Steel drum and method for manufacturing such a steel drum

Method for manufacturing a steel drum comprising:

• providing a steel sheet;
• creating a cylindrical shape from the steel sheet;
• creating a pattern of a plurality of corrugations on the cylindrical shape such that the corrugations are on the circumferential surface of the cylindrical shape, wherein the step for creating the pattern includes the steps of:
• grouping the plurality of corrugations in at least two clusters;
• providing per cluster, to let the corrugations have a substantially identical shape and size, each corrugation including a peak portion and a valley portion and the size and shape of each corrugation is constant around the circumferential surface of the cylindrical shape, and a peak-to-valley depth of the corrugations is substantially constant;
• providing in the at least one cluster to let each peak portion have a substantially same curved peak shape, and to let each valley portion have a substantially same curved valley shape;
• and
• providing that a peak radius is substantially equal to a valley radius;
• wherein:
• each peak portion being defined as a circular segment with a fixed peak radius;
• each valley portion is defined as a circular segment with a fixed valley radius;
• and
• the shape and/or size of the corrugations in a first cluster differs from the shape and/or size respectively of the corrugations in a second cluster.