Slow strain rate tests (SSRT) were conducted on alloy 690 in various lead chloride solutions and metal lead added to 100ppm chloride solution at 288°C. The corrosion potential(rest potential) for the alloy was measured with SSRT tests. The cracking was observed by metallographlc examination and electron probe micro analyser. Also, the corrosion behavior of the alloy was evaluated by anodic Dokirized measurement at 30°C. Resulting from the tests, cracking was characterized by cracking behavior, crack length and crack growth rate, and lead effects on cracking, The cracking was mainly intergranular in mode, approximately from 60 urn to 450 urn in crack length, and approximately ...