A multi-factor coupled model for stress corrosion crack growth rate in HP-13Cr stainless steel was developed using direct current pressure drop method. Measurements were conducted to investigate the critical stress intensity factor in various well depth environments. The single-factor model for stress corrosion crack extension rate, considering temperature, CO2 pressure, and stress intensity factor, was established. Utilizing the factorial analysis, the impact of multi-factor added in the model. Finally, combined with the crack initiation time model, the stress corrosion life of HP-13Cr stainless steel was predicted. The deviation of only 9.1% with the fracture time of oilfield pipelines.
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