A process for the production of low carbon steel strips having a good combination of strength an formability, as cast, and a good weldability after the pickling by usual processes, comprising the following steps: casting, in a twin rolls continuous casting machine (1) comprising pinch rolls (3), a strip with a thickness comprised between 1 and 8 mm, having the following composition as weight percentage of the total weight: C 0.02-0.10; Mn 0.1-0.6; Si 0.02-0.35; Al 0.01-0.05; S<0.015; P<0.02; Cr 0.05-0.35; Ni 0.05-0.3; N 0.003-0.012; and, optionally, Ti<0.03; V<0.10; Nb<0.035, the remaining part being substantially Fe; cooling the strip in the area comprised between the casting-rolls and the pinch rolls (3); hot deforming the strip cast through said pinch rolls (3) at a temperature comprised between 1000 and 1300.degree. C. until reaching a thickness reduction less than 15%, in order to encourage the closing of the shrinkage porosites; cooling the strip at a speed comprised between 5 and 80.degree. C./s down to a temperature (Tavv) comprised between 500 and 850.degree. C.; and coiling into a reel (5) the so obtainable strip.

Un procédé pour la production des bandes d'acier à basse teneur en carbone ayant une bonne combinaison de force un formability, comme moulé, et un bon weldability après le marinage par des processus habituels, comportant les étapes suivantes : le moulage, dans un jumeau roule la machine de coulée continue (1) comportant des roulements de pincement (3), une bande avec une épaisseur comportée entre 1 et 8 millimètres, ayant la composition suivante comme pourcentage de poids de tout le poids : C 0.02-0.10 ; Manganèse 0.1-0.6 ; Silicium 0.02-0.35 ; Al 0.01-0.05 ; S