Abstract
Type 308 austenitic stainless steel weld metals made by SMAW and FCAW were used in order to quantitatively determine the effects of bismuth segregation and sigma phase precipitation as a result of high temperature pretest aging on creep crack growth properties. Tests were conducted using CT-type specimens and the data derived were arranged according to the parameter C ∗. The creep crack growth rate is significantly higher in cases where the metal contains a large amount of bismuth and where sigma phases have adequately precipitated.
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