A method for manufacturing an aluminium tube, including providing a slug of an aluminium alloy consisting of >98.4% by weight of Al, 0.10% by weight to 0.30% by weight of Si, 0.25% by weight to 0.45% by weight of Fe, 0.01% by weight to 0.08% by weight of Cu, 0.15% by weight to 0.40% by weight of Mn, at most 0.15% by weight of Mg, at most 0.05% by weight of Zn, at most 0.05% by weight of Cr, at most 0.05% by weight of Ni, at most 0.05% by weight of Ti and at most 0.05% by weight of other impurities, wherein the aforementioned ingredients of the aluminium alloy add to 100% by weight, and impact extrusion of the slug to form an aluminium tube having a shoulder and a neck.