Abstract
Based on the stress classification data of stress corrosion cracking failures, we found that 70% to 80% of SCC could be attributed to the residual stress caused by welding or working process. Therefore, it is extremely effective for the prevention of SCC initiation to control residual stress quantitatively. However, there are few reports on the SCC susceptibility in relation to the stress of plant apparatus measured quantitatively.
Here, the role of residual stress was reviewed on the SCC failures of the materials; carbon steel, low alloy steel, stainless steel and Cu alloy. It was emphasized to obtain more correctly the SCC threshold stress and acceptable stress of structure materials in various environments by comparing the laboratory data with the field ones.
