Influência da Composi？？o Química do Metal de Adi？？o nas Propriedades Mecanicas e na Susceptibilidade à Corros？o sob Tens？o de Juntas Soldadas do A？o Inoxidável Ferrítico AISI 444

the aim of this study was to investigate the influence of the filler metal chemical composition on the mechanical properties and on the susceptibility to stress corrosion cracking (ssc) of ferritic stainless steel aisi 444 weldments in mgcl2. two types of filler metal of austenitic stainless steel (e316l and e309l) were used. to evaluate the scc susceptibility of weldments, constant load tests and metallographic examinations in tested ssc specimens were conducted. the tensile and hardness tests showed that the welded joints with the filler metal e309l presented mechanical properties superior with relation to welded joints e316l. ssc results showed that the zta/fusion zone interface was the most susceptible to ssc. results also showed that the 444 weldments using e309l electrode presented the best ssc resistance. this may be attributed to the presence of a discontinuous delta-ferrite network in the matrix, which acted as a barrier to cracks propagation from the fusion zone to the interface zone and haz of aisi 444 steel.