.010.sup.15/m.sup.2 or less.