Abstract
The cracking at heat is one of the main problems which appear at the austenitic steel welding, especially for the austenitics steel without delta ferite. The susceptibility regarding the cracking at heat can be studied analitically by the correlation between two factors: the factor stress constituted by the tension and the deformation which appear in the welding process (FS) and the resistance factor constituted by the capacity of the material to take the stress and the deformations appeared (FR). As a result of the interaction of the both factors is the posibility of susceptibility at the heat cracking. The tendancy at the cracking at heat can be apreciate with a quantitative estimation, named critical speed of cracking (Vcf). The practical determination of these speed suposed for an concret exemple, the knowledge of real plastic deformation at the weld, which are determined in this paper
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