A best-estimate assessment model was established to predict the entire life time of the material due to crack development and propagation in aggressive environment. Stress corrosion cracking (SCC) growth rate was modeled to investigate the influence of corrosion environment on SCC. Uncertainties with respect to material parameters, aggressive medium and mechanical loadings were taken into account. In addition, mean value estimation method (MVM) and monte carlo simulation method (MCS) were used to solve the established theoretical model. The studies demonstrated that the results obtained by using MVM reached agreement to those by using MCS. And the life time of the material due to the crack development and propagation in the aggressive environment was accurately predicted.

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