Method for crimping an electrical contact, in which - the following are provided: • an electrical cable comprising a plurality of conductive strands made of aluminium, • an electrical contact made of copper with a crimping zone extending in a longitudinal direction and comprising a base and two wings (122, 124) each extending from one side of the base to form a channel that is essentially U-shaped in section in a plane perpendicular to the longitudinal direction, • a crimping tool comprising a punch, this punch having a channel that is essentially W-shaped in section in a plane perpendicular to a longitudinal direction of the electrical contact when it is positioned in the crimping tool, this channel having two segments (348, 350) in succession in the longitudinal direction, a deeper segment for compressing wings (122, 124) of the electrical contact at a mechanical retention portion, and a shallower segment for compressing the wings (122, 124) at an electrical conduction portion, the difference in height (h) between these two segments (348, 350) being between 0.4 and 0.7 mm, - the crimping zone is crimped onto the cable, the wings (122, 124) being bent over and compressed onto the cable; the crimping zone after crimping itself comprising the mechanical retention portion and the electrical conduction portion, the mechanical retention portion and electrical conduction portion being materially continuous with one another and the mechanical retention portion and electrical conduction portion having different final crimping heights, the final crimping height of the mechanical retention portion being greater than the final crimping height of the electrical conduction portion, in which the difference between the final crimping heights of the mechanical retention portion and of the electrical conduction portion is between 0.4 and 0.7 mm. - the following are provided: • an electrical cable comprising a plurality of conductive strands made of aluminium, • an electrical contact made of copper with a crimping zone extending in a longitudinal direction and comprising a base and two wings (122, 124) each extending from one side of the base to form a channel that is essentially U-shaped in section in a plane perpendicular to the longitudinal direction, • a crimping tool comprising a punch, this punch having a channel that is essentially W-shaped in section in a plane perpendicular to a longitudinal direction of the electrical contact when it is positioned in the crimping tool, this channel having two segments (348, 350) in succession in the longitudinal direction, a deeper segment for compressing wings (122, 124) of the electrical contact at a mechanical retention portion, and a shallower segment for compressing the wings (122, 124) at an electrical conduction portion, the difference in height (h) between these two segments (348, 350) being between 0.4 and 0.7 mm, • an electrical cable comprising a plurality of conductive strands made of aluminium, • an electrical contact made of copper with a crimping zone extending in a longitudinal direction and comprising a base and two wings (122, 124) each extending from one side of the base to form a channel that is essentially U-shaped in section in a plane perpendicular to the longitudinal direction, • a crimping tool comprising a punch, this punch having a channel that is essentially W-shaped in section in a plane perpendicular to a longitudinal direction of the electrical contact when it is positioned in the crimping tool, this channel having two segments (348, 350) in succession in the longitudinal direction, a deeper segment for compressing wings (122, 124) of the electrical contact at a mechanical retention portion, and a shallower segment for compressing the wings (122, 124) at an electrical conduction portion, the difference in height (h) between these two segments (348, 350) being between 0.4 and 0.7 mm, - the crimping zone is crimped onto the cable, the wings (122, 124) being bent over and compressed onto the cable; the crimping zone after crimping itself comprising the mechanical retention portion and the electrical conduction portion, the mechanical retention portion and electrical conduction portion being materially continuous with one another and the mechanical retention portion and electrical conduction portion having different final crimping heights, the final crimping height of the mechanical retention portion being greater than the final crimping height of the electrical conduction portion, in which the difference between the final crimping heights of the mechanical retention portion and of the electrical conduction portion is between 0.4 and 0.7 mm.