Method for producing a precoated steel sheet and associated sheet

A precoated steel sheet comprising:

• a steel substrate portion having, on at least one face, a precoating portion, the precoating portion including an intermetallic alloy layer portion and a metallic alloy layer portion extending atop the intermetallic alloy layer portion, the metallic alloy layer portion being a layer of aluminum, a layer of aluminum alloy or a layer of aluminum-based alloy, a thickness of the precoated steel sheet being comprised between 1 mm and 5 mm, and
• at least one laser cut edge surface extending between the faces of the precoated steel sheet and comprising a substrate region and at least one precoating region,
• the precoated steel sheet comprising, on the laser cut edge surface, a plurality of solidification striations, and
• the laser cut edge surface comprises a reduced-aluminum zone, extending over an entire height of the laser cut edge surface and over a length smaller than or equal to a length of the laser cut edge surface, a surface fraction of aluminum on the substrate region of the reduced-aluminum zone being comprised between 0.3% and 6%,
• the precoating region including a portion of the intermetallic alloy layer portion and a portion of the metallic alloy layer portion,
• the at least one main face includes two opposite main faces, the precoated steel sheet including a peripheral edge extending from a first of the two opposite main faces to a second of the two opposite main faces, the cut edge surface extending from the first of the two opposite main faces to the second of the two opposite main faces over an entire height of the peripheral edge.